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2018 The 9 th PKU-UC Davis plus Bilateral Symposium of the 10+10 Alliance Global Frontiers in Chemistry and Chemical Biology Beijing, P. R. China May 12 - 15 Organized by College of Chemistry and Molecular Engineering, PKU Center for Soft Matter Science and Engineering, PKU Key Laboratory of Polymer Chemistry & Physics of the Ministry of Education, PKU 9届中美10+10双边研讨会
Transcript
Page 1: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

2018

The 9th PKU-UC Davis plus

Bilateral Symposium of the

10+10 Alliance

Global Frontiers in Chemistry

and Chemical Biology

Beijing, P. R. China

May 12-15

Organized by

College of Chemistry and Molecular Engineering, PKU

Center for Soft Matter Science and Engineering, PKU

Key Laboratory of Polymer Chemistry & Physics of the

Ministry of Education, PKU

第9届中美10+10双边研讨会

Page 2: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Symposium Program

Monday, May 14, 2018

08︰00-08︰30 Registration (CCME)

08︰30-09︰00 Opening Ceremony and Photo Time.

Chair: Prof. Wen-Bin Zhang & Prof. Peter Kelly

Speakers: Prof. Yiqin Gao, Prof. Yuguo Ma,

Prof. Alexandra Navrotsky

Group Photo at the Lobby of Building A of CCME

09︰00-12︰05 Lectures (CCME Central Multifunctional Room)

Time Lectures

Chair Prof. Peng Chen

09:00-09:25 Alexandra Navrotsky, UC-Davis, (IL-01)

Thermochemical studies of metal organic frameworks

09:25-09:50 Li-Tang Yan, Tsinghua University, (IL-02)

Transport of Two-Dimensional Nanomaterials Sandwiched inside Cell Membrane

09:50-10:15 Kristie Koski, UC-Davis, (IL-03)

Chemically tunable 2D Materials

10:15-10:35 Student Posters’ Elevator Pitch (P-1 to P-5, 3 min each)

10:35-10:50 Coffee Break & Poster & Discussions

Chair Prof. Gang-yu Liu

10:50-11:15

Jared T. Shaw, UC-Davis, (IL-04)

New Stereoselective Reactions of Rhodium Carbenes for the Assembly of Complex Organic

Molecules

11:15-11:40 Yongquan Qu, Xi’an Jiaotong University, (IL-05)

Surface Regulations of CeO2 for Heterogeneous Catalysis

11:40-12:05 Davide Donadio, UC-Davis, (IL-06)

Characterization of the surface of ice: an atmospheric chemistry catalyst

12︰05-14︰00 Lunch and discussions (CCME A917)

14︰00-17︰15 Lecture (CCME Central Multifunctional Room)

Time Lectures

Page 3: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Chair Prof. Wen-Bin Zhang

14:00-14:25 Shu Wang, ICCAS, (IL-07)

Conjugated Polymer-Based Assembly Materials for Biomedical Applications

14:25-14:50 James Link, Princeton, (IL-08)

Mining Genomes for Lasso Peptides

14:50-15:15 Hua Lu, PKU, (IL-09)

Macrocyclization of Site-Specific Protein-Poly(α-amino acid) Conjugates

15:15-15:35 Student Posters’ Elevator Pitch (P-6 to P-10, 3 min each)

15:35-16:00 Coffee Break & Poster & Discussions

Chair Prof. Peter Kelly

16:00-16:25 Guoqiang Yang, ICCAS, (IL-10)

Organic boron compounds as novel fluorescent probes

16:25-16:50 Matthew P. Augustine, UC-Davis, (IL-11)

Using Mobile NMR Spectroscopy to Study Chemical Problems in a Factory Environment

16:50-17:15 Wen-Bin Zhang, PKU, (IL-12)

Genetically Encoded Click Chemistry: New Tools for Protein-based Materials

18︰00-20︰00 Banquet

Tuesday, May 15, 2018

08︰30-12︰15 Lecture (CCME Central Multifunctional Room)

Time Lectures

Chair Prof. Hua Lu

08:30-08:55 Peng Chen, PKU, (IL-13)

Bioorthogonal Cleavage Reactions in Living Systems

08:55-09:20 Sheila S. David, UC-Davis, (IL-14)

The Secret Life of the Genome: Repair of DNA base modifications

09:20-09:45 Guifang Jia, PKU, (IL-15)

Reversible RNA Adenosine Methylation in Plant Biological Regulation

09:45-10:10 Annaliese Franz, UC-Davis, (IL-16)

Sustainable Production of Biofuels and Bioproducts from Microalgae

10:10-10:30 Student Posters’ Elevator Pitch (P-11 to P-14, 3 min each)

Page 4: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

10:35-10:50 Coffee Break & Poster & discussions

Chair Prof. Sheila S. David

10:50-11:15 Dehai Liang, PKU, (IL-17)

Non-equilibrium protocell models with “living” features

11:15-11:40 Kyle N. Crabtree, UC-Davis, (IL-18)

Microwave spectroscopy for chemical kinetics and laboratory astrophysics

11:40-12:05 Ting Guo, UC-Davis, (IL-19)

Energy Transfer in the X-ray Regime: X-ray Induced Energy Transfer (XIET)

12︰15-14︰00 Lunch and Discussions (CCME A917)

14︰00-17︰15 Lecture (CCME Central Multifunctional Room)

Time Lectures

Chair Prof. Peng Zou

14:00-14:25 Xuefeng Guo, PKU, (IL-20)

Single-Molecule Electrical Detection

14:25-14:50 Wei Xiong, UCSD, (IL-21)

Ultrafast Direct Electron Transfer at Organic Semiconductor and Metal Interfaces

14:50-15:15 Ying Jiang, PKU, (IL-22)

Probing interfacial water at submolecular level by scanning probe microscopy

15:15-15:35 Student Posters’ Elevator Pitch (P-15 to P-17, 3 min each)

15:35-16:00 Coffee Break & Poster & Discussions

Chair Prof. Kyle N. Crabtree

16:00-16:25 Gang-yu Liu, UC-Davis, (IL-23)

New Advances in 3D Nanoprinting

16:25-16:50 Peng Zou, PKU, (IL-24)

Hybrid Voltage Indicators for Imaging Neural Activity

16:50-17:15 Peter B. Kelly, UC-Davis, (IL-25)

Chemistry of atmospheric particles

16︰50-17︰10 Poster Award & Closing Remarks

Prof. Wei Xiong (UCSD to host next 10+10 in 2020)

Prof. Peng Zou (next PKU organizer)

18︰00-20︰00 Dinner

Page 5: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Student Posters

Number Presenter & Title

May 14, 2018, Morning Session

P-1 Wei Tang, Spatially specific RNA profiling via Chromophore-assisted proximity tagging (CAP-tag)

P-2 Jinsong Yuan, Salt- and pH-Triggered Helix−Coil Transition of Ionic Polypeptides under Physiology

Conditions

P-3 Yajie Liu, Tuning SpyTag-SpyCatcher reaction toward orthogonal reactivity encryption

P-4 Yongxian Xu, Hybrid Indicators for Fast and Sensitive Voltage Imaging

P-5 Pengfei Jin, Janus [3:5] polystyrene-polydimethylsiloxane star polymers with a cubic core

May 14, 2018, Afternoon Session

P-6 Wenhao Wu, Topology engineering of proteins in vivo using SpyX interlocking modules

P-7 Ruixuan Wang, Local Transcriptome Analysis via Chemical Activated Proximity-specific Ribosome

Profiling

P-8 Guangzhong Yin, Synthesis of water-soluble and clickable fullerene derivatives: Ready access to C60-

Protein conjugates

P-9 Yuguang Chen, Self-Divided Droplets on Liquid Surface

P-10 Zhongyu Zou, Analysis of Transcriptome on the Spatial and Temporal Dimensions

May 15, 2018, Morning Session

P-11 Lianhuan Wei, The m6A Reader ECT2 Controls Arabidopsis Trichome Morphology by Affecting mRNA

Stability

P-12 Xiaodi Da, Concise synthesis of protein heterocatenanes via “active template” strategy

P-13 Nan Chen, Chemical Proteomic Profiling of N-homocysteinylation with a Thioester Probe

P-14 Han Wu, Tiling Structures from Shape Amphiphiles

May 15, 2018, Afternoon Session

P-15 Chenmaya Xia, Non-blinking single molecule detection in a carbon nanotube by surface-enhanced

raman scattering

P-16 Wei Chen, Enrichment and detection of low-abundance mutations based on an artificial specific

endonuclease

P-17 Yu Shao, Synthesis and self-assembly of tri-block shape amphiphile regio-isomers

P-18 Yuxin Fang, Glycosylase Engineering for The Detection of Oxidative Lesions in DNA (Poster only)

P-19 Yi Li, Proximity-dependent labeling in yeast cell via engineered ascorbate peroxidase II (Poster only)

P-1 to P-10 are displayed on May 14, 2018; P11-P19 are displayed on May 15, 2018.

Page 6: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-01

Thermochemical studies of metal organic frameworks

Alexandra Navrotsky

Peter A. Rock Thermochemistry Laboratory, University of California Davis

[email protected]

Abstract

The thermodynamic stability of new hybrid organic-inorganic materials, including

metal organic frameworks (MOF) and hybrid perovskites for solar applications must be

known to assess their long-term behavior in use. Recent acid solution calorimetric

studies in our laboratory have emphasized MOF polymorphs and hybrid halide

perovskites. A series of MOF polymorphs prepared by grinding confirms that the

energetics depend on the molar volume and mechanochemical treatment enables

transformation barriers to be overcome, producing a sequence of denser and more stable

phases. We are studying their vibrational density of states by cryogenic heat capacity

measurements and inelastic neutron scattering. Hybrid halide perovskites are of limited

thermodynamic stability, not just for reaction with water and air but with respect to

intrinsic decomposition; thus, tetramethylammonium lead iodide can spontaneously

disproportionate to tetramethyl ammonium iodide and lead iodide. Introducing

organic layers to form 2D perovskites aids stability, but there are thermodynamic limits

to the number of perovskite layers that can be incorporated.

