The mean geometry of the peptide unit from crystal structure data

Ramachandran, GN and Kolaskar, AS and Ramakrishnan, C and Sasisekharan, V (1974) The mean geometry of the peptide unit from crystal structure data. In: Biochimica et Biophysica Acta (BBA), 359 (2). pp. 298-302.

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Abstract

The average dimensions of the peptide unit have been obtained from the data reported in recent crystal structure analyses of di- and tripeptides. The bond lengths and bond angles agree with those in common use, except for the bond angle C---N---H, which is about 4° less than the accepted value, and the angle C2α---N---H which is about 4° more. The angle τ (Cα) has a mean value of 114° for glycyl residues and 110° for non-glycyl residues. Attention is directed to these mean values as observed in crystal structures, as they are relevant for model building of peptide chain structures.

Item Type:	Journal Article
Publication:	Biochimica et Biophysica Acta (BBA)
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Department/Centre:	Division of Biological Sciences > Molecular Biophysics Unit
Date Deposited:	21 Dec 2009 10:20
Last Modified:	19 Sep 2010 05:45
URI:	http://eprints.iisc.ac.in/id/eprint/23221

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