title: Homotyrosine-containing cyanopeptolins 880 and 960 and anabaenopeptins 908 and 915 from Planktothrix agardhii CYA 126/8.
abstract: Two homotyrosine-bearing cyanopeptolins are described from Planktothrix agardhii CYA 126/8. The compounds feature a common homotyrosine-containing cyclohexadepsipeptide and differ by sulfation of an exocyclically located 2-O-methyl-d-glyceric acid residue. In addition we describe two anabaenopeptins, which contain two homotyrosine residues, one of which is N-methylated. The anabaenopeptins have a common cyclopentapeptide portion and differ in the amino acid linked to it via an ureido bond, arginine and tyrosine, respectively.
authors.affiliation: Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, Hawaii 96822, USA.
authors.forename: Hilary S
authors.initials: HS
authors.lastname: Okumura
authors.forename: Benjamin
authors.initials: B
authors.lastname: Philmus
authors.forename: Cyril
authors.initials: C
authors.lastname: Portmann
authors.forename: Thomas K
authors.initials: TK
authors.lastname: Hemscheidt
mesh_terms: D000458:Cyanobacteria / Q000737:chemistry*; D047630:Depsipeptides; D006254:Hawaii; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010456:Peptides, Cyclic / Q000737:chemistry* / Q000302:isolation & purification*; D014443:Tyrosine / Q000031:analogs & derivatives / Q000737:chemistry
chemical_list: D047630:Depsipeptides; D010456:Peptides, Cyclic; C535143:anabaenopeptin 908; C535141:anabaenopeptin 915; C535140:cyanopeptolin 880; C535142:cyanopeptolin 960; D014443:Tyrosine