21-residue peptide's dynamics at and between elementary structural transitions


Elementary conformational changes of the backbone of a 21-residue peptide A5(A3RA)3A are studied using molecular dynamics simulations in explicit water. The processes of the conformational transitions and the regimes of stationary fluctuations between them are investigated using minimal perturbations of the system. The perturbations consist of a few degrees rotation of the velocity of one of the systems' atoms and keep the system on the same energy surface. It is found that (i) the system dynamics is insignificantly changed by the perturbations in the regimes between the transitions; (ii) it is very sensitive to the perturbations just before the transitions that prevents the peptide from making the transitions; and (iii) the perturbation of any atom of the system, including distant water molecules is equally effective in preventing the transition. The latter implies strongly collective dynamics of the peptide and water during the transitions.

Publication DOI: https://doi.org/10.1016/j.molliq.2008.10.015
Divisions: College of Engineering & Physical Sciences > Systems analytics research institute (SARI)
Additional Information: NOTICE: this is the author’s version of a work that was accepted for publication in e's dynamics at and between elementary structural transitions', Journal of molecular liquids. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Nerukh, D & Taiji, M, '21-residue peptide's dynamics at and between elementary structural transitions', Journal of molecular liquids, vol 147, no. 1-2, (2009). DOI http://dx.doi.org/10.1016/j.molliq.2008.10.015
Uncontrolled Keywords: conformational changes,elementary transitions,collective dynamics,trajectory perturbations,phase space flow
Publication ISSN: 1873-3166
Last Modified: 15 Apr 2024 07:10
Date Deposited: 11 Mar 2019 18:06
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2009-07-20
Published Online Date: 2008-11-19
Authors: Nerukh, Dmitry (ORCID Profile 0000-0001-9005-9919)
Taiji, Makoto



Version: Accepted Version

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