Biography

Dr. Alexandra Navrotsky’s research focuses on relating atomic-

level structure and bonding characteristics to macroscopic

thermodynamic behavior in minerals, ceramics and other complex

materials. Advancing high- and low-temperature reaction

calorimetry as a research tool, she has contributed to a broad

spectrum of applications, from mineral thermodynamics to

ceramic processing to zeolites. She has published more than 880

scientific papers. Dr. Navrotsky has received many top honors, including the Benjamin

Franklin Medal in Earth Sciences, the Harry Hess Medal, the Goldschmidt Medal, and

the Kingery Award. She serves on numerous advisory committees and panels in

government and academia, promoting interdisciplinary and collaborative research.

Page 7: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-02

Transport of Two-Dimensional Nanomaterials Sandwiched inside

Cell Membrane

Li-Tang Yan

Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

[email protected]

Abstract

The transport of nanoparticles at the bio-nano interfaces is essential for many cellular

responses and biomedical applications. How two-dimensional nanomaterials, such as

graphene and transition-metal dichalcogenides, diffuse along the cell membrane is,

however, unknown, posing an urgent-important issue to promoting their applications in

biomedicine. Here we show experimentally and theoretically that the diffusive transport

of graphene nanosheets (GNs) sandwiched inside cell membrane varies from Brownian

dynamics to Lévy walks and even directional motion. Specifically, experiments

evidence the sandwiched graphene-cell membrane superstructures predicted by

simulations. Combined simulations and experiments identify sandwiched-GN-induced

pore in the leaflets of cell membrane, spanning unstable, metastable, and stable states.

Analytical model that rationalizes the regimes of these membrane-pore states fits the

simulations quantitatively, leading to a mechanistic interpretation of the emergence of

Lévy and directional dynamics. Our findings inform approaches to program

intramembrane transport of two-dimensional nanomaterials, and suggest design

principles for novel composite systems integrating such emerging nanomaterials inside

biological membranes.

Biography

Prof. Li-Tang Yan obtained his PhD in polymer physics and

chemistry at Tsinghua University in 2007. Then he went to

Bayreuth University in Germany as a Humboldt Research

Fellowship. In 2010, he joined Prof. Anna Balazs’ group at

University of Pittsburgh in USA as a Postdoctoral Research

Fellowship. He returned to Tsinghua University as a faculty in

Department of Chemical Engineering from May 2011. In 2014,

he obtained the “NSFC Award” for Excellent Young Scholar.

His research interests focus on computational and theoretical

aspects of soft matter systems, including nanoparticle cellular

interactions and nano-engineer materials that are self-assembling and self-regulating.

Page 8: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-03

Chemically tunable 2D Materials

Kristie J. Koski

Department of Chemistry, University of California Davis, Davis CA USA 95616

[email protected]

Abstract

Two-dimensional (2D) materials, such as layered chalcogenides, graphene, and oxides,

are an exciting new class of materials with extraordinary physical and chemical

behaviors. These high-performance materials have the potential to enable an entire fleet

of new technological applications ranging from electronics to photonics. To realize this

potential requires (i) the synthesis of novel, high-quality 2D materials, (ii) a broad

spectrum of chemical modification techniques, and (iii) a thorough understanding of

how these modifications control the material physics. In this presentation, I will show

new synthetic growth methods to create high-quality 2D chalcogenide materials

including a new semiconductor, Si2Te3. I will present a novel chemical method to

reversibly intercalate and deintercalate high concentrations of multiple, zero-valent

atoms into 2D materials. The zero-valent nature of the intercalant species allows for

high-density intercalation of metal atoms (Ag, Au, Co, Cu, Fe, In, Ni, and Sn)

effectively doubling the number of atoms of the material. This method achieves unique

physics including Pokrovsky-Talapov transitions, sliding charge density waves, and

modified phononic behaviors. Finally, I will show how this work achieves opto-

electronic application such as color-changing Smart Materials.

Biography

Dr. Kristie J Koski graduated from the University of

Wyoming in 2002 with a B.S. in Physics and a B.S. in

Chemistry. She attended graduate school at the University of

California: Berkeley followed by a postdoctoral position at

Arizona State University and a second position at

Stanford University. Her research currently focuses on 2D

materials and on Brillouin spectroscopy. Dr. Koski has

received the NSF CAREER Award and is funded by the

Office of Naval Research. When not doing science, Professor

Koski is an adrenaline junky known for surfing massive

waves, rock-climbing, and driving her over-powered muscle car way too fast.

Page 9: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-04

New Stereoselective Reactions of Rhodium Carbenes for the

Assembly of Complex Organic Molecules

Jared T. Shaw

Department of Chemistry, University of California, Davis, CA, USA

Abstract

Rhodium complexes catalyze the reactions of a wide variety of metal carbenes. We

have discovered that carbenes that lack electron-withdrawing groups, also known as

“donor/donor” carbenes, exhibit unique reactivity for enantioselective catalysis. We

have used this strategy for the synthesis of variety of 5- and 6-membered ring

products that are useful for the synthesis of drug discovery lead molecules and natural

products.

Biography

Jared Shaw received his B.S. in chemistry from UC

Berkeley (1993), during which time he conducted

undergraduate research with Prof. Clayton

Heathcock. After working as an associate at Gilead

Sciences for one year, Jared entered the Ph.D.

program at UC Irvine and worked with Prof. Keith

Woerpel, graduating in 1999. Jared then moved to

Harvard as an NIH postdoctoral fellow with David

Evans. Dr. Shaw became an institute fellow at the

Institute for Chemistry and Cell Biology (ICCB) at

Harvard Medical School in 2002 where he helped

found the Center for Chemical Methodology and

Library Development (CMLD) in 2003, which later

became part of the Broad Institute of Harvard and

MIT. In July of 2007, Jared joined the faculty of the University of California, Davis

as an assistant professor. He was promoted to associate professor in 2012 and to full

Professor in 2016. He currently works on the development of new methods for the

synthesis of natural products and other complex molecules that modulate biological

phenomena, with a specific emphasis on the discovery of new compounds with the

potential to become antibiotics to treat infections that are resistant to current therapies.

Page 10: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-05

Surface Regulations of CeO2 for Heterogeneous Catalysis

Yongquan Qu*

Center for Applied Chemical Research, Frontier Institute of Science and Technology, Xi’an

Jiaotong University, Xi’an, 710049, P. R. China

*[email protected]

Abstract

Ceria (CeO2) as a support, additive, and active component for heterogeneous catalysis

has been demonstrated with the great catalytic performance, which includes the

excellent thermal structural stability, catalytic efficiency, and chemoselectivity.1,2 In

general, the reversible Ce3+/Ce4+ redox pair and the surface acid-base properties

contribute to the superior intrinsic catalytic capability of CeO2, and hence yield the

enhanced catalytic phenomenon in many reactions. Particularly, nanostructured CeO2

is characterized by a large number of surface-bound defects, which are primarily

oxygen vacancies, as the surface active catalytic sites. Many efforts have therefore been

made on controlling the surface defects and properties of CeO2 by various synthetic

strategies and post-treatments. In this talk, I will give a brief overview of our efforts on

the surface regulations of CeO2 by wet chemical redox etching3 and synthetic pressure4

as well as their catalytic applications.5-7 The strong electronic metal-support

interactions between the metal and CeO2 with the abandant surface defects of oxygen

vacancy enable high catalytic activity and chemoselectivity for hydrogenation of

nitroarenes8 and quinolines9 and C-C coupling reaction.10

References

(1) J. Paier, C. Penschke, J. Sauer, Chem. Rev. 2013, 113, 3949.

(2) Y. Ma, G. Wei, Z. Y. Zhang, S. Zhang, Z. Tian, Y. Liu, J. C. Ho, Y. Qu, Surf. Sci.

Rep. 2018, In Press.

(3) W. Gao, Z. Zhang, J. Li, Y. Ma, Y. Qu, Nanoscale, 2015, 7, 11686.

(4) J. Li, W. Gao, Z. Zhang, S. Zhang, Y. Ma, Y. Qu, ACS App. Mater. Interfaces, 2016,

8, 22988.

(5) J. Li, Z. Tian, Z. Zhang, X. Zhou, Z. Zheng, Y. Ma, Y. Qu, J. Mater. Chem. A 2014,

2, 16459.

(6) Z. Tian, J. Li, Z. Zhang, W. Gao, X. Zhou, Y. Qu, Biomaterials, 2015, 59, 116.

(7) S. Zhang, Z. Q. Huang, Y. Ma, W. Gao, J. Li, F. X. Cao, L. Li, C. R. Chang, Y. Qu,

Nature Commun. 2017, 8, 15266.

(8) S. Zhang, C. R. Chang, Z. Q. Huang, J. Li, Z. Wu, Y. Ma, Z. Zhang, Y. Wang, Y. Qu,

J. Am. Chem. Soc., 2016, 138, 2629.

(9) S. Zhang, Z. Xia, T. Ni, Z. Zhang, Y. Ma, Y. Qu, J. Catal., 2018, In press.

(10) S. Zhang, C. R. Chang, Z. Q. Huang, Y. Ma, W. Gao, J. Li, Y. Qu, ACS Catal.,

2015, 5, 6481.

Page 11: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Biography

Yongquan Qu received his B.S. from Nanjing University at 2001,

M.S. from Dalian Institute of Chemical Physics at 2004 and Ph.D.

from the University of California, Davis under the supervision of

Prof. Ting Guo at 2009. He moved to the University of California,

Los Angeles for the postdoctoral training with Prof. Xiangfeng

Duan in Department of Chemistry and Biochemistry. He became

a faulty member of Center for Applied Chemical Research,

Frontier Institute of Science and Technology, Xi’an Jiaotong

University, China at 2012. His current research interests include

the heterogeneous catalysis in areas of organic synthesis, clean energy production and

environmental remediation.

