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Intramolecular steric effects and hydrogen bonding in regular conformations of polyamino acids

✍ Scribed by S. J. Leach; George Némethy; Harold A. Scheraga

Publisher
Wiley (John Wiley & Sons)
Year
1966
Tongue
English
Weight
921 KB
Volume
4
Category
Article
ISSN
0006-3525

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✦ Synopsis

Synopsis

A survey has been made, by using computer methods, of the types of helices which polypeptide chains can form, taking into account steric requirements and intramolecular hydrogen-bonding interactions. The influence on these two requirements, of small variations in the bond angles of the peptide residues, or of small changes in the overall dimensions of the helix (pitch and residues per turn), have been assessed for the special case of the a-helix. Criteria for the formation of acceptable hydrogen bonds have also been applied to helices of other types, viz., the Stus y-, W-, and r-helices. It was shown that the N-He a 0 and H . . -0-C angles in hydrogen bonds are sensitive to changes in

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