2021 ACA Annual Meeting Scientific Program

The scientific program features experts from all regions of the world (please note that all times are EDT). Click on the title for information regarding the session as well as the submitted abstracts. Sessions in the abstract system are listed as ending at 3:00 PM EDT however there will be approximately one half hour at the end of the presentations for discussion.

Registered attendees will have access to the full schedule, list of abstracts and zoom links prior to the start of the conference.

Please note that this schedule is tentative and subject to change. Changes, if necessary, will be updated on this page.

To view the schedule on the ACA calendar click HERE.
 

DAY ONE: Friday, July 30, 2021

T1 PDB 50th
Friday, 7/30/2021 @ 12-3:30 PM EDT

Chair(s): Stephen Burley & David Rose

Sponsored by:

 

YSIG Speed Mentoring Session
Friday, 7/30/2021 @ TBD

 Sponsored by:


DAY TWO: Saturday, July 31, 2021

T2 PDB 50th
Saturday, 7/31/2021 @ 11:00 AM - 3:30 PM EDT

Chair(s): Stephen Burley & David Rose

Sponsored by:

 

1.1.4 Total Scattering: New Insights in Condensed Matter
Saturday, 7/31/2021 @ 12-3 PM EDT
Chair(s): Matt Tucker & Peter Metz
Sponsoring SIG: M/N/P

While crystallography has traditionally dealt with the average, periodic arrangement of atoms in condensed matter, it has long been acknowledged that deviation from ideality is critically important to understanding macroscopic material phenomena. As atomic structure characterization tools have continued to mature, an increasing body of work has accumulated documenting locally perturbed atomic environments, even in materials of nominally high average symmetry. These studies are often complemented by spectroscopy and microscopy methods to confer a nuanced understanding of materials behavior and inform the materials science paradigm.

Beyond the classical examples of diffuse scattering, total scattering and the pair distribution function have been fruitfully applied to numerous contemporary materials science problems, including: ferroic materials, catalysts, strongly correlated electron systems, energy storage materials, as well as bulk/nanoscale variations on each theme.

New experimental techniques have also advanced local structure methodologies, particularly regarding advancements in grazing incidence X-ray PDF measurements of thin films, and advancements in the quantitative treatment of electron PDF data.

This symposium invites discussion of contemporary scientific developments enabled by local structure investigations of condensed matter.


1.1.3 Microcrystal Electron Diffraction
Saturday, 7/31/2021 @ 12-3 PM EDT
Chair(s): Tamir GonenXiaodong Zou 
Sponsoring SIG: Small Molecule 
Co-Sponsoring SIGs: Bio, Cryo EM, General Interest, Service

The field of microcrystal electron diffraction has rapidly progressed. Recent advances have placed microED at the forefront of structure determination. Several experimental protocols exist that describe the process of sequential sampling of diffraction patterns from nanometer-sized crystals while a sample is tilted in a transmission electron microscope. This session will be focused on advances in software/hardware and discussion of the results from microED experiments.

Sponsored by:

            


1.1.1 General Interest 1
Saturday, 7/31/2021 @ 12-3 PM EDT
Chair(s): Marc Giulanotti & Brandon Mercado
Sponsoring SIG: General Interest

General Interest sessions are the forum for topics of broad interest to the crystallographic community or for presentations that do not fit the specific theme of other sessions. All presentations are selected from submitted abstracts.

 

1.1.2 Mapping Free Energy Landscapes of Molecular Machines
Saturday, 7/31/2021 @ 12-3 PM EDT
Chair(s): Kara Zielinski & Kevin Dalton
Sponsoring SIG: SAS
Co-Sponsoring SIGs: Young Scientist, Bio, Cryo-EM, Light Sources

X-ray scattering, cryo-EM, NMR, and diffraction experiments probing macromolecular structure away from energy minimum, i.e. by perturbing or exploring free energy landscape (t-jump, electric field, pressure, mixing, etc).

