title: Bacterioruberin and salinixanthin carotenoids of extremely halophilic Archaea and Bacteria: a Raman spectroscopic study.
abstract: Laboratory cultures of a number of red extremely halophilic Archaea (Halobacterium salinarum strains NRC-1 and R1, Halorubrum sodomense, Haloarcula valismortis) and of Salinibacter ruber, a red extremely halophilic member of the Bacteria, have been investigated by Raman spectroscopy using 514.5nm excitation to characterize their carotenoids. The 50-carbon carotenoid α-bacterioruberin was detected as the major carotenoid in all archaeal strains. Raman spectroscopy also detected bacterioruberin as the main pigment in a red pellet of cells collected from a saltern crystallizer pond. Salinibacter contains the C40-carotenoid acyl glycoside salinixanthin (all-E, 2'S)-2'-hydroxy-1'-[6-O-(methyltetradecanoyl)-β-d-glycopyranosyloxy]-3',4'-didehydro-1',2'-dihydro-β,ψ-carotene-4-one), for which the Raman bands assignments of are given here for the first time.
authors: Charles University, Institute of Geochemistry, Mineralogy and Mineral Resources, Prague, Czech Republic. jehlicka@natur.cuni.cz
authors: J
authors: J
authors: Jehlička
authors: H G M
authors: HG
authors: Edwards
authors: A
authors: A
authors: Oren
mesh_terms: D041963:Bacteroidetes / Q000737:chemistry*; D002338:Carotenoids / Q000737:chemistry* / Q000302:isolation & purification; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D019613:Haloarcula / Q000737:chemistry; D006216:Halobacteriaceae / Q000737:chemistry*; D019617:Halobacterium salinarum / Q000737:chemistry; D055352:Halorubrum / Q000737:chemistry; D013059:Spectrum Analysis, Raman
chemical_list: D006027:Glycosides; C470489:salinixanthin; C002951:bacterioruberin; D002338:Carotenoids