Side-chain conformations cooperatively restricted in protein secondary structure .2. Side-chain configurational entropies of alpha-helices in the folding nuclei

被引:5
|
作者
Nakamura, H
Tanimura, R
Kidera, A
机构
[1] TORAY INDUSTRIES LTD, BASIC RES LABS, KAMAKURA, KANAGAWA 248, JAPAN
[2] KYOTO UNIV, GRAD SCH SCI, SAKYO KU, KYOTO 60601, JAPAN
来源
PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES | 1996年 / 72卷 / 07期
关键词
protein structure; side-chain conformation; secondary structure; configurational entropy; folding nucleus; Levinthal paradox;
D O I
10.2183/pjab.72.149
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Protein side-chain configurational entropies and their correlations were analyzed for alpha-helices in several proteins. The conformations of several bulky side-chains in helices were found to be cooperatively fixed by the restricted side-chain conformations of the neighboring beta-branched amino acids. Such helices correspond well to the experimentally observed nuclei in the folding procedures, so that the folding rates should be significantly accerelated. This phenomenon may be a reasonable answer to the Levinthal paradox.
引用
收藏
页码:149 / 152
页数:4
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