Invited speakers:
Suraj Pandey, University of Wisconsin - Milwaukee, USA
Michael Thompson, University of California - Merced, USA
Lewis Kay, University of Toronto, CA

 Sponsored by:

 

2.2.3 Economics of Crystallography
Saturday, 7/31/2021 @ 12-3 PM EDT
Chair(s): Lee Daniels & Amy Sarjeant
Sponsoring SIG: Service
 

Scientists cannot escape the restraint imposed by the cost of their research. This half-day session examines the past, current and future states of funding and profit in the world of structural science. The organizers encourage input from academia, industry, government and non-profit agencies in order to clarify the present and future of our science. Topics may include: How does funding drive the need and availability of crystallographic results? Why support crystallography? Funding a service lab, and justifying the cost. How does a contract research lab make the service economically feasible? Pharmaceuticals: What are the costs of exploring salts, co-crystals and polymorphs? What are the risks of NOT producing solid crystalline products?


Poster Session I
Saturday, 7/31/2021 @ 4-5 PM EDT

 


DAY THREE: Sunday, August 1, 2021

ETTER AWARD: Julia Zaikina
Sunday, 8/1/2021 @ 11AM - 12 PM EDT
Chair(s): David Rose


4.2.3 Sample Prep for Cryo-EM and Crystallography
Sunday, 8/1/2021 @ 12-3 PM EDT
Chair(s): Edward Pryor
Sponsoring SIG: Cryo EM
Co-Sponsoring SIG: Best Practices

With the technological advancements in both X-ray crystallography and Cryo-EM, structural biology techniques are becoming readily accessible to all labs. Although we are witnessing many significant strides in this field, preparation of high-quality samples still remains as one of the main bottleneck for both methods. In this session we will highlight the latest sample preparation methods, techniques, and best practices for both crystallography and Cryo-EM single particle, tomography, and micro-ED workflows.  

 

1.2.1 Instrumentation for Time-Resolved Experiments
Sunday, 8/1/2021 @ 12-3 PM EDT
Chair(s): Robert Henning & Gisela Brändén
Sponsoring SIG: Light Sources

Time-resolved crystallography utilizes the bunch structure of the X-ray source to probe the structural dynamics over a range of time scales (femtoseconds to seconds). This requires highly specialized instrumentation that can take advantage of these unique sources, as well as purpose-build serial crystallography setups. This session will focus on the current & future instrumentation and experimental setups that are needed at synchrotrons and XFELs to do these types of experiments. 

Sponsored by:

 

2.3.1 Open Exchanges in Crystallographic Education
Sunday, 8/1/2021 @ 12-3 PM EDT
Chair(s): Andrew Torelli & Kraig Wheeler
Sponsoring SIG: General Interest

Crystallographic education is vital to every aspect of our profession from the training of current and next generation scientists to the potential for shaping public perceptions. This session offers an informal platform for speakers to communicate their approaches and techniques that promote the learning process of crystallography. The short format of this session (10 minute talks) will encourage speakers and attendees to freely share ideas on focused topics that range from innovative hands-on exercises, virtual resources, and novel must-have classroom modules.


1.2.2 Materials for Sustainability and Energy
Sunday, 8/1/2021 @ 12-3 PM EDT
Chair(s): Cheng Li 
Sponsoring SIG: M/N/P

Crystallography lays the foundations for understanding the structure-property relationship of functional materials for energy and sustainability. Design and optimization of materials for energy conversion and storage technologies, such as batteries, fuel cell, thermoelectrics and solar cell, relies upon insight of the crystal structure. This session will cover the latest development in the cross disciplinary fields of crystallography and materials science, so as to provide a discussion on the recent advance in the structural studies. 

 

1.2.4 Redox Enzymes by Multiple Approaches
Sunday, 8/1/2021 @ 12-3 PM EDT
Chair(s): Flora MeilleurJennifer Bridwell-Rabb
Sponsoring SIG: Biological Macromolecules

Redox enzymes are highly susceptible to radiation damage. Mitigation of X-ray induced perturbations of their metal centers or redox cofactors is key to structural investigation of their catalytic mechanisms. This session will discuss results from time resolved synchrotron, XFEL, and neutron crystallography as well as those from complementary techniques such as small angle scattering and computational calculations.


