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Sasaki D, Arai T, Yang Y, Kuramochi M, Furuyama W, Nanbo A, Sekiguchi H, Morone N, Mio K, Sasaki YC. Micro-second time-resolved X-ray single-molecule internal motions of SARS-CoV-2 spike variants. Biochem Biophys Rep 2024; 38:101712. [PMID: 38903159 PMCID: PMC11187434 DOI: 10.1016/j.bbrep.2024.101712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 04/09/2024] [Accepted: 04/13/2024] [Indexed: 06/22/2024] Open
Abstract
Single-molecule intramolecular dynamics were successfully measured for three variants of SARS-CoV-2 spike protein, alpha: B.1.1.7, delta: B.1.617, and omicron: B.1.1.529, with a time resolution of 100 μs using X-rays. The results were then compared with respect to the magnitude and directions of motions for the three variants. The largest 3-D intramolecular movement was observed for the omicron variant irrespective of ACE2 receptor binding. A more detailed analysis of the intramolecular motions revealed that the distribution state of intramolecular motion for the three variants was completely different with and without ACE2 receptor binding. The molecular dynamics for the trimeric spike protein of the omicron variant increased when ACE2 binding occurred. At that time, the diffusion constant increased from 71.0 [mrad2/ms] to 91.1 [mrad2/ms].
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Affiliation(s)
- Daisuke Sasaki
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Kashiwa, Chiba, 277-0882, Japan
| | - Tatsuya Arai
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Kashiwa, Chiba, 277-0882, Japan
| | - Yue Yang
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Kashiwa, Chiba, 277-0882, Japan
| | - Masahiro Kuramochi
- Graduate School of Science and Engineering, Ibaraki University, 4-12-1 Naka-narusawa, Hitachi, Ibaraki, 316-8511, Japan
| | - Wakako Furuyama
- National Research Center for the Control and Prevention of Infectious Diseases, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Nagasaki, 852-8523, Japan
| | - Asuka Nanbo
- National Research Center for the Control and Prevention of Infectious Diseases, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Nagasaki, 852-8523, Japan
| | - Hiroshi Sekiguchi
- Center for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo, Hyogo, 679-5198, Japan
| | - Nobuhiro Morone
- MRC Toxicology Unit, University of Cambridge, Gleeson Building, Tennis Court Road, Cambridge, CB2 1QR, UK
| | - Kazuhiro Mio
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Kashiwa, Chiba, 277-0882, Japan
| | - Yuji C. Sasaki
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Kashiwa, Chiba, 277-0882, Japan
- Center for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo, Hyogo, 679-5198, Japan
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Biswas S, Wong BM. Beyond Conventional Density Functional Theory: Advanced Quantum Dynamical Methods for Understanding Degradation of Per- and Polyfluoroalkyl Substances. ACS ES&T ENGINEERING 2024; 4:96-104. [PMID: 38229882 PMCID: PMC10788865 DOI: 10.1021/acsestengg.3c00216] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 08/18/2023] [Accepted: 08/21/2023] [Indexed: 01/18/2024]
Abstract
Computational chemistry methods, such as density functional theory (DFT), have now become more common in environmental research, particularly for simulating the degradation of per- and polyfluoroalkyl substances (PFAS). However, the vast majority of PFAS computational studies have focused on conventional DFT approaches that only probe static, time-independent properties of PFAS near stationary points on the potential energy surface. To demonstrate the rich mechanistic information that can be obtained from time-dependent quantum dynamics calculations, we highlight recent studies using these advanced techniques for probing PFAS systems. We briefly discuss recent applications ranging from ab initio molecular dynamics to DFT-based metadynamics and real-time time-dependent DFT for probing PFAS degradation in various reactive environments. These quantum dynamical approaches provide critical mechanistic information that cannot be gleaned from conventional DFT calculations. We conclude with a perspective of promising research directions and recommend that these advanced quantum dynamics simulations be more widely used by the environmental research community to directly probe PFAS degradation dynamics and other environmental processes.
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Affiliation(s)
- Sohag Biswas
- Materials Science & Engineering
Program, Department of Chemistry, and Department of Physics &
Astronomy, University of California-Riverside, Riverside, California 92521, United States
| | - Bryan M. Wong
- Materials Science & Engineering
Program, Department of Chemistry, and Department of Physics &
Astronomy, University of California-Riverside, Riverside, California 92521, United States
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Xu Q, Del Ben M, Sait Okyay M, Choi M, Ibrahim KZ, Wong BM. Velocity-Gauge Real-Time Time-Dependent Density Functional Tight-Binding for Large-Scale Condensed Matter Systems. J Chem Theory Comput 2023; 19:7989-7997. [PMID: 37955975 PMCID: PMC10688181 DOI: 10.1021/acs.jctc.3c00689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Indexed: 11/15/2023]
Abstract
We present a new velocity-gauge real-time, time-dependent density functional tight-binding (VG-rtTDDFTB) implementation in the open-source DFTB+ software package (https://dftbplus.org) for probing electronic excitations in large, condensed matter systems. Our VG-rtTDDFTB approach enables real-time electron dynamics simulations of large, periodic, condensed matter systems containing thousands of atoms with a favorable computational scaling as a function of system size. We provide computational details and benchmark calculations to demonstrate its accuracy and computational parallelizability on a variety of large material systems. As a representative example, we calculate laser-induced electron dynamics in a 512-atom amorphous silicon supercell to highlight the large periodic systems that can be examined with our implementation. Taken together, our VG-rtTDDFTB approach enables new electron dynamics simulations of complex systems that require large periodic supercells, such as crystal defects, complex surfaces, nanowires, and amorphous materials.
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Affiliation(s)
- Qiang Xu
- Materials
Science & Engineering Program, Department of
Chemistry, and Department of Physics & Astronomy, University of California−Riverside, Riverside, California 92521, United States
| | - Mauro Del Ben
- Applied
Mathematics & Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Mahmut Sait Okyay
- Materials
Science & Engineering Program, Department of
Chemistry, and Department of Physics & Astronomy, University of California−Riverside, Riverside, California 92521, United States
| | - Min Choi
- Materials
Science & Engineering Program, Department of
Chemistry, and Department of Physics & Astronomy, University of California−Riverside, Riverside, California 92521, United States
| | - Khaled Z. Ibrahim
- Applied
Mathematics & Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Bryan M. Wong
- Materials
Science & Engineering Program, Department of
Chemistry, and Department of Physics & Astronomy, University of California−Riverside, Riverside, California 92521, United States
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