Page 12: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-06

Characterization of the surface of ice: an atmospheric chemistry catalyst

Davide Donadio

Department of Chemistry, University of California, Davis, Davis, CA, 95616

[email protected]

Abstract

As Faraday realized by microscopic observations already in 1850, the surface of ice is

covered by a thin layer of liquid water even at temperatures far below melting. In spite

of the importance of ice surfaces in terrestrial and atmospheric physical and chemical

processes, the microscopic structure and dynamics of the disordered surface layer of

ice, commonly dubbed quasi liquid layer, is still largely unknown. In this work we use

classical and ab initio molecular dynamics simulations to characterize the structure and

dynamics of the quasi liquid layer at the low-index surfaces of hexagonal ice in the

temperature range that extends from 200 K to the melting temperature, and we

investigate how these properties are modified by the interaction with trace gasses or

ions. Our simulations identify a bilayer-by-bilayer discrete surface melting as a

function of temperature in pure ice models. Such melting behavior determines the shape

of the OH stretching band in infrared and non-linear sum frequency generation spectra

as a function of temperature. The adsorption of HCl induces further disordering at

stratospheric conditions. Ab initio MD simulations are combined with enhanced

sampling to discover the molecular mechanisms of ozone depletion reactions catalyzed

by the surface of ice.

Biography

Dr. Davide Donadio is a theoretical materials scientist. He earned

his Ph.D. in Materials Science in 2003 at the University of Milan

with a thesis on the optical and structural properties of silicate

glasses. As a postdoctoral fellow at ETH Zurich and UC Davis he

studied crystal nucleation and phase transitions, materials at

extreme conditions and nanoscale heat transport. From 2010 to

2015 he lead the Max Planck Research Group of “Theory of

nanostructures” at the MPI for Polymer Research (Mainz,

Germany), investigating non-equilibrium processes at the

nanoscale by molecular simulations. In 2014 he was appointed Ikerbasque professor at

the Donostia International Physics Center (San Sebastian, Spain) and in 2015 he

became assistant professor of Chemistry at UC Davis, where he continues his activity

on surface chemistry, energy materials, thermal transport and development of new

simulation methods. He has published 102 peer-reviewed articles and two book

chapters.

Page 13: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-07

Conjugated Polymer-Based Assembly Materials for Biomedical

Applications

Shu Wang*

Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China

*[email protected]

Abstract

In recent years, conjugated polymers (CPs) integrating recognition, imaging and therapeutic

functions have attracted more and more attention. A novel photodynamic therapy (PDT) system

was developed in which the photosensitizer is activated by chemical molecules instead of outer

light source. In this system, luminal, hydrogen peroxide and horseradish peroxidase (HRP)

were used as bioluminescent molecules and a cationic oligo (p-phenylene vinylene) (OPV) was

used as the photosensitizer. The excited OPV by BRET from luminol sensitizes oxygen

molecule in the surrounding to produce ROS that kill the adjacent cancer cells and pathogenic

microbes. The BRET system can work in vivo even in the deeper tissue, which comes over the

drawback of the deep tissue penetration for PDT with light irradiation. We designed an oligo(p-

phenylenevinylene) unit with thiol groups and a paclitaxelunit (OPV-S-PTX). The OPV-S-PTX

is capable of diffusing into cells, where π-π interactions lead to aggregation. Crosslinking of

the aggregates via oxidation of thiol groups preferentially occurs inside tumor cells because of

their higher internal reactive oxygen species (ROS) concentration. Crosslinked aggregates

effectively “chemically lock” the multichromophore particle inside the cells and this process

decreases the diffusion of the molecules out of the cell. The formation of the chemically locked

particles enhances drug efficacy and helps in reducing resistance. Recently, we have also

described a supramolecular antibiotic switch to reversibly “turn-on” and “turn-off” its

antibacterial activity, which provides a proof-of-concept to regulate antibacterial activity and

avoid accumulation of active antibiotics in the environment. The antibiotic switch relies on

supramolecular assembly and dis-assembly of cationic poly(phenylene vinylene) derivative

(PPV) with cucurbit[7]uril (CB[7]), which regulates their different interaction manners toward

bacteria. This supramolecular antibiotic switch could be a potential strategy to fight bacterial

infections and drug-resistance.

References

(1) H. Bai, H. Yuan, C. Nie, B. Wang, F. Lv, L. Liu, S. Wang, Angew. Chem. Int. Ed. 2015, 54,

13208.

(2) C. Nie, S. Li, B. Wang, L. Liu, R. Hu, H. Chen, F. Lv, Z. Dai, S. Wang, Adv. Mater. 2016,

28, 3749.

(3) Y. Wang, S. Li, L. Liu, F. Lv, S. Wang, Angew. Chem. Int. Ed. 2017, 56, 5308-5311.

S. Li, T. Chen,Y. Wang, L. Liu, F. Lv, Z. Li, Y. Huang, K. S. Schanze, S. Wang, Angew. Chem.

Int. Ed. 2017, 56, 13455-13458.

Page 14: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

(4) S. Liu, H. Yuan, H. Bai, P. Zhang, F. Lv, L. Liu, Z. Dai, J. Bao, S. Wang, J. Am. Chem. Soc.

2018, DOI: 10.1021/jacs.7b12140.

(5) L. Zhou, F. Lv, L. Liu, G. Shen, X. Yan, G. C. Bazan, S. Wang, Adv. Mater. 2018, 30,

1704888.

(6) Y. Wang, S. Li, P. Zhang, H. Bai, L. Feng, F. Lv, L. Liu, S. Wang, Adv. Mater. 2018, 30,

1705418

Biography

Shu Wang is currently a professor of Key Laboratory of Organic

Solids, Institute of Chemistry, Chinese Academy of Sciences. He

earned his B.S. in Chemistry from Hebei University in 1994 and

his Ph.D. from Peking University in 1999. He was a postdoctoral

researcher at Institute of Chemistry, Chinese Academy of

Sciences from 1999 to 2001 and then at Institute of Polymers and

Organic Solids, University of California at Santa Barbara from

2001 to 2004. His current research interest is focused on design,

synthesis of optical functional organic conjugated molecules for

biosensors, cell imaging and disease therapeutics. He has

authored or co-authored more than 200 peer-reviewed articles, and is named in 30 patents or

disclosures. Now he is Executive Editor of ACS Applied Materials & Interfaces.

Page 15: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-08

Mining Genomes for Lasso Peptides

James Link

Department of Chemical Engineering & Bioengineering, Princeton University

[email protected]

Abstract

Lasso peptides are a class of ribosomally synthesized and post-translationally modified

peptides (RiPPs) with diverse bioactivities including antimicrobial activity, receptor

binding, and enzyme inhibition. As their name indicates, they are defined by their

unique threaded structure that resembles a lasso or a slipknot. This talk will describe

our work in genome mining for novel lasso peptides. We have developed new

algorithms to rapidly identify lasso peptides from sequenced genome, growing the class

of lasso peptides from a dozen examples in 2012 to several thousand predicted peptides

today. I will discuss our structural and functional studies on several new lasso

peptides. In particular, our lab has discovered a novel enzyme, lasso peptide

isopeptidase, which specifically recognizes the knotted structure of the lasso peptide

and cleaves it into a linear form. The role of this enzyme in the biological function of

lasso peptides will be discussed.

Biography

James Link grew up in Massachusetts. He attended Princeton

University as an undergraduate, earning a Bachelor’s of Science

in Engineering in Chemical Engineering with High Honors in

2000. He then moved to the California Institute of Technology

(Caltech) in Fall 2000 to begin his PhD in the lab of David Tirrell

as an NSF Graduate Research Fellow. During his PhD, Prof.

Link worked on azide-bearing unnatural amino acids with

applications in protein engineering and proteomics. Prof. Link

moved to the University of Texas at Austin for an NIH

postdoctoral fellowship with George Georgiou. In 2007, Prof.

Link moved back to Princeton as an assistant professor in the department of Chemical

Engineering, now named the department of Chemical and Biological Engineering. He

was promoted to associate professor in 2013. Prof. Link’s work at Princeton has been

recognized with awards including an NSF CAREER award, a DuPont Young Professor

Award, and a Sloan Fellowship in Chemistry.

Page 16: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-09

Macrocyclization of Site-Specific Protein-Poly(α-amino acid) Conjugates

Hua Lu*

College of Chemistry, Peking University, Beijing, 100871, P. R. China

*[email protected]

Abstract

Cyclization and polymer conjugation are two commonly used approaches for enhancing

the pharmacological properties of protein drugs. However, cyclization of parental

proteins often only affords a modest improvement in biochemical or cell-based in

vitro assays. Moreover, very few studies have included a systematic pharmacological

evaluation of cyclized protein-based therapeutics in live animals. On the other hand,

polymer-conjugated proteins have longer circulation half-lives but usually show poor

tumor penetration and suboptimal pharmacodynamics due to increased steric hindrance.

We herein report the generation of a head-to-tail interferon–poly (α-amino acid)

macrocycle conjugate circ-P(EG3Glu)20-IFN by combining the aforementioned two

approaches. We then compared the antitumor pharmacological activity of this

macrocycle conjugate against its linear counterparts, N-P(EG3Glu)20-IFN, C-IFN-

P(EG3Glu)20, and C-IFN-PEG. Our results found circ-P(EG3Glu)20-IFN to show

considerably greater stability, binding affinity, and in vitro antiproliferative activity

toward OVCAR3 cells than the three linear conjugates. More importantly, circ-

P(EG3Glu)20-IFN exhibited longer circulation half-life, remarkably higher tumor

retention, and deeper tumor penetration in vivo. As a result, administration of the

macrocyclic conjugate could effectively inhibit tumor progression and extend survival

in mice bearing established xenograft human OVCAR3 or SKOV3 tumors without

causing severe paraneoplastic syndromes. Taken together, our study provided until now

the most relevant experimental evidence in strong support of the in vivo benefit of

macrocyclization of protein–polymer conjugates and for its application in next-

generation therapeutics.

