title: A42867, a novel glycopeptide antibiotic.
abstract: A42867 is a new glycopeptide antibiotic of the ristocetin-vancomycin class active against aerobic and anaerobic Gram-positive bacteria. A42867 is produced by a strain of Nocardia nov. sp. ATCC 53492. A42867 was isolated during a screening program aimed at the discovery of new members of this glycopeptide class of antibiotics, by affinity chromatography based on an acyl-D-alanyl-D-alanine probe. The structure of A42867 was elucidated by fast atom bombardment MS, high field 2D 1H NMR spectroscopy, and HPLC analysis of the hydrolyzed carbohydrates. A42867 differs from vancomycin in the sugar portion and in the presence of only one chlorine atom in the peptide core. Its biological activity on Gram-positive aerobic and anaerobic bacteria is similar to that of other antibiotics of this group.
authors.affiliation: Merrell Dow Research Institute, Lepetit Reseach Center, Gerenzano, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Riva
authors.forename: L
authors.initials: L
authors.lastname: Gastaldo
authors.forename: M G
authors.initials: MG
authors.lastname: Beretta
authors.forename: P
authors.initials: P
authors.lastname: Ferrari
authors.forename: L F
authors.initials: LF
authors.lastname: Zerilli
authors.forename: G
authors.initials: G
authors.lastname: Cassani
authors.forename: E
authors.initials: E
authors.lastname: Selva
authors.forename: B P
authors.initials: BP
authors.lastname: Goldstein
authors.forename: M
authors.initials: M
authors.lastname: Berti
authors.forename: F
authors.initials: F
authors.lastname: Parenti
mesh_terms: D000617:Aminoglycosides; D000900:Anti-Bacterial Agents / Q000032:analysis* / Q000096:biosynthesis / Q000302:isolation & purification / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D002846:Chromatography, Affinity; D002851:Chromatography, High Pressure Liquid; D003470:Culture Media; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D009615:Nocardia / Q000145:classification / Q000254:growth & development / Q000302:isolation & purification / Q000378:metabolism*; D013055:Spectrophotometry, Infrared; D013696:Temperature
chemical_list: D000617:Aminoglycosides; D000900:Anti-Bacterial Agents; D003470:Culture Media; C059934:A 42867