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Conformational energy map for a pair of peptide units using the bond polarisability method

✍ Scribed by K. A. R. Sundaram Srinivasan


Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
542 KB
Volume
12
Category
Article
ISSN
0020-7608

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✦ Synopsis


Abstract

A method recently developed for the calculation of intramolecular nonbonded interactions based on experimental bond polarisabilities and atomic charges and transition π‐charges obtained from MO calculations has been applied to the alanyl dipeptide. The potential energy contours in the Ο•, ψ plane obtained by this method compare favourably with those derived from the frequency of occurrence of conformations in globular proteins. An analysis of the various components of the nonbonded interaction energy indicates that the fairly frequent occurrence of conformations around Ο• = βˆ’80Β°, ψ=0Β° is presumably due to a favourable interaction of the π‐polarisation.


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