title: Characterization and antioxidative activities of rare C(50) carotenoids-sarcinaxanthin, sarcinaxanthin monoglucoside, and sarcinaxanthin diglucoside-obtained from Micrococcus yunnanensis.
abstract: While screening for antioxidative carotenoids from marine bacteria, we isolated and identified sarcinaxanthin and its glucosylated compounds (sarcinaxanthin monoglucoside and sarcinaxanthin diglucoside) from a moderately halophilic bacterium-Micrococcus yunnanensis strain AOY-1. In the singlet oxygen ((¹O₂) quenching model, the IC(50) values of the antioxidative activities of these carotenoids were as follows: sarcinaxanthin , 57 µM; sarcinaxanthin monoglucoside, 54 µM; and sarcinaxanthin diglucoside, 74 µM. In addition, the complete proton nuclear magnetic resonance (¹H NMR) assignments of sarcinaxanthin monoglucoside pentaacetate and sarcinaxanthin diglucoside octaacetate, and fast atom bombardment mass spectrometry/mass spectrometry (FAB-MS/MS) analyses of sarcinaxanthin and sarcinaxanthin monoglucoside are reported for the first time.
authors.affiliation: Department of Food and Nutrition, Japan Women's University.
authors.forename: Ayako
authors.initials: A
authors.lastname: Osawa
authors.forename: Yoko
authors.initials: Y
authors.lastname: Ishii
authors.forename: Nao
authors.initials: N
authors.lastname: Sasamura
authors.forename: Marie
authors.initials: M
authors.lastname: Morita
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kasai
authors.forename: Takashi
authors.initials: T
authors.lastname: Maoka
authors.forename: Kazutoshi
authors.initials: K
authors.lastname: Shindo
mesh_terms: D000975:Antioxidants / Q000737:chemistry* / Q000494:pharmacology*; D002338:Carotenoids / Q000737:chemistry* / Q000494:pharmacology*; D005960:Glucosides / Q000737:chemistry / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008837:Micrococcus / Q000737:chemistry*; D008968:Molecular Conformation; D011522:Protons; D026082:Singlet Oxygen / Q000737:chemistry; D013237:Stereoisomerism; D024341:Xanthophylls / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000975:Antioxidants; D005960:Glucosides; D011522:Protons; D024341:Xanthophylls; C014802:sarcinaxanthin; D026082:Singlet Oxygen; D002338:Carotenoids