title: Kettapeptin: isolation, structure elucidation and activity of a new hexadepsipeptide antibiotic from a terrestrial Streptomyces sp.
abstract: The ethyl acetate extract of the Streptomyces sp. isolate GW99/1572 exhibited significant biological activity against Gram-positive bacteria and delivered kettapeptin (1), a new hexadepsipeptide antibiotic of the azinothricin type. The structure was elucidated by various 1D and 2D NMR techniques, mass spectrometry and by comparison of the NMR data with those of closely related antibiotics. The absolute configuration of the compound was derived by crystal structure analysis and by comparison with the optical rotation data of related compounds.
authors.affiliation: : Department of Organic and Biomolecular Chemistry, University of Göttingen, Tammanstrasse 2, D-37077 Göttingen, Germany.
authors.forename: Rajendra P
authors.initials: RP
authors.lastname: Maskey
authors.forename: Serge
authors.initials: S
authors.lastname: Fotso
authors.forename: Madhumati
authors.initials: M
authors.lastname: Sevvana
authors.forename: Isabel
authors.initials: I
authors.lastname: Usón
authors.forename: Iris
authors.initials: I
authors.lastname: Grün-Wollny
authors.forename: Hartmut
authors.initials: H
authors.lastname: Laatsch
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D000903:Antibiotics, Antineoplastic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D045744:Cell Line, Tumor; D018360:Crystallography, X-Ray; D047630:Depsipeptides / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D006801:Humans; D008826:Microbial Sensitivity Tests; D008958:Models, Molecular; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009904:Optical Rotation; D010456:Peptides, Cyclic / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013302:Streptomyces / Q000737:chemistry*
chemical_list: D000890:Anti-Infective Agents; D000903:Antibiotics, Antineoplastic; D047630:Depsipeptides; D010456:Peptides, Cyclic; C512876:kettapeptin