Molecular dynamics with helical periodic boundary conditions

Copyright © 2014 Wiley Periodicals, Inc.

Bibliographische Detailangaben
Veröffentlicht in:Journal of computational chemistry. - 1984. - 35(2014), 21 vom: 05. Aug., Seite 1552-9
1. Verfasser: Kessler, Jiří (VerfasserIn)
Weitere Verfasser: Bouř, Petr
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:Journal of computational chemistry
Schlagworte:Journal Article amyloid fibrils helical symmetry molecular dynamics periodic boundary conditions protein structure
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520 |a Helical symmetry is often encountered in nature and thus also in molecular dynamics (MD) simulations. In many cases, an approximation based on infinite helical periodicity can save a significant amount of computer time. However, standard simulations with the usual periodic boundary conditions (PBC) are not easily compatible with it. In the present study, we propose and investigate an algorithm comprising infinitely propagated helicity, which is compatible with commonly used MD software. The helical twist is introduced as a parametric geometry constraint, and the translational PBC are modified to allow for the helical symmetry via a transitional solvent volume. The algorithm including a parallel code was implemented within the Tinker software. The viability of the helical periodic boundary conditions (HPBC) was verified in test simulations including α-helical and polyproline II like peptide structures. For an insulin-based model, the HPBC dynamics made it possible to simulate a fibrillar structure, otherwise not stable within PBC 
650 4 |a Journal Article 
650 4 |a amyloid fibrils 
650 4 |a helical symmetry 
650 4 |a molecular dynamics 
650 4 |a periodic boundary conditions 
650 4 |a protein structure 
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