title: Structure and stability of chiral beta-tapes: a computational coarse-grained approach.
abstract: We present two coarse-grained models of different levels of detail for the description of beta-sheet tapes obtained from equilibrium self-assembly of short rationally designed oligopeptides in solution. Here we only consider the case of the homopolymer oligopeptides with the identical sidegroups attached, in which the tapes have a helicoid surface with two equivalent sides. The influence of the chirality parameter on the geometrical characteristics, namely the diameter, interstrand distance, and pitch, of the tapes has been investigated. The two models are found to produce equivalent results suggesting a considerable degree of universality in conformations of the tapes.
authors.affiliation: Theory and Computation Group, Centre for Synthesis and Chemical Biology, Conway Institute for Biomolecular and Biomedical Research, Department of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland. Giovanni.Bellesia@ucd.ie
authors.forename: Giovanni
authors.initials: G
authors.lastname: Bellesia
authors.forename: Maxim V
authors.initials: MV
authors.lastname: Fedorov
authors.forename: Yuri A
authors.initials: YA
authors.lastname: Kuznetsov
authors.forename: Edward G
authors.initials: EG
authors.lastname: Timoshenko
mesh_terms: D003198:Computer Simulation; D008958:Models, Molecular; D009842:Oligopeptides / Q000737:chemistry*; D017433:Protein Structure, Secondary; D013237:Stereoisomerism
chemical_list: D009842:Oligopeptides