1.1.1 General Interest 2
Sunday, 8/1/2021 @ 12-3 PM EDT
Chair(s): Marc Giulanotti & Brandon Mercado
Sponsoring SIG: General Interest

General Interest sessions are the forum for topics of broad interest to the crystallographic community or for presentations that do not fit the specific theme of other sessions. All presentations are selected from submitted abstracts


Poster Session II
Sunday, 8/1/2021 @ 4-5 PM EDT

 


DAY FOUR: Monday, August 2, 2021

BUERGER AWARD: Wah Chiu
Monday, 8/2/2021 @ 11AM - 12 PM EDT
Chair(s): David Rose


2.1.3 Latest Software Developments in CRYO-EM
Monday, 8/2/2021 @ 12-3 PM EDT
Chair(s): Charles Sindelar & Peijun Zhang
Sponsoring SIG: Cryo EM

This session will highlight recent developments in cryo-EM software for image processing and structure analysis, including topics such as: on-the-fly processing pipelines; higher resolution single-particle and tomographic structure determination; heterogeneity analysis; 3D reconstruction in situ; molecular modeling from density maps; and micro-electron diffraction for crystallographic structure determination.


2.1.5 Rosalind Franklin: 101st Anniversary
Monday, 8/2/2021 @ 12-3 PM EDT
Chair(s): Elspeth Garman & Joseph Orgel
Sponsoring SIG: BioMac
Co-Sponsoring SIG: Fiber

It is 101 years since the birth of Rosalind Franklin, famous for her part in defining the structure of DNA. However, this achievement constituted only a small part of her scientific output in a career that was sadly cut short due to her untimely death at the age of 37.

In this session, we will explore her foundational contributions to X-ray diffraction methods and crystallographic approaches. This is in addition to her role in advancing our understanding of the chemistry of coal, of the structure of DNA and of the three-dimensional arrangements of viruses.


2.1.4 Magnetic Structure Determination: Advances and Applications
Monday, 8/2/2021 @ 12-3 PM EDT
Chair(s): Huibo Cao & William Ratcliff
Sponsoring SIG: M/N/P

Magnetic symmetry is key to understanding and designing many quantum and topological properties in materials such as superconductors, quantum spin liquids, spin ices, topological insulators, chiral magnets, and skyrmions. The session will focus on various ideas on how to understand and design quantum and topological materials through magnetic and structural symmetries. We also welcome advanced magnetic and quantum characterization methods to enliven our discussions.

Invited Speakers:
Alan Tennant (ORNL), USA
Zhiling Dun, Georgia Institute of Technology
Erxi Feng (ORNL), USA
Ni Ni (UCLA), USA 

2.1.1 Evolving Enzymes
Monday, 8/2/2021 @ 12-3 PM EDT
Chair(s): Audrey Burnim & Ben Clifton
Sponsoring SIG: SAS
Co-Sponsoring SIG: Young Scientist

Evolving Enzymes: A session encompassing reconstructed (ancient) enzymes, directed evolution of synthetic functions, and structural biology with evolutionary context.

Invited Speakers:
Nozomi Ando, Cornell University, USA
Mike Harms, University of Oregon, USA
Colin Jackson, Australian National University, Australia
Paola Laurino, Okinawa Institute of Science and Technology, Japan
Emily Parker, Victoria University of Wellington, New Zealand
 

4.1.4 Large-Scale Facility Upgrades
Monday, 8/2/2021 @ 12-3 PM EDT
Chair(s): Ana Gonzalez, John Chrzas & Bryan Chakoumakos
Sponsoring SIG: Light Sources

Large scale light and neutron sources must undergo upgrades in order to satisfy users requirements and to remain competitive in response to the development of new state of the art sources. This session will report on some of the recently achieved and planned upgrades, the challenges to overcome and the new experimental possibilities that these projects enable in the field of diffraction based applications.

