title: Mycoplanecins, novel antimycobacterial antibiotics from Actinoplanes awajinensis subsp. mycoplanecinus subsp. nov. III. Structural determination of mycoplanecin A.
abstract: The structure of mycoplanecin A was determined by the analysis of chemical degradation products and by mass and 1H and 13C NMR spectrometries. Mycoplanecin A is a new cyclic peptide antibiotic composed of mol each of alpha-ketobutyric acid, glycine, L-leucine, L-proline, L-2-amino-5-methylhexanoic acid, N-methyl-D-leucine, N-methyl-L-threonine, methyl-L-proline and ethyl-L-proline and two mol of N-methyl-L-valine. Among these components, ethyl-L-proline is reported for the first time as a component of natural products. A newly developed mass analysis has been introduced for the differentiation of alpha-amino acid and its N-methyl derivative.
mesh_terms: D000192:Actinomycetales / Q000254:growth & development*; D000595:Amino Acid Sequence; D000900:Anti-Bacterial Agents; D006868:Hydrolysis; D007202:Indicators and Reagents; D036341:Intercellular Signaling Peptides and Proteins; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010455:Peptides / Q000302:isolation & purification; D011487:Protein Conformation
chemical_list: D000900:Anti-Bacterial Agents; D007202:Indicators and Reagents; D036341:Intercellular Signaling Peptides and Proteins; D010455:Peptides; C039533:mycoplanecin A