An NMR study of eremomycin and its derivatives. Full 1H and 13C assignment, motional behavior, dimerization and complexation with Ac-D-Ala-D-Ala

J Antibiot (Tokyo). 1991 Nov;44(11):1208-21. doi: 10.7164/antibiotics.44.1208.

Abstract

Complete 1H and 13C NMR assignments are presented for eremomycin (1) and some of its desglycosylated derivatives 2, 3 and compared to the structurally closely related glycopeptide vancomycin. Primary structure and stereochemistry of eremomycin is corroborated by the present high field total correlation spectroscopy, NOESY and heteronuclear multiple-bond correlation NMR methods. A rough motional characterization of the title compound is attempted by 13C-T1 and 13C-[1H] NOE measurements. Dimerization of eremomycin is observed both in DMSO-d6-CCl4 and D2O solutions. Complexation with cell wall analogue dipeptide Ac-D-Ala-D-Ala is also demonstrated.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anti-Bacterial Agents* / chemistry*
  • Glycopeptides / chemistry
  • Magnetic Resonance Spectroscopy
  • Stereoisomerism
  • Structure-Activity Relationship
  • Vancomycin / chemistry

Substances

  • Anti-Bacterial Agents
  • Glycopeptides
  • eremomycin
  • Vancomycin