Is the parallel or antiparallel β-sheet more stable? A semiempirical study

被引：0
|
作者：
Christian Gailer
Martin Feigel
机构：
[1] University of Bochum,Department of Chemistry
来源：
Journal of Computer-Aided Molecular Design | 1997年 / 11卷
关键词：
Beta-sheet; AM1; Semiempirical calculation; Hydrogen bonding; Peptides;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The geometry and energy of parallel and antiparallel peptidic β-sheets have been calculated using AM1. β-Sheets composed of two peptide chains of up to 11 amino acid residues (Ala and Gly) and the dimers of cyclooctapeptides are used as model systems. The enthalpic difference between the parallel and the antiparallel arrangement is calculated to be very small, as it is found experimentally for the cyclic systems. The coordinates of the calculated structure of the cyclooctapeptide dimer 1 (cyclo-D,L-(Ala)8) have an rms deviation of only 0.223 Å to the coordinates of the corresponding cyclopeptide obtained by X-ray analysis.
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页码：273 / 277
页数：4
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