References

(1) Hou, Y.; et al. and Lu, H. J. Am. Chem. Soc. 2018, 140, 1170-1178.

(2) Yuan, J.; Sun, Y.; Wang, J.; Lu, H. Biomacromolecules 2016, 17, 891-896.

(3) Hou, Y.; Yuan, J.; Zhou, Y.; Yu, J.; Lu, H. J. Am. Chem. Soc. 2016, 138, 10995-

11000.

Page 17: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Biography

Prof. Hua Lu is an assist professor in the College of Chemistry

and Molecular Engineering, Peking University. He obtained his

B.S. from Peking University in 2006 and PH.D. from the

University of Illinois at Urbana-Champaign in 2011. He worked

as a Damon Runyon Cancer Research Foundation postdoctoral

fellow at The Scripps Research Institute (TSRI, La Jolla, CA)

before he started his independent research in Peking University in

2014. His research focuses on the development of methodologies

for the controlled synthesis and medical applications of poly (α-

amino acid) s, sustainable polymers, and protein-polymer hybrids. He is a recipient of

ACS AkzoNobel Award for Outstanding Graduate Research in Polymer Chemistry

(2013), Excellent Young Investigator Grant of NSFC (2017), and Young Investigator

Award of the Chinese Chemical Society (2017).

Page 18: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-10

Organic boron compounds as novel fluorescent probes

Guoqiang Yang*

Institute of Chemistry, University of Chinese Academy of Sciences,

Chinese Academy of Sciences, Beijing, 100101, P. R. China

*[email protected]

Organic boron compounds with electronic donor and/or acceptor group show sensitive

fluorescence with their environment. For the triaryl boron compounds, they give fluorescent

emission of typical intramolecular charge transfer (ICT) compounds due to the electron affinity

of the boron atom. These compounds have two emissive excited states and the energy difference

between them is small, so that a significant temperature effect is observed. Meanwhile, they

have relatively high fluorescence quantum yield due to the small size of the boron atom and its

crowed aryl surroundings. For their good stability and unique luminescent properties, triaryl

boron compounds are studied as novel luminescent probes for the detection of temperature, pH

value and special component in solutions and in bio-cells.

References

(1) Dehui Hu, Tao Zhang, Shayu Li, Tianjun Yu, Xiaohui Zhang, Rui Hu, Jiao Feng,

Shuangqing Wang, Tongling Liang, Jianming Chen, Lyubov N. Sobenina, Boris A. Trofimov,

Yi Li, Jinshi Ma, and Guoqiang Yang, Nature Comm. 2018, 9: 362,DOI: 10.1038/s41467-

017-02270-0.

(2) Jun Liu, Shilu Zhang, Chenghua Zhang, Jun Dong, Chengyi Shen, Jiang Zhu, Huajun Xu,

Mingkai Fu, Guoqiang Yang, Xiaoming Zhang. Chem. Commun., 2017, 53, 11476-11479.

(3) Jun Liu, Xudong Guo, Rui Hu, Jian Xu, Shuangqing Wang, Shayu Li,, Yi Li, and

Guoqiang Yang, Anal. Chem. 2015, 87, 3694−3698.

(4) Xuan Liu, Shayu Li, Jiao Feng, Yi Li and Guoqiang Yang, Chem. Commun., 2014, 50,

2778 – 2780.

(5) Xiaoyan Li, Xudong Guo, Lixia Cao, Zhiqing Xun, Shuangqing Wang, Shayu Li, Yi Li,

and Guoqiang Yang, Angew. Chem. Int. Ed., 2014, 53, 7809-7813.

Page 19: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Biography

Guoqiang Yang (born in 1963) received a BS degree (1985) in

chemistry from Peking University and a PhD degree (1991) from the

Institute of Photographic Chemistry, Chinese Academy of Sciences.

He was working in the Institute of Photographic Chemistry as an

Assistant (1991) and Associate Professor (1993), in the Kyoto

University of Japan (1992-1993, with Professor T. Shimizu) as a

Post-doc researcher of Japan Society for the Promotion of Science,

in the Ecole Nationale Superieure de Chimie de Mulhouse,

Universite de Haute-Alsace, France as a Visiting Professor (1995,

2001, 2003), and in the University of Illinois at Urbana-Champaign as a research associate

(1996-1999, with Professor H. G. Drickamer). From 1999, he has been working in the Institute

of Chemistry, Chinese Academy of Sciences as a full professor, and served as the Deputy

Director of the institute, Director of the Key Laboratory of Photochemistry. He is currently the

Vice President of the University of Chinese Academy of Sciences and Vice President of Chinese

Photochemistry Association. He is one of the Councilors of the Asian and Oceanian

Photochemistry Association, Assistant Editor for the Journal of Photochemistry and

Photobiology A: Chemistry and the member of the editorial committee of the Journal of

Photochemistry and Photobiology C: Review. His research interests include photo-functional

materials, electronic structure of the luminescent materials, novel fluorescent probes and effect

factors on the luminescent properties of the material. He has published 221 research papers and

has authorized 25 patents.

Page 20: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-11

Using Mobile NMR Spectroscopy to Study Chemical Problems in a Factory

Environment

Matthew P. Augustine

Department of Chemistry, University of California, Davis, California 95616, United

States

[email protected]

Abstract

Modern permanent magnet and radio frequency electronics technology now make

NMR spectroscopy amenable to process control in real factory environments. In

comparison to large, expensive, laboratory anchored superconducting magnet-based

spectrometers, it is the decreased size and durability of systems based on these

technological advances that now allows NMR to provide real time feedback during

industrial processes. The factory environment presents an interesting spectrometer

building challenge as standard 5 mm diameter, glass tubes containing pure compounds

or simple mixtures are rarely encountered. Samples are typically well defined,

reproducible complex mixtures presented in metal pipes at ambient or elevated pressure

or in large aseptic metal containers. Early work involving the NMR study of industry

standard sealed “Coke” cans is extended here to study tomato spoilage in 1,000 liter, 1

ton aseptic containers with single sided magnets of varied construction and coil

arrangement. The design and construction of the recently deployed NMR based

tomato spoilage detector will be described. Other early NMR work involving the

study of aqueous geochemistry at up to 3 GPa pressure is also extended here to study

both food and biomass in a high-pressure processing (0.5 GPa) situation for the first

time.

Biography

Matt Augustine is a Professor and Vice – Chair of

Chemistry at UC Davis. He received his BS in

Chemistry from Penn State University, focused on the

application of NMR to problems in Physical Chemistry

as a graduate student with Kurt Zilm at Yale University,

and refined his spectroscopic and theoretical skills as a

National Science Foundation post-doctoral scholar in

Alex Pines lab at UC Berkeley. Matt has spent his

entire career at UC Davis beginning as an Alfred P. Sloan

and David and Lucile Packard fellow, serving the

campus community as a member of the College of

Letters and Science Executive Council, a Faculty

Assistant to the Math and Physical Science Dean, and

more recently a Vice – Chair of the Chemistry Department, and receiving the UC Davis

Page 21: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Distinguished Teaching Award. His research is not conventional, has led to several

patents and a wine analysis company. His primary interest is to make the outdoor

environment his laboratory by developing field-deployable, rugged instruments to

perform spectroscopic measurements and solve chemical problems at the point of care

– a factory, a wine cellar, a mountain, etc.

Page 22: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-12

Genetically Encoded Click Chemistry: New Tools for Protein-based

Materials

Wen-Bin Zhang*

College of Chemistry, Peking University, Beijing, 100871, P. R. China

*[email protected]

Abstract

Genetically encoded chemistry provides versatile control over the process of

chemical reactions and the resulting materials. The spontaneous formation of an

isopeptide bond between a peptide tag and its protein partner is a genetically encoded,

cell-compatible, highly specific and efficient chemistry for protein/peptide conjugation,

as demonstrated in the chemically reactive pair of SpyTag/SpyCatcher.1 In this talk, I

will give a brief overview of our work in the development of genetically encoded

protein chemistry tools (especially those possessing features of click chemistry) and the

use of such tools to create bioactive materials. Through protein engineering, we have

successfully developed a chemical toolbox of genetically encoded chemical reactions.

The possibility to encode chemical information into protein sequences has allowed the

direct cellular synthesis of cyclic proteins, tadpole proteins, star proteins, and other

branched topologies.2 The reaction between proteins bearing multiple reactive groups

also lead to all-protein-based bioactive hydrogels, whose macroscopic properties are

fully genetically encodable.3 By combining this chemistry with protein folding, protein

catenanes and other complex protein topologies can be prepared.4,5 In general,

catenation was found to increase proteins’ stability toward proteolytic digestion and

thermal denaturation.6 It has thus opened new ways to engineer protein’s properties,

both in vivo and in vitro, which has general implications for protein-based materials.

References

(1) B. Zakeri, J.O. Fierer, E. Celik, E. C. Chittock, U. Schwarz-Linek, V. T. Moy, M.

Howarth, Proc. Natl. Acad. Sci. USA 2012, 109, E690.

(2) W. B. Zhang, F. Sun, D. A. Tirrell, F. H. Arnold, J. Am. Chem. Soc. 2013, 135, 13988.

(3) F. Sun, W. B. Zhang, A. Mahdavi, F. H. Arnold, D. A. Tirrell, Proc. Natl. Acad. Sci.

USA 2014, 111, 11269.

(4) X. W. Wang, W. B. Zhang, W.-B. Angew. Chem. Int. Ed. 2016, 55, 3442.

