C11/C9 Helices in Crystals of αβ Hybrid Peptides and Switching Structures between Helix Types by Variation in the α-Residue

Basuroy, Krishnayan ; Karuppiah, Vasantham ; Balaram, Padmanabhan (2014) C11/C9 Helices in Crystals of αβ Hybrid Peptides and Switching Structures between Helix Types by Variation in the α-Residue Organic Letters, 16 (17). pp. 4614-4617. ISSN 1523-7060

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Official URL: http://doi.org/10.1021/Ol5021866

Related URL: http://dx.doi.org/10.1021/Ol5021866

Abstract

Close-packed helices with mixed hydrogen bond directionality are unprecedented in the structural chemistry of α-polypeptides. While NMR studies in solution state provide strong evidence for the occurrence of mixed helices in (ββ)n and (αβ)n sequences, limited information is currently available in crystals. The peptide structures presented show the occurrence of C11/C9 helices in (αβ)n peptides. Transitions between C11 and C11/C9 helices are observed upon varying the α-amino acid residue.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:131246
Deposited On:06 Dec 2022 05:43
Last Modified:06 Dec 2022 05:43

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