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Crystal Structure and Molecular Conformation of the Cyclic Hexapeptide cyclo-(Gly-Aib-Gly)2 (1996)

Escudero, Encarnacion ; Vidal, Xavier ; Solans, Xavier ; [weitere]

New York, NY [u.a.] : Wiley-Blackwell

Journal of Peptide Science 2 (1996), S. 59-65

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Details

ISSN: 1075-2617

Schlagwort(e): Aminoisobutyric acid ; glycine ; cyclic peptides ; X-ray diffraction ; β-turns ; Chemistry ; Biochemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: We have synthesized and crystallized the cyclic peptide (Gly-Aib-Gly) 2. Its structure has been determined by conventional X-ray diffracti on methods. In the crystal it adopts a conformation with one β-turn (type I) and its mirror image at the other side of the ring. All conformation al angles are similar to those reported for these amino acid residues. In particular the Aib residue has a conformation intermediate between α- and 310-helical conformations. The ring is an adequate model for the β-turn conformation. A molecule of formic acid is found in the crystal which shows a very short hydrogen bond with one of the glycine carbonyl groups.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/psc.48

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