(5) Liu, D.; Wu, W.-H.; Liu, Y.-J.; Wu, X.-L.; Cao, Y.; Song, B.; Li, X.; Zhang, W.-B.

ACS Cent. Sci. 2017, 3, 473.

(6) X. W. Wang, W. B. Zhang, W.-B. Angew. Chem. Int. Ed. 2017, 56, 15014.

Page 23: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Biography

Wen-Bin Zhang is currently an Assistant Professor at the

Department of Polymer Science and Engineering, College of

Chemistry and Molecular Engineering of Peking University.

He received his B.S. in Organic Chemistry from Peking

University in 2004 and his Ph.D. in Polymer Science from

the University of Akron in 2010. He continued at the

University of Akron for his postdoctoral research under the

supervision of Prof. Stephen Cheng for one year, before he

moved to Caltech for a second postdoctoral training with

Prof. David Tirrell in Protein Engineering and Biomaterials. His current research

interests include the rational development of materials that bridges synthetic systems

and biological systems for energy and health-related applications. In particular, he is

interested in developing genetically encoded protein click chemistry and the use of such

tools for protein topology engineering and protein-based bioactive materials.

Page 24: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-13

Bioorthogonal Cleavage Reactions in Living Systems

Peng Chen*

College of Chemistry, Peking University, Beijing, 100871, P. R. China

*[email protected]

Abstract

Employing small molecules or chemical reagents to modulate the function of an intracellular

protein of interest, particularly in a gain-of-function fashion, remains a challenge. In this talk,

I will introduce a “chemical decaging” strategy that relies on our developed Bioorthogonal

Elimination Reactions to control protein activation in living cells. These reactions exhibited

high efficiency and low toxicity for chemical decaging of the masked-lysine residue on

intracellular proteins, which is complementary to the previously used photo-decaging reactions.

In certain applications, particularly within live animals, small-molecule mediated chemical

decaging is highly desired and advantageous. We are currently employing this method to block

specific kinase’s activity in living cells, which allowed the subsequent gain-of-function study

of each kinase within the intracellular signaling transduction network. Together, our strategy

expanded the view of Bioorthogonal chemistry beyond ligation reactions, which may be

generally applicable for chemically rescuing of a given protein, thus manipulating its activity

within a native cellular context.

References

1. Li J, Chen P. “Development and application of bond-cleavage reactions in bioorthogonal

chemistry” Nat. Chem. Biol. 2016, 12, 129-37.

2. Zhang G, Li J, Xie R, Fan X, Liu Y, Zheng S, Ge Y, Chen P. “Bioorthogonal chemical

activation of kinases in living systems”, ACS Cent. Sci. 2016, 2, 325-31.

3. Wang J, Zheng S, Liu Y, Zhang Z, Lin Z, Li J, Zhang G, Wang X, Li J, Chen P. “Palladium-

triggered chemical rescue of intracellular proteins via genetically encoded allene-caged

tyrosine”, J. Am. Chem. Soc. 2016, 138, 15118-21.

4. Li J, Jia S, Chen P “Diels-Alder reaction-triggered bioorthogonal protein activation in

living cells”, Nat. Chem. Biol., 2014, 10, 1003-5.

5. Li J, Yu J, Zhao J , Wang J, Zheng S, Lin S, Chen L, Yang M, Jia S, Zhang X, Chen P.

“Palladium-triggered deprotection chemistry for protein activation in living cells”, Nat.

Chem. 2014, 6, 352-61.

Page 25: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Biography

Professor Peng Chen is now the Chairman of Department of Chemical

Biology at Peking University. He obtained BS degree in Chemistry at

Peking University in 2002 and Ph.D in Chemistry at The University of

Chicago in 2007. After a postdoctoral training at The Scripps Research

Institute, he started his independent career as an Investigator at Peking

University in July 2009 and has been promoted to Full Professor with

tenure in 2014. His research focuses on developing and applying novel

chemistry tools to investigate protein-based interactions and activities

in living cells. His lab is best known for the creation of versatile genetically encoded

photocrosslinkers for studying protein-protein interactions, as well as the development of

bioorthogonal cleavage reactions for protein activation in living systems. He received many

awards including NSFC Distinguished Young Scholar Award (2012), RSC Chemical Society

Review Emerging Investigator lectureship (2014), The Chemical Society of Japan

Distinguished Lectureship Award (2015), Young Scientist Award from Ministry of Education

in China (2016), Tan Kah Kee Young Scientist Award (2016), and Society of Biological

Inorganic Chemistry Early Career Award (SBIC award, 2017).

Page 26: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-14

The Secret Life of the Genome: Repair of DNA base modifications

Sheila David

Department of Chemistry, University of California, Davis, California 95616, United States

[email protected]

Abstract

The DNA bases hold the informational content of DNA. Modified DNA bases are

considered “DNA damage” and have the potential to alter the coding properties and

cause deleterious DNA mutations. There is also a growing appreciation that DNA base

modifications may influence a broad range of cellular processes beyond mediating

permanent DNA mutations. DNA glycosylases play a key role in removing damaged

DNA bases as an initiating step in base excision repair (BER). We have focused

extensively on the repair of oxidized guanines, and the BER glycosylases MUTYH and

NEIL1. MUTYH is the human homolog of MutY and is a [4Fe-4S] cluster glycosylase

that targets removal of an undamaged adenine from 8-oxoguanine (OG):A mismatches.

In contrast, NEIL1 removes a broad range of oxidized guanine lesions, as well as

oxidized pyrimidines, and also is capable of removing lesions in a wide variety of

contexts including ssDNA and G-quadruplexes. Using a multi-pronged approach

including enzyme kinetics, structural studies and cellular assays, we have revealed key

features involved in the recognition and base excision activity of these two distinct

glycosylases. For example, we have recently revealed that the 2-amino group of OG

is a key feature for the initial detection of OG:A over T:A base pairs. My laboratory

also played an important role in the discovery of MUTYH-associated polyposis (MAP),

an inherited form of colorectal cancer, by revealing that the two most common MAP

variants have a hampered ability to recognize OG. We have continued to reveal

interesting features of MAP variants, and the location and dysfunction of disease-

associated variants has provided a window for revealing new features of MUTYH. We

also have shown that the hydantoin lesions Gh and Sp are the best-documented

substrates for NEIL1. In addition, we uncovered that there are two forms of the NEIL1

glycosylase resulting from mRNA editing (recoding) that have distinct differences in

enzymatic processing of DNA base lesions. More recently, we have revealed features

of the repair that are unique to a given NEIL1 substrate and the consequences of NEIL1

recoding. Comparing and contrasting the two glycosylases illustrates the “fine-tuning”

provided by DNA repair glycosylases to detect, mediate and respond to DNA base

modifications.

Page 27: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Biography

Sheila David received her Ph.D. from the University of

Minnesota in 1989. She was an NIH Postdoctoral Fellow

from 1990-1992 at the California Institute of Technology.

She became an assistant professor at the University of

California, Santa Cruz in Fall of 1992, and then

subsequently moved to the University of Utah in 1996,

where she rose through the ranks to Full Professor in 2002.

In 2006, she joined the Chemistry Department, University

of California, Davis. She has received several prestigious

awards, including a UCD ADVANCE Scholar Award for

excellence in research and mentoring, ACS Fellow in 2011,

AAAS Fellow in 2010, A. P. Sloan Research Fellow Award

for 1998-2002, Arnold and Mable Beckman Young Investigator Award (1992-1994).

She serves on editorial advisory boards for DNA repair, (2005-Present) and Cell

Chemical Biology. (2015-present). Her research focuses on using chemical biology

approaches to study DNA repair.

Page 28: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-15

Reversible RNA Adenosine Methylation in Plant Biological

Regulation

Guifang Jia*

Synthetic and Functional Biomolecules Center, Beijing National Laboratory for

Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular

Engineering of Ministry of Education, College of Chemistry and Molecular

Engineering, Peking University, Beijing 100871, China

[email protected]

Abstract

m6A is the most prevalent internal modification in eukaryotic mRNA and preferentially occurs

at the consensus sequence [G/A/U][G>A]m6AC[U>A>C] with a non-stoichiometric ratio.

Although it was first found in 1970s, relative to DNA modifications, the research on m6A

lagged behind due to the lack of detection techniques for RNA modifications. Until 2011, the

discovery of FTO as an m6A-demethylase demonstrates m6A is a reversible and dynamic RNA

modification and reignites investigation of m6A. In 2012, two research group developed m6A

antibody immunoprecipitation-based sequencing method (termed m6A-seq or MeRIP) and

reported the whole-transcriptomic m6A maps. m6A is installed by a methyltransferase complex

(writer) with key subunits identified as METTL3 (Methyltransferase-like 3), METTL14 and

WTAP (Wilms tumour 1-associating protein). So far only two m6A demethylases (eraser), FTO

and ALKBH5 (AlkB homolog 5), have been characterized. m6A is recognized by reader

proteins (such as YTH family proteins) to regulate RNA fate, including mRNA stability,

splicing, nuclear export, translation, primary microRNA processing, and RNA-protein

interactions. These processes affect circadian rhythms, stem cell pluripotency, cancer stem cell

proliferation, RNA virus infection, sex determination in Drosophila, and so on, revealing that

m6A plays critical roles in various biological processes. However, the study of m6A methylation

in Arabidopsis thaliana has been limited to the m6A methyltransferase. Here we will discuss

our discovery and characterization of reversible m6A methylation mediated by demethylase and

read by m6A-binding protein in A. thaliana, and noticeable regulatory roles of these RNA

demethylase a reader in plant development especially floral transition. Our findings reveal

potential broad functions of reversible mRNA methylation in plants.

Keywords: Epitranscriptome; RNA modification; N6-methyladenosine (m6A); m6A

demethylase; m6A-binding protein (m6A reader)

Page 29: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

References:

1. Jia, G.#, Fu, Y.#, Zhao, X.#, Dai, Q., Zheng, G., Yang, Y., Yi, C., Lindahl, T., Pan, T.,

Yang, Y. G., He, C.* Nat. Chem. Biol., 7, 885-7, 2011.

