title: Structure of euhalothece-362, a novel red-shifted mycosporine-like amino acid, from a halophilic cyanobacterium (Euhalothece sp.).
abstract: The unicellular cyanobacterium Euhalothece sp. strain LK-1, isolated from a gypsum crust on the bottom of a hypersaline saltern pond in Eilat, Israel, contains high concentrations of two mycosporine-like amino acids with maximum absorbance at 331 and 362 nm when grown at high light intensities. The 331 nm-absorbing compound has previously been identified as mycosporine-2-glycine. Here, we confirm this identification and document the elucidation of the structure of the 362 nm absorbing compound ('euhalothece-362'), using liquid chromatography/mass spectrometry combined with other techniques, as a novel compound, 2-(E)-3-(E)-2,3-dihydroxyprop-1-enylimino-mycosporine-alanine.
authors.affiliation: Geomicrobiology, Institute of Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky University Oldenburg, Oldenburg, Germany.
authors.forename: Marc
authors.initials: M
authors.lastname: Volkmann
authors.forename: Anna A
authors.initials: AA
authors.lastname: Gorbushina
authors.forename: Laura
authors.initials: L
authors.lastname: Kedar
authors.forename: Aharon
authors.initials: A
authors.lastname: Oren
mesh_terms: D000409:Alanine / Q000031:analogs & derivatives* / Q000737:chemistry; D000596:Amino Acids / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D000458:Cyanobacteria / Q000737:chemistry*; D003511:Cyclohexanols / Q000737:chemistry*; D005998:Glycine / Q000031:analogs & derivatives / Q000737:chemistry; D013058:Mass Spectrometry
chemical_list: D000596:Amino Acids; D003511:Cyclohexanols; C511500:euhalothece-362; C463482:mycosporine-2-glycine; D000409:Alanine; D005998:Glycine