title: Alteromonas infernus sp. nov., a new polysaccharide-producing bacterium isolated from a deep-sea hydrothermal vent.
abstract: A deep-sea, aerobic, mesophilic and heterotrophic new bacterium was isolated from a sample of fluid collected among a dense population of Riftia pachyptila, in the vicinity of an active hydrothermal vent of the Southern depression of the Guaymas basin (Gulf of California). On the basis of phenotypic and phylogenetic analyses and DNA/DNA relatedness, the strain GY785 was recognized as a new species of the genus Alteromonas and the name of Alteromonas infernus is proposed. During the stationary phase in batch cultures in the presence of glucose, this bacterium secreted two unusual polysaccharides. The water-soluble exopolysaccharide-1 produced contained glucose, galactose, galacturonic and glucuronic acids as monosaccharides. The gel-forming exopolysaccharide-2 was separated from the bacterial cells by dialysis against distilled water and partially characterized.
authors.affiliation: IFREMER, Centre de Brest, DRV/VP, Plouzané, France.
authors.forename: G H
authors.initials: GH
authors.lastname: Raguénès
authors.forename: A
authors.initials: A
authors.lastname: Peres
authors.forename: R
authors.initials: R
authors.lastname: Ruimy
authors.forename: P
authors.initials: P
authors.lastname: Pignet
authors.forename: R
authors.initials: R
authors.lastname: Christen
authors.forename: M
authors.initials: M
authors.lastname: Loaec
authors.forename: H
authors.initials: H
authors.lastname: Rougeaux
authors.forename: G