Sponsored by:
Invited Speakers:
Andy Aquila SLAC National Accelerator Laboratory
Yaohua Liu ORNL
Uta Ruett ANL
Daniele de Sanctis ESRF


4.2.5 Structure-based Drug Design
Monday, 8/2/2021 @ 12-3 PM EDT
Chair(s): Anna Gardberg & Elizabeth Sprague
Sponsoring SIG: Industrial
Co-Sponsoring SIG: Bio

"In this session we will feature applications of structural biology methods to drug discovery. Possible topics may include structure/function studies to inform drug discovery, hit validation, lead optimization challenges and fragments with a particular interest in examples involving a variety of techniques (e.g. x-ray, NMR, EM, in silico, biophysics, etc). Technology or methods development in these areas is also of interest. "

Sponsored by:

     


Poster Session III
Monday, 8/2/2021 @ 4-5 PM EDT

 

Virtual Zoom Piano Concert
Monday, 8/2/2021 @ 5:15 PM ET - 6:15 PM ET

Join the ACA and our members as we gather to hear and partake in a virtual piano concert by ACA member Connie Rajnak.  The musical program can be found HERE.  

 

 


DAY FIVE: Tuesday, August 3, 2021

WARREN AWARD: Jacqueline Cole
Tuesday, 8/3/2021 @ 11AM - 12 PM EDT
Chair(s): David Rose

 

2.2.5 What Can & Can't We See Reliably at Resolution X?
Tuesday, 8/3/2021 @ 12-3 PM EDT
Chair(s): Jane Richardson & Nigel Moriarty
Sponsoring SIG: Cryo EM
Co-Sponsoring SIG: Bio

Most structural biologists are familiar with what features can be seen in x-ray crystal structures of proteins in the commonest range around 2Å resolution, and have sometimes been frustrated by what we cannot see at all clearly at 3Å or worse.  This session will emphasize both new studies about similarities and differences for cryo-EM (or even neutron diffraction), and also new methods that can now let us do better than expected in some cases.


2.2.1 AI, Machine Learning, and Data Science Approaches in Crystallography
Tuesday, 8/3/2021 @ 12-3 PM EDT
Chair(s): Thomas Proffen
Sponsoring SIG: M/N/P

Advances in machine learning (ML) and artificial intelligence (AI) are already having a revolutionizing impact in many areas such as image, speech recognition or advancing self-driving cars. These techniques are starting to have an impact in materials science and beyond. This session will provide an overview of the impact of AI, ML and related methods are having on the field of crystallography now and in the future.


2.2.4 Membrane Protein Structure in Membrane and Membrane-mimic Environments
Tuesday, 8/3/2021 @ 12-3 PM EDT
Chair(s): Kushol Gupta & Venky Pingali
Sponsoring SIG: SAS

Membrane proteins play a critical role in numerous cellular-related functions such as cell-cell signaling, molecular transport through membranes, and the anchoring of the cytoskeleton. Therefore, elucidation of membrane protein structure is essential to the understanding of their function. However, membrane proteins are not stable in aqueous buffer solutions without a stabilizing vehicle such as lipid membranes, surfactant micelles, bicelles, and even non-natural polymers. This session will present research catering to the various membrane and membrane-mimic environments employed for the study of membrane proteins, as well as the methodologies developed to expand the frontiers of the study of membrane protein structure and function.

Sponsored By:

           

 

     

Invited Speakers:
Kaitlyn Ledwitch, Vanderbilt University, USA
Anne Martel, Institut Laue-Langevin, France
David Hoogerheide, National Institute of Standards and Technology, USA
Rana Ashkar, Virginia Tech, USA
 


2.2.2 Computing & Data Management
Tuesday, 8/3/2021 @ 12-3 PM EDT
Chair(s): Herbert J Bernstein & Dale Kreitler
Sponsoring SIG: Best Practices
Co-Sponsoring SIG: Bio

This is a half day session on Computing and Data Management (CDM) with talks relating to useful methods in computing and data management (not just nice results) as a companion to another half day session on Meeting the Challenges of Raw Data Management (MCRD).

