Molecular structure of peptaibol antibiotics: solution conformation and crystal structure of the octapeptide corresponding to the 2-9 sequence of emerimicins III and IV.

Abstract:

:The infrared absorption and 1H nuclear magnetic resonance analyses of chloroform solutions of the terminally-blocked segment corresponding to the 2-9 sequence of emerimicins III and IV, -(Aib)3-L-Val-Gly-L-Leu-(Aib)2-, are consistent with the presence of a 3(10)-helical structure of high thermal stability. The crystal structure of the octapeptide, obtained by X-ray diffraction indicates the formation of a right-handed 3(10)-helix, stabilized by six consecutive intramolecular N-H....O:C H-bonds, slightly distorted at the level of the L-Leu residue.

journal_name

J Biomol Struct Dyn

authors

Toniolo C,Bonora GM,Bavoso A,Benedetti E,di Blasio B,Pavone V,Pedone C

doi

10.1080/07391102.1985.10508446

subject

Has Abstract

pub_date

1985-12-01 00:00:00

pages

585-98

issue

3

eissn

0739-1102

issn

1538-0254

journal_volume

3

pub_type

杂志文章