title: The major carotenoid pigment of a psychrotrophic Micrococcus roseus strain: purification, structure, and interaction with synthetic membranes.
abstract: The major carotenoid pigment of a psychrotrophic Micrococcus roseus strain was purified to homogeneity from methanol extracts of dried cells by reverse-phase liquid chromatography and was designated P-3. On the basis of the UV-visible, infrared, mass, and 1H nuclear magnetic resonance spectra of P-3, it was identified as bisdehydro-beta-carotene-2-carboxylic acid. The pigment interacted with synthetic membranes of phosphatidylcholine and dimyristoyl phosphatidylcholine and stabilized the membranes. These results also indicate that P-3 is different from canthaxanthin, the major carotenoid pigment from a mesophilic M. roseus strain.
authors.affiliation: Centre for Cellular & Molecular Biology, Hyderabad, India.
authors.forename: M V
authors.initials: MV
authors.lastname: Jagannadham
authors.forename: V J
authors.initials: VJ
authors.lastname: Rao
authors.forename: S
authors.initials: S
authors.lastname: Shivaji
mesh_terms: D002338:Carotenoids / Q000737:chemistry / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008567:Membranes, Artificial; D008837:Micrococcus / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D008567:Membranes, Artificial; D002338:Carotenoids