CDM will focus on methods now coming to the fore in solving crystallographic structures, including advances in improving and speeding up crystallographic pipelines, advances in using models and AI in starting and managing the solution process, advances in disaggregating data from multiple conformations and states, advances in integrating results from multimodal experiments across multiple scales, etc.


4.1.2 Cool Structures
Tuesday, 8/3/2021 @ 12-3 PM EDT
Chair(s): Nichole Valdez & Steven Kelly
Sponsoring SIG: Small Molecule

This session aims to both highlight interesting structures of small molecules (<100 atoms per molecule) and bring to the foreground the science enabled by small-molecule structure analysis. Speakers will be selected from contributed abstracts. Submissions from students are encouraged.


4.1.5 Structural Biology of Infectious Diseases
Tuesday, 8/3/2021 @ 12-3 PM EDT
Chair(s): George Lountos & Jason Mclellan
Sponsoring SIG: Biological Macromolecules
Co-Sponsoring SIGs: Cryo-EM and Industrial

This session will focus on the structural basis of host–pathogen interactions and the application of structural biology to combat infectious diseases. Possible topics include, but are not limited to, structural studies on viral, bacterial, and fungal proteins and their mechanisms of action or interactions with host cell molecules, receptors, and antibodies. Structure-based vaccine and antibody development is also of interest.


Poster Session IV
Tuesday, 8/3/2021 @ 4-5 PM EDT

 


DAY SIX: Wednesday, August 4, 2021

CANCELLED: 3.1.3 PXRD with Multimodal and Multidisciplinary Approaches
Wednesday, 8/4/2021 @ 12-3 PM EDT
Sponsoring SIG: M/N/P

 

Corporate Member Webinar 

New Data Updates, Subsets and Educational Tools from the Cambridge Crystallographic Data Centre (CCDC)

Wednesday, 8/4/2021 @ 10-10:30 AM EDT
Contact: Yinka Olatunji-Ojo

This webinar will discuss the latest updates from the CCDC, including database and software updates and new education and outreach efforts. We’ll present new subsets (like the MOF collection and Covid-19 subset), changes in the underlying database architecture and new partnerships. In addition, we have created new robust, online education tools to meet the needs of our user base. From home-friendly science festival activities to training videos and finally hands-on virtual training sessions that are easy to follow and engaging.

 

2.2.6 Economics of Crystallography
Wednesday, 8/4/2021 @ 12-3 PM EDT
Chair(s): Lee Daniels & Amy Sarjeant
Sponsoring SIG: Service

Scientists cannot escape the restraint imposed by the cost of their research. This half-day session examines the past, current and future states of funding and profit in the world of structural science. The organizers encourage input from academia, industry, government and non-profit agencies in order to clarify the present and future of our science. Topics may include: How does funding drive the need and availability of crystallographic results? Why support crystallography? Funding a service lab, and justifying the cost. How does a contract research lab make the service economically feasible? Pharmaceuticals: What are the costs of exploring salts, co-crystals and polymorphs? What are the risks of NOT producing solid crystalline products?

 

3.1.5 What I Learned from My First Structures
Wednesday, 8/4/2021 @ 12-3 PM EDT
Chair(s): Silvana Urcia-Romero & Larry Falvello
Sponsoring SIG: Service
Co-Sponsoring SIG: Small Molecule

This session aims to trace the development of the methodologies used in structure analysis in terms of the techniques applied by different generations of crystallographers. This will provide a developmental context for the technology, techniques and practices used today. The skills learned by each one of us for our first structure analyses serve as a time stamp for the starting point of our work in crystallography. The continual improvement of these techniques is chronicled by the changing practices in X-ray structure analysis. A high level of technical involvement by the user decades ago, and the accompanying imperative for the user to perfect all details of the results to the extent possible, have receded with the evolution of automated rapid-throughput analyses accompanied by quality control in the form of computerized validation. At the same time, analyses that were considered unfeasible years ago, involving twinning, modulation, ab-initio powder diffraction analysis and others, can be undertaken with relative ease today. That evolution of techniques and tools has also transformed the user's educational point of view, changing the emphasis in training from technical acuity with instrumentation, software, and fundamental crystallography itself, to a stronger focus on the results and their implications in a broader scientific context. Presentations will outline what has been achieved so far by past and present generations, including reference to fundamental details that are no longer considered explicitly. Submissions are welcome from all experience levels.

