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Kurkal-Siebert V, Smith JC. Low-Temperature Protein Dynamics: A Simulation Analysis of Interprotein Vibrations and the Boson Peak at 150 K. J Am Chem Soc 2006; 128:2356-64. [PMID: 16478191 DOI: 10.1021/ja055962q] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An understanding of low-frequency, collective protein dynamics at low temperatures can furnish valuable information on functional protein energy landscapes, on the origins of the protein glass transition and on protein-protein interactions. Here, molecular dynamics (MD) simulations and normal-mode analyses are performed on various models of crystalline myoglobin in order to characterize intra- and interprotein vibrations at 150 K. Principal component analysis of the MD trajectories indicates that the Boson peak, a broad peak in the dynamic structure factor centered at about approximately 2-2.5 meV, originates from approximately 10(2) collective, harmonic vibrations. An accurate description of the environment is found to be essential in reproducing the experimental Boson peak form and position. At lower energies other strong peaks are found in the calculated dynamic structure factor. Characterization of these peaks shows that they arise from harmonic vibrations of proteins relative to each other. These vibrations are likely to furnish valuable information on the physical nature of protein-protein interactions.
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Affiliation(s)
- Vandana Kurkal-Siebert
- Interdisciplinary Center for Scientific Computing (IWR), University of Heidelberg, Im Neuenheimer Feld 368, D-69120 Heidelberg, Germany.
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Kaledin AL, Kaledin M, Bowman JM. All-Atom Calculation of the Normal Modes of Bacteriorhodopsin Using a Sliding Block Iterative Diagonalization Method. J Chem Theory Comput 2005; 2:166-74. [DOI: 10.1021/ct050161z] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Alexey L. Kaledin
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computing, Emory University, Atlanta, Georgia 30322
| | - Martina Kaledin
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computing, Emory University, Atlanta, Georgia 30322
| | - Joel M. Bowman
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computing, Emory University, Atlanta, Georgia 30322
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Abstract
Intermediate neglect of differential overlap (INDO) is the most commonly utilized semiempirical technique for performing excited state calculations on large organic systems such as organic semiconductors and fluorescent dyes. The calculations are typically done at the singles-configuration interaction (SCI) level. Direct methods provide a more efficient means of performing configuration interaction (CI) calculations, and the computational trade offs associated with various approaches to direct-CI theory have been well characterized for ab initio Hamiltonians and high-order CI. However, the INDO and SCI approximations lead to a new set of trade offs. In particular, application of the electron-electron interactions in the atomic basis leads to savings in computational time that scale as the number of atomic orbitals, which for a large organic system can be two to three orders of magnitude. These savings are largest when only a few low-lying excited states are generated and when a full SCI basis, which includes excitations between all filled and empty molecular orbitals, is used. In addition, substantial memory savings are achieved in the direct method by avoiding the evaluation of the two electron integrals in the molecular orbital basis. The method is demonstrated by calculating the absorption spectrum of a poly(paraphenylenevinylene) oligomer containing 16 phenyl rings.
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Affiliation(s)
- Aimée Tomlinson
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA
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Hathorn BC, Sumpter BG, Noid DW, Tuzun RE, Yang C. Computational simulation of polymer particle structures: vibrational normal modes using the time averaged normal coordinate analysis method. POLYMER 2003. [DOI: 10.1016/s0032-3861(02)00436-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Hathorn BC, Sumpter BG, Noid DW, Tuzun RE, Yang C. Vibrational Normal Modes of Polymer Nanoparticle Dimers Using the Time-Averaged Normal Coordinate Analysis Method. J Phys Chem A 2002. [DOI: 10.1021/jp013584f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Bryan C. Hathorn
- Division of Computer Science and Mathematics, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - Bobby G. Sumpter
- Division of Computer Science and Mathematics, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - Donald W. Noid
- Division of Computer Science and Mathematics, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - Robert E. Tuzun
- Department of Computational Science, SUNY College at Brockport, Brockport, New York 14420
| | - Chao Yang
- National Energy Research Science Computing Center, Lawrence Berkeley National Laboratory, Berkeley, California 94720
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Hathorn BC, Sumpter BG, Noid DW, Barnes MD. Molecular Dynamics Simulation of Polymer Nanoparticle Collisions: Internal Reorganization and Translation−Vibration Coupling. Macromolecules 2002. [DOI: 10.1021/ma011172z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- B. C. Hathorn
- Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, and Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - B. G. Sumpter
- Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, and Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - D. W. Noid
- Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, and Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - M. D. Barnes
- Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, and Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
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Hathorn BC, Sumpter BG, Barnes MD, Noid DW. Molecular Dynamics Simulation of Collinear Polymer Nanoparticle Collisions: Reaction and Scattering. J Phys Chem B 2001. [DOI: 10.1021/jp012646z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- B. C. Hathorn
- Computer Science and Mathematics Division, and Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - B. G. Sumpter
- Computer Science and Mathematics Division, and Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - M. D. Barnes
- Computer Science and Mathematics Division, and Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
| | - D. W. Noid
- Computer Science and Mathematics Division, and Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
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Mielke SL, Truhlar DG. Displaced-points path integral method for including quantum effects in the Monte Carlo evaluation of free energies. J Chem Phys 2001. [DOI: 10.1063/1.1378043] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Fukui K, Sumpter BG, Barnes MD, Noid DW. Atomistic Dynamics of Nanoscale Polymer Particles. Macromolecules 2000. [DOI: 10.1021/ma000045k] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Kazuhiko Fukui
- Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6197
| | - Bobby G. Sumpter
- Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6197
| | - Michael D. Barnes
- Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6197
| | - Donald W. Noid
- Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6197
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