2. Jia, G., Fu, Y., He, C.* Trends Genet., 29, 108-15, 2013.

3. Luo, G.Z., MacQueen, A., Zheng, G., Duan, H., Dore, L.C., Lu, Z., Liu, J., Chen, K., Jia,

G.*, Bergelson, J.*, He, C.* Nat. Commun., 5, 5630, 2014.

4. Liu, J.Z., Yue, Y., Han, D., Wang, X., Fu, Y., Zhang, L., Jia, G., Yu, M., Lu, Z., Deng, X.,

Dai, Q., Chen, W., He, C. *Nat. Chem. Biol., 10, 93-5, 2014.

5. Wang, X., Lu, Z., Gomez, A., Hon, G. C., Yue, Y., Han, D., Fu, Y., Parisien, M., Dai, Q.,

Jia, G., Ren, B., Pan, T., He, C.* Nature, 505, 117-20, 2014.

6. Duan, H-C., Wei, L-H., Zhang, C., Wang, Y., Chen, L., Lu, Z., Chen, P., He, C.*, Jia, G.*

Plant Cell, 29, 2995-3011, 2017.

Biography

Guifang Jia is currently an Associated Professor at Department of

Chemical Biology, College of Chemistry and Molecular

Engineering of Peking University since 2012. She received her B.S.

in Chemistry from China Agricultural University in 2002 and her

Ph.D. in Pesticide Residue Analysis from China Agricultural

University in 2008. She became a visiting student at the University

of Chicago to study chemical biology under the supervision of Prof. Chuan He in 2007,

and continued her postdoctoral research in the laboratory of Prof. Chuan He at the

University of Chicago. Her current research interests including the biological functions

of epitranscriptomics/RNA modifications in human health and plant developments, and

the devlopment of small molecule tuning of epitranscriptomic regulation.

Page 30: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-16

Sustainable Production of Biofuels and Bioproducts from Microalgae

Annaliese Franz

Department of Chemistry, University of California, Davis, 95618, USA

[email protected]

Abstract

Microalgae is a promising feedstock for sustainable production of biofuels and biochemicals;

However, production of fuel feedstocks from microalgae remains prohibitively expensive despite

significant advances in the field. The high costs of nutrients needed for cultivation is a challenge for

large-scale production. To address these challenges, we have investigated the use of nutrient-rich

wastewaters as well as the co-production of value added chemicals from microalgae-based biofuel

production systems. We have investigated the production of one class of valuable co-product;

bioactive lipids with. that can regulate diverse biological functions and are important to human

health. Bioactive lipids are expensive to produce using synthetic means or enzymatically by

fermentation so this provides a valuable opportunity to access these molecules while also using a

co-product strategy to reduce the cost of fuel feedstocks. We describe the development of analytical

methods to measure various lipids in microalgae, including bioactive lipids, and make the first report

of treatment conditions that induce the production of bioactive lipids. Several industrially relevant

microalgae strains have been investigated in this study to compare the production of bioactive lipids

under treatment conditions. Treatment of one strain of microalgae with a chemical trigger under

environmental nutrient stress increased the accumulation of a class of bioactive lipids by up to 400%.

The synergistic approach of utilizing a chemical trigger to enrich the content of bioactive lipids in

microalgae biomass uses methods congruent with current industrial cultivation practices. This

system provides a foundation for studying the mechanisms of formation for bioactive lipids in

microalgae and the development of a biological production route for specific classes of bioactive

lipids.

Biography

Annaliese Franz is an associate Professor in the Department of

Chemistry, and Faculty Director of the Undergraduate Research

Center at UC Davis. She received her B.S. degree in Chemistry from

Trinity University in San Antonio, TX, and her Ph.D. in Organic

Chemistry at UC Irvine in 2002 (Advisor: Keith Woerpel). Then she

moved to Harvard University where she was awarded an NIH

Postdoctoral Fellowship (2002-2005) working under the guidance of

Prof. Stuart Schreiber and then continued her research at the Broad

Institute of Harvard and MIT from 2005-2007. In 2007, Annaliese started as an Assistant Professor

in the Chemistry Department at UC Davis aestablished a research program focused on organic

synthesis, catalysis, bioanalytical chemistry and production of biofuels and bioactive lipids from

microalgae. She has received several awards, including an NSF CAREER award, the American

Chemical Society WCC Rising Star Award, the Outstanding Mentor Award from the Consortium

for Women & Research at UC Davis and an ADVANCE Scholar at UC Davis.

Page 31: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-17

Non-equilibrium protocell models with “living” features

Dehai Liang*

Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of

Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

*[email protected]

Numerous strategies are now available to generate rudimentary forms of synthetic cell-like

entities; however, minimal progress has been made in the sustained excitation of artificial

protocells under non-equilibrium conditions to achieve dynamic features with life-like

properties. As a consequence, even the most highly integrated protocellular systems are

functionally compromised compared with basic life processes, which occur under a continuous

flux of energy and matter exchange. Thus, a major challenge in synthetic protocell research

involves the development of methodologies that enable the sustained activation of chemical

micro-ensembles such that they persist and function under non-equilibrium conditions.

Since electric fields exist both extracellularly and intracellularly, and play a role in

dynamical processes such as tissue morphogenesis and regeneration, we explore the

possibilities of creating non-equilibrium protocells in the presence of electric field. The

coacervate micro-droplets comprising polylysine and short single strands of DNA are formed

within a microfluidic channel. When electric field is applied, the protocells exhibit two dynamic

features: repetitive cycles of vacuolarization and fluid circulation. By taking advantage of the

interplay between vacuolization and circulation, we achieve dynamical fluctuations in size and

shape, chaotic growth and fusion, spontaneous ejection and sequestration of matter, directional

capture of solute molecules, and dynamic localization of an enzyme cascade reaction at specific

droplet locations. Our work represents a novel strategy to couple complex hydrodynamics,

matter exchange, and chemical reactivity within the interior of molecularly crowded coacervate

micro-droplets, and as such provides a step towards the non-equilibrium functionalization of

synthetic protocells capable of biomimetic operations.

References

(1) Jaffe, L. F. Proc. Natl. Acad. Sci. USA 1966, 56, 1102.

(2) Tyner, K. M., Kopelman, R., Philbert, M. A. Biophys. J. 2007, 93, 1163.

(3) Ojingwa, J. C.,Isseroff, R. R., J. Invest. Dermatol. 2003, 121, 1.

(4)Yin, Y. D., Niu, L., Zhu, X. C., Zhao, M. P., Zhang, Z. X., Mann, S., Liang, D. H. Nature

Communications 2016, 7, 10658

Biography

Page 32: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Dehai Liang (born in 1971) received his BS degree (1994) in

chemistry from Nankai University and PhD degree (2001) from the

State University of New York (SUNY) at Stony Brook in USA.

From 2005, he has been working in the college of chemistry,

Peking Unversity as an assciate professor, and promoted as

Professor in 2012. His research interests include electric field

excitation and non-equilibrium dynamics in protocells, anisotropic

assembly regulated by macromolecular crowding and confinement,

peptide mediated endocytosis of biomembrane, enzyme reaction in

polyelectrolyte complex, and lung-targeting siRNA delivery vehicles. He has published more

than 120 research papers and has authorized 5 patents.

Page 33: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-18

Microwave spectroscopy for chemical kinetics and laboratory

astrophysics

Kyle N. Crabtree

Department of Chemistry, University of California, Davis, Davis, CA 95616 USA

[email protected]

Abstract

Over 200 molecules have been detected to date in the interstellar medium and in

circumstellar shells. Yet despite considerable advances in the capabilities of

astronomical telescopes, a detailed understanding of the formation and destruction of

molecules in space remains elusive. Accurate modeling of astrochemical processes

requires laboratory measurements of molecular spectra and of chemical reactions under

conditions relevant for astrophysical environments. Developments in broadband

microwave technology over the past decade have enabled rotational spectroscopy to

become a highly versatile technique for molecular identification and quantitation in the

gas phase. We have combined a Ka-band chirped-pulse Fourier transform microwave

spectrometer with the uniform supersonic flow generated by a pulsed Laval nozzle to

investigate the kinetics of astrophysically important chemical reactions between

radicals (formed by pulsed laser photolysis of a suitable precursor) and neutral polar

molecules. The current status and prospects of the technique are discussed.

Biography

Kyle Crabtree has been an Assistant Professor at the University of

California, Davis, since 2014. He earned his B.S. in Chemistry

from Ball State University in 2006 and his Ph.D. in Chemistry

from the University of Illinois in 2012. From 2012-2014 he was a

CfA Postdoctoral Fellow at the Harvard-Smithsonian Center for

Astrophysics, where he worked in the laboratory of Dr. Michael C.

McCarthy. His current research involves application of microwave

spectroscopy for studying chemical kinetics of astrochemically

important reactions, developing automated analysis tools for

microwave spectroscopy, and measuring VUV photodissociation of transient diatomic

species for UV photochemical models of the interstellar medium.

Page 34: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-19

Energy Transfer in the X-ray Regime: X-ray Induced Energy Transfer (XIET)

Ting Guo

Department of Chemistry, University of California, Davis, CA 95616

[email protected]

Abstract

In this talk, the results of a systematic theoretical study of a new phenomenon of X-

ray Induced Energy Transfer (XIET) within the purview of X-ray nanochemistry are

presented. X-ray nanochemistry explores utilization of nanostructures for the purpose

of absorbing X-rays to drive actions such as catalytic DNA strand breaks or

polymerization enabled at locations buried deep in opaque objects. XIET occurs

between a strongly X-ray absorbing nanomaterial such as one or more gold

nanoparticles and a weakly X-ray absorbing nanomaterial such as a hollow silica

nanoparticle filled with water; part of the energy absorbed by the former can be

transferred to the latter when the two are positioned sufficiently close together. The

strongly X-ray absorbing nanomaterial which releases energy after X-ray absorption

are called donors and the weakly X-ray absorbing nanomaterial receiving energy from

the donors are called acceptors. XIET related concepts were studied in the past, but in

a more general sense of energy deposition in theoretically defined volumes surrounding

donors, rather than in nanoscale acceptors as explored in this work. The results of

theoretical study of XIET as a function of dimension, composition, configuration and

orientation of donors and acceptors, number of donors, and X-ray energy are given.