Sponsored by:


3.1.1 Advances in Detector Technology
Wednesday, 8/4/2021 @ 12-3 PM EDT
Chair(s): Joseph Ferrara & Christopher Russo
Sponsoring SIG: Cryo EM
Co-Sponsoring SIG: Best Practices

The detection of X-rays, neutrons, and electrons for diffraction and imaging techniques has changed dramatically over the last 20 years. This half-day session will explore the most recent advances in detector technology as they apply to imaging and diffraction techniques.

Sponsored by:

              

 

3.1.2 Complementarity Among Structural Methods
Wednesday, 8/4/2021 @ 12-3 PM EDT
Chair(s): Carlos Escalante 
Sponsoring SIG: Biological Macromolecules
Co-Sponsoring SIGs: General Interest, M/N/P, Small Molecule

Recent advances in many structural biology techniques are allowing the study of more complex structures that were previously intractable. Moreover, the complementary of information provided by different techniques provides a better justification of the structure as it may integrate the static and dynamic information of a particular system. The aim of this session to present recent examples where a combination of techniques such as X-ray crystallography, SAXS, NMR spectroscopy, Cryo-Electron Microscopy among others, has been used successfully to tackle complex and dynamic structures of biological importance.


4.2.4 Self Assembly in Soft Matter Systems
Wednesday, 8/4/2021 @ 12-3 PM EDT
Chair(s): Tom Fitzgibbons & Volker Urban
Sponsoring SIG: SAS

Polymeric systems that are covalently bonded that exhibit poor compatibility will often self-assemble in ways to minimize the free energy of the system. This can occur in solution or though through a drying process towards the solid state. The self assembled structures play a key role in many applications ranging from lithography in electronic materials and nanotemplating to drug delivery vehicles and emulsion stabilization. Small angle X-ray and neutron scattering provide unique insight to the self assembled structures of block compolymers and amphiphilic. Advances in small angle scattering along with the accompanying modeling efforts have accelerated work in this field by providing insight into TH structures and phase transitions that occur in these systems. In this session, we will bring together experts in both experimental and modeling efforts associated with describing the self-assembly of polymeric systems and their associated phase transitions.


4.2.2 Meeting the Challenges of Raw Data Deposition
Wednesday, 8/4/2021 @ 12-3 PM EDT
Chair(s): John Rose & Wladek Minor
Sponsoring SIG: Best Practices
Co-Sponsoring SIG: Bio

The ability reproduce experimental results (the basis of a publication or other scholarly work) strongly relies on the availability of primary experimental data. The Structural Biology community recognizes this and has encouraged the sharing of research data since its birth.

Today, the importance of archiving the raw data (the images and their associated metadata) leading to a structure has come to the forefront as reflected by the work of the IUCr and the ACA in this area. In addition, funding agencies are particularly interested in the reproducibility of the work they fund.

The speakers in the session will describe the crucial role that diffraction data may play in providing raw data needed for improving data reduction software leading to better structures, the re-determination of suboptimal macromolecular structures to improve structure quality and providing a reproducible platform for extending these analyses by future investigators.


Marilyn M. Olmstead Memorial Session
Wednesday, 8/4/2021 @ 4-5 PM EDT

This session will honor the memory of Prof. Marilyn M. Olmstead and celebrate her extraordinary contributions to the field of X-ray diffraction. A longtime active member of the ACA, a perennial meeting attender, and a constant organizing force, Prof. Olmstead was a builder of networks and a champion of those without access to traditional resources. She mentored dozens of young and early career researchers from around the world, and she was a friend and confidant to many of her students and colleagues and their families. Prof. Olmstead's incisive mind, infectious enthusiasm, and tireless dedication will be greatly missed. 


DAY SEVEN: Thursday, August 5, 2021

CANCELLED: 4.2.1 Crystallization on the International Space Station
Thursday, 8/5/2021 @ 12-3 PM EDT
Sponsoring SIG: Service
Co-Sponsoring SIGs: Bio, General Interest, M/N/P, Small Molecule


3.2.3 Evolution and Impact of Targeted Protein Degradation in Industry
Thursday, 8/5/2021 @ 12-3 PM EDT
Chair(s): Matt Clifton & Joe Patel
Sponsoring SIG: Industrial

Targeted protein degradation denotes the ability of a small molecule to catalyze the selective breakdown of a protein of interest via the ubiquitin-proteasome system (UPS). The ability to modulate protein levels offer a novel alternative paradigm to classical inhibitors and has been a major focus for both industrial and academic groups around the world. Structural characterization of these small molecule induced, non-cognate ternary complexes between the E3 ligase and protein of interest has presented unique challenges to advancing structure-based drug design efforts. This session will be dedicated to highlighting the significant structural advances that have been made in interrogating these induced complexes, insights into the structure-activity relationships of the small molecules, and the plasticity of the ligases to selectivity recognize disease relevant targets.


3.2.4 Getting the First Crystal
Thursday, 8/5/2021 @ 12-3 PM EDT
Chair(s): Sarah Bowman & Janet Newman
Sponsoring SIG: Biological Macromolecules
Co-Sponsoring SIGs: Canadian, Young Scientist

Crystallography needs high-quality, well-diffracting crystals – this is a rate limiting step in crystal based structure determination. In this session we will discuss screening strategies, developing new crystallization screens, seeding, modulating a protein construct to make it ‘more crystallizable’, strategies for membrane proteins, strategies for ‘seeing’ crystals, etc. Do you have a good ‘getting the first crystal’ story about a system you are working on? Do you have a strategy that works almost all of the time? We welcome submission of abstracts on these topics.

Sponsored by:


3.2.5 Quantum Materials: Magnetism, Correlation, and Topology in Condensed Matter
Thursday, 8/5/2021 @ 12-3 PM EDT
Chair(s): Jared Allred & Benjamin Frandsen
Sponsoring SIG: M/N/P

In quantum materials, non-trivial quantum mechanical states give rise to unusual macroscopic properties. Quantum materials stretch our understanding of the fundamental physics of materials and, in many cases, hold tremendous promise for eventual technological application. This class of materials includes topological materials, spin liquids, and other magnetic and/or correlated electron systems. The intriguing emergent phenomena observed in such systems can be heavily dependent on the physical structure, where even subtle details can have significant impact. This session will emphasize how crystallographic tools have been or can be used to uncover the structure-property relationship in quantum materials.

 

CANCELLED: 3.2.2 Deciphering Chiral Structures in Soft Materials Via Correlative Approach of X-ray, Neutron Scattering, and Electron Microscopy
Thursday, 8/5/2021 @ 12-3 PM EDT
Sponsoring SIG: SAS

 

4.1.1 BioWAXS: Experiment & Interpretation
Thursday, 8/5/2021 @ 12-3 PM EDT
Chair(s): Steve Meisburger & Jochen Hub
Sponsoring SIG: SAS

The molecules of life are in constant motion. To gain insight into dynamics on the atomic scale, it is increasingly common to apply wide-angle X-ray scattering (WAXS) to biomolecular solutions or condensed phases, especially in conjunction with time-resolved experiments. The WAXS signal is uniquely sensitive to dynamic structural fluctuations and hydration effects, both of which are key to a mechanistic understanding of function. However, the challenge of interpreting the WAXS signal has traditionally limited its biological applications. In recent years, the challenge has been addressed through a combination of new experimental techniques (such as temperature-jump and X-FEL) and sophisticated computational approaches (such as ensemble fitting, physics-based modeling, and machine learning). In this session, we aim to advance the field by highlighting recent experimental results and new methods for interpretation.

Sponsored By:

                   

 

 

Invited Speakers:
Philip Anfinrud, National Institutes of Health, USA
Giorgio Schiro, Institut de Biologie Structurale - Grenoble, France
Hyotcherl Ihee, Korea Advanced Institute of Science and Technology, Republic of Korea