Results of relative and percentage XIET efficiencies are discussed. The results

presented in this talk provide a theoretical framework to guide future experimental

XIET studies.

Biography

Professor Ting Guo obtained his Ph.D. in chemistry at Rice

University in 1995. He pursued a postdoctoral training in the

Department of Chemistry at University of California at San Diego.

He joined the faculty of the Department of Chemistry at

University of California, Davis in 1999. Currently he is professor

of Chemistry and Chair of the Department of Chemistry. His

group works on understanding energy flow between molecules

and nanostructures. The main focus of his research is developing nanochemical systems

to harvest X-ray photons and convert the absorbed energy to chemical, optical, electric

energy. Other projects include using fluorescence quenching as sensors, developing

methods to remove water from surface, and delivering genetic content into plants.

Page 35: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-20

Single-Molecule Electrical Detection

Xuefeng Guo*

College of Chemistry, Peking University, Beijing 100871, P. R. China

*[email protected]

Abstract

A universal lithographic methodology for creating single-molecule devices based on

carbon nanomaterials as point contacts has been developed. In this talk, I will detail our

rational bioassay techniques by using molecular bridges with functional side groups

capable of subsequent biocompatible assembly. We have tested this approach in

chemical/biological systems, including DNA hybridization, aptamer-protein interaction,

host-guest interaction, hydrogen-bond dynamics and basic chemical reactions. Because

it is constructed from a single molecule, each device can monitor individual binding

events in real time. This methodology demonstrates a connection between electrical

conduction and chemistry/biology that offers a glimpse into the future of integrated

multifunctional sensors and devices.

Figure 1. Schematic of single-molecule detection using molecular electronic devices.

References:

[1] C. Jia, X. Guo, et al., Science 352, 1443 (2016).

[2] D. Xiang, X, Wang, C. Jia, T. Lee, X. Guo, Chem. Rev. 116, 4318 (2016).

[3] C. Jia, B. Ma, N. Xin, X. Guo, Acc. Chem. Res. 48, 2565 (2015).

[4] X. Guo, C. Nuckolls, et al., Nat. Nanotech. 3, 163 (2008).

[5] X. Guo, Adv. Mater. 25, 3397 (2013).

[6] A. Feldmen, X. Guo, C. Nuckolls, et al., Acc. Chem. Res. 41, 1731 (2008).

[7] X. Guo, P. Kim, C. Nuckolls, et al., Science 311, 356 (2006).

[8] Y. Cao, X. Guo, et al., Angew. Chem. Int. Ed. 51, 12228 (2012).

[9] J. Wang, X. Guo, et al., Angew. Chem. Int. Ed. 53, 5038 (2014).

[10] G. He, J. Li, C. Qi, X. Guo, Angew. Chem. Int. Ed. 55, 9036 (2016).

Page 36: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Biography

Xuefeng Guo received his Ph.D. degree in Organic Chemistry in

2004 from the Institute of Chemistry, Chinese Academy of

Science, Beijing. In 2006, he was awarded the National Top 100

Excellent Ph. D. Thesis Award in China. From 2004 to 2007, he

was a joint postdoctoral scientist at the Columbia University

Nanocenter. He joined the faculty as a professor under “Peking

100-Talent” Program at College of Chemistry and Molecular

Engineering, Peking University in January 2008. In 2012, he won the National Science

Fund for Distinguished Young Scholars in China. His research interests are focused on

single-molecule devices and device physics, flexible/organic electronics, single-

molecule detection and dynamics, etc.

Page 37: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-21

Ultrafast Direct Electron Transfer at Organic Semiconductor and

Metal Interfaces

Wei Xiong

University of California- San Diego, 92093

[email protected]

Abstract

In this talk, I will give an overview of a few state-of-the-art ultrafast nonlinear

spectroscopy works in my group, spanning from model electrochemical catalysis,

optoelectronic devices to novel molecular photonic materials. I will particularly focus

on a recent study on ultrafast direct interfacial charge transfer. The ability to control

direct electron transfer can facilitate the development of new molecular electronics,

light-harvesting materials and photocatalysis. However, it has been rarely reported and

the molecular conformation-electron dynamics relationships remain unclear. Here, we

describe direct electron-transfer at buried interfaces between an organic polymer

semiconductor film and a gold substrate, by observing the first dynamical electric-field-

induced vibrational sum frequency generation (VSFG). In transient electric-field-

induced VSFG measurements on this system, we observe dynamical responses (<150

fs) that depend on photon-energy and polarization, evidencing that electrons are directly

transferred from Fermi level of gold to LUMO of organic semiconductor. Transient

spectra further reveal that, although the interfaces are prepared without deliberate

alignment control, a sub-ensemble of surface molecules can adopt conformations for

direct electron transfer. DFT calculations support the experimental results and ascribe

the observed electron transfer to a flat-lying polymer configuration in which electronic

orbitals are found to be delocalized across the interface. The present observation of

direct electron transfer at complex interfaces as well as the insights gained into the

relationship between molecular conformations and electron dynamics will have

implications for implementing novel direct electron transfer in energy materials.

References:

1. B. Xiang, Y. Li, C.H. Pham, F. Paesani, W. Xiong, “Ultrafast Direct Electron Transfer at

Organic Semiconductor and Metal Interfaces”, Science Advances 2017, 3: e1701508.

Page 38: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Biography

Wei Xiong is an assistant professor of Chemistry and Biochemistry

at University of California- San Diego. He received his B.S.

degree in Chemistry from Peking University in 2006, then his Ph.D.

degrees in Chemistry from University of Wisconsin-Madison in

2011, under the supervision of Prof. Martin t. Zanni. Since 2011,

he was a postdoctoral researcher in the Kapteyn-Murnane group, at

JILA, University of Colorado-Boulder. Wei joined the Department

of Chemistry and Biochemistry at UCSD at 2014. Wei is a

recipient of prestigious awards including 2015 DARPA YFA, 2016 AFOSR YIP, and

2017 DARPA Director’s Fellowship. His research focuses on developing novel ultrafast,

interfacial sensitive, optical spectroscopies and microscopies, in order to both space-

and time-resolve charge and molecular dynamics in complex materials and biological

interfaces. Lab website: http://ultrafast.ucsd.edu.

Page 39: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-22

Probing interfacial water at submolecular level by scanning probe microscopy

Ying Jiang*

International Center for Quantum Materials, Peking University, Beijing, 100871, P.

R. China

*[email protected]

Abstract

Interfacial water is ubiquitous in nature and plays an essential role in a broad spectrum

of physics, chemistry, biology, energy and material sciences. One of the most

fundamental issues is the characterization of H-bonding configuration formed on

surfaces and H-atom transfer through hydrogen bonds. Ideally, attacking this problem

requires the access to the internal degrees of freedom of water molecules, i.e. the

directionality of OH bonds. However, it remains a great challenge due to the small size

of hydrgen. In this talk, I will present our recent progress on the development of new-

generation scanning probe microscopy/spectroscopy (SPM/S) with ultrahigh sensitivity

and resolution, and its application to surface water. I will foucus on how to achieve

submolecular-resolution imaging [1,2] and single-bond vibrational spectroscopy [3] of

single water molecules via controlling tip-water coupling. Those technical advances

provide us unprecedented opportunity to identify the topology of H-bonding

configuration [4], track the proton dynamics [5], and assess quantitatively the nuclear

quantum effects (NQEs) of H bond [3,5]. The submoleuclar-level studies of ion

hydrates and two-dimensional ice structures will be also briefly introduced in the end.

References

1. J. Guo, X. Z. Meng, J. Chen, J. B. Peng, J. M. Sheng, X. Z. Li, L. M. Xu, J. R.

Shi, E. G. Wang*, Y. Jiang*, Nature Materials 13, 184 (2014).

2. J. Peng, J. Guo, P. Hapala, D. Cao, R. Ma, B. Cheng, L. Xu, M. Ondráček, P.

Jelínek*, E. G. Wang*, and Y. Jiang*, Nature Communications 9, 122 (2018).

3. J. Guo, J.-T. Lü, Y. Feng, J. Chen, J. Peng, Z. Lin, X. Meng, Z. Wang, X.-Z. Li*,

E.-G. Wang* and Y. Jiang*, Science 352, 321 (2016).

4. J. Chen, J. Guo, X. Z. Meng, J. B. Peng, J. M. Sheng, L. M. Xu, Y. Jiang*, X. Z.

Li*, E. G. Wang, Nature Communications 5, 4056 (2014).

5. X. Meng, J. Guo, J. Peng, J. Chen, Z. Wang, J. R. Shi, X. Z. Li, E. G. Wang*, Y.

Jiang*, Nature Physics, 11, 235 (2015).

Page 40: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Biography

Ying Jiang received his Bachelor’s degree from Beijing Normal

University in 2003 and his PhD from Institute of Physics,

Chinese Academy of Sciences (CAS) in 2008. He has been a

visiting scientist in Forschungszentrum Jülich GmbH in

Germany (2006-2007). After working as a Postdoctoral

Associate in University of California, Irvine (2008-2010), he

joined International Center for Quantum Materials, Peking University as a tenure-track

assistant professor. He was promoted to associate professor with tenure in 2016 and full

professor in 2018. He has published over 30 peer-reviewed papers, including 2 in

Science and 6 in Nature Journals. He has delivered over 40 invited talks (including 5

plenary talks) in a number of international conferences. He was awarded Outstanding

Young Scientist (2012), Cheung Kong Young Scholar (2016), Emerging Leader (IOP,

2016), Distinguished Young Scholars of NSFC (2017). His research works were

selected as Top-ten Progresses of Science and Technology of China (2016) and Top-ten

Progresses of Basic Research of China (2017). He is an expert in advanced scanning

probe microscopy and spectroscopy. His current interests are focused on the atomic-

scale properties and ultrafast dynamics in single molecules and low-dimensional

materials.

Page 41: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-23

New Advances in 3D Nanoprinting

Gang-yu Liu

Department of Chemistry, University of California, Davis, California 95616, United States

[email protected]

3D printing has been a very active area of research and development (R&D) in the context of

additive manufacture, due to its capability to produce 3D objects by design. Current 3D nanoprinting

technology pushes the spatial limit to micrometer scale. Further miniaturization represents a major

challenge in current R&D effort in 3D printing. This work reports new advances in miniaturizing

3D printing to nanometer scale using scanning probe microscopy in conjunction with local material

delivery such as nanofluidics.[1] Using various materials, the concept of layer-by-layer nanoprinting

by design have been demonstrated.[1-2] Nanometer precision is achieved in all three dimensions,

as well as in inter-layer registry, as shown in Figure 1. The approach and results provide a new and

general platform for conducting scientific research in designed 3D nano-environments, as well as

enabling production of new nanomaterials and scaffolds for photonics, devices, biomedicine and

tissue engineering.[3-4]

Figure 1. An atomic force microscopy

based 3D nanoprinting using a

nanofluidic probe (A). The

dendrimers self-assembled into

nanoline arrays with carters (B), while

star-polymers form arrays of bamboos. The former represents weak inter-molecular interaction,

while the later represents strong interaction.

References:

1. Zhao, J.; Swartz, L.; Lin, W. F.; Schlenoff, P.; Frommer, J.; Schlenoff, J.; Liu,

G. Y. 3D Nanoprinting via Scanning Probe Lithography in Conjunction with

Layer-by-Layer Deposition, ACS Nano 2016, 10, 5656−5662.

2. Ventrici de Souza, J.F., Y. Liu, S. Wang, P. Dorig, T. Kuhl, J. Frommer and G.-y.

Liu. Three-Dimensional Nanoprinting via Direct Delivery. J. Phys. Chem. B.,

2018, In press.

3. Li, J. R.; Ross, R. S.; Liu, Y.; Liu, Y. X.; Wang, K. H.; Chen, H.-Y.; Liu, F. T.;

Laurence, T. A.; and Liu, G. Y. Engineered Nanostructures of Haptens Lead to

Unexpected Formation of Membrane Nanotubes Connecting Rat Basophilic

Leukemia Cells, ACS Nano, 2015, 9, 6738–6746.

4. Deng, Z., I.C. Weng, J.R. Li, H.Y. Chen, T.T. Liu and G.Y. Liu. Engineered

Nanostructures of Antigen Provide an Effective Means for Regulating Mast Cell

Activation. ACS Nano, 2011, 5(11), 8672–8683.

Page 42: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Biography:

Gang-yu Liu received her Ph.D. from Princeton

University in 1992. Following a two-year

postdoctoral research at University of California,

Berkeley, under a Miller Research Fellowship, she

became an assistant professor at Wayne State

University, where she received a tenure in 1999. In

2001, she joined the Chemistry Department,

University of California, Davis. She has received

several prestigious awards, including an ACS Fellow

in 2010, AAAS Fellow in 2007, Sloan Faculty

Recognition Award in 2007, NSF-CAREER Award

(1997), Arnold and Mable Beckman Young

Investigator Award (1996-1998), and the Camille and Henry Dreyfus New Faculty Award (1994-

1999). She has been a senior editor for the J. Phys. Chem. since 2005. She serves on editorial

advisory boards for ACS Nano, (2007-Present) and ACS Applied Nanomaterials. (2017-present).

Her research focuses on advanced technology development for 3D nanoprinting, bioimaging, and

applications in biomedical research.

Page 43: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-24

Hybrid Voltage Indicators for Imaging Neural Activity

Peng Zou*

College of Chemistry, Peking University, Beijing, 100871, P. R. China

*[email protected]

Abstract

Membrane voltage is an important biophysical signal. Optical mapping of membrane voltage

enables investigation of electrical signaling at high spatial resolutions and with high throughput.

In this talk, I will describe a recently developed fluorescent voltage indicator scaffold (Flare1)

that builds upon the site-specific modification of microbial rhodopsin with organic fluorophores.

Flare1 achieved 36% ΔF/F per 100 mV voltage change with sub-millisecond response kinetics,

thus representing one of the most sensitive and fastest orange-colored voltage indicators. This

technique has enabled observation of long-range electrical coupling among mammalian cells

that was mediated via gap-junctions. Combining the superior brightness and photostability of

small molecules with genetic targeting of microbial rhodopsin proteins, this design strategy can

be extended for developing novel fluorescent indicators.

References

(1) Y. Xu, P. Zou*, A. E. Cohen*. Curr. Opin. Chem. Biol. 2017, 39, 1-10.

(2) P. Zou#, Y. Zhao#, A. D. Douglass, D. R. Hochbaum, D. Brinks, C. A. Werley, D. J. Harrison,

R. E. Campbell, A. E. Cohen. Nat. Commun., 2014, 5, 4625.

Biography

Peng Zou is currently an Assistant Professor at the Department of

Chemical Biology, College of Chemistry and Molecular

Engineering of Peking University (PKU). He received his

Bachelor’s degree in Chemistry and in Physics from PKU in 2007,

and his PhD in Biological Chemistry (with Alice Ting) from MIT

in 2012. He was a postdoc fellow at Harvard University (with

Adam Cohen) from 2013 to 2015, before returning to PKU to start

his faculty appointment. He is affiliated with the Synthetic and

Functional Biomolecules Center, Peking-Tsinghua Center for Life Sciences and the PKU-

IDG/McGovern Institute for Brain Research as Principle Investigators. His research focuses on

developing chemistry-enabled tools for studying the structure, dynamics, and function of

neurons.

Page 44: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

IL-25

Chemistry of atmospheric particles

Peter B. Kelly

Department of Chemistry, UC Davis, Davis, CA 95616

[email protected]

Abstract

Aerosols collected in Oslo with an aerodynamic size below 2.5 µm were

gravimetrically weighed to acquire mass concentrations and analyzed by Accelerated

Mass Spectrometry to separate the particulate bound carbon as biogenic or fossil

derived. Results were compared to levoglucosan measurements and were associated

with meteorological factors, human population behavior patterns and diurnal variations.

Overall colder temperatures lead to higher concentrations of particle bound carbon and

the biogenic fraction nearly doubles as the temperature is lowered and inversion layers

are formed compared to the fossil carbon levels. BC had the highest linear correlation

coefficient with temperature indicating the strong temperature dependence of aerosol

mass from wood burning. Non-carbon species were not linearly dependent on

temperature. 12C/14C isotopic analysis of PM2.5 gave on average a biogenic carbon

fraction of 20 +/- 5 %, which is estimated to equal 43 - 53 % total wood burning

contribution. The conversion factor between BC mass and the total wood burning mass

was estimated to be between 2.1 – 2.4. At night all the aerosol fractions are linearly

dependent on the average temperature and during the day the relationship is non-linear.

Radiocarbon and levoglucosan measurements measured in Oslo during the sampling

period agree well. Further examination of the linear correlation between decreasing

temperature and carbon revealed that total carbon concentrations for each sample could

be modeled as a function of the hours below -4 oC as a critical temperature reflecting

all the parameters playing a part in aerosol formation in Oslo during the winter.

Biography

Prof. Peter B. Kelly graduated from Dartmouth College Cum Laude in

1976. Prof. Kelly received his PhD from the Pennsylvania State

University in 1981. He joined Prof. Herschel Rabitz and Prof. Richard

Miles at Princeton University as a post-doctoral researcher. In 1983 he

joined the research effort of Prof. Bruce S. Hudson at the University of

Oregon. Prof. Kelly joined the faculty at UC Davis in 1986. His

research interests focus on spectroscopy of small organic radicals,

analysis of combustion species, carbon-14 analysis methodology, and atmospheric chemistry.

Page 45: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

General Information

CONFERENCE VENUE

CCME Central Multifunctional Room, College of Chemistry and Molecular

Engineering, Peking University

北京大学化学与分子工程学院 中区多功能厅

PRESENTATIONS

• The conference will be equipped with (1) window notebook with Microsoft

PowerPoint and Adobe Acrobat Reader, (2) LCD projector, (3) Laser pointer.

• Time Limit

Each presentation time indicated on the Program includes speech (~15 min) and Q&A

session (~10 min). Each student’s elevator pitch presentation is 3 min.

Please have a strict time control on your speech.

HOTEL INFORMATION

北京大学中关新园

Name: Zhongguanxinyuan Global Village of Peking University

Address: No. 126 North Zhongguancun Road, Hai Dian, 100871 Beijing, China

Phone: +86-10-62752288

EMERGENCY CONTACT

Prof. Wen-Bin Zhang Mobile: +86-13810312322

Dr. Guangzhong Yin Mobile: +86-13811992131

Page 46: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Direction to walk from the hotel to the meeting room:

Page 47: Global Frontiers in Chemistry and Chemical Biologychemgroups.ucdavis.edu/~liu/10+10/2018/10+10 Program.pdf · 2018-05-14 · Global Frontiers in Chemistry and Chemical Biology Beijing,

Acknowledgements

We appreciate the funding supporting from the following agencies:

(1) The 111 project;

(2) ICAM;

(3) College of Chemistry and Molecular Engineering, Peking University;

(4) Center for Soft Matter Science and Engineering, Peking University;

(5) Daddy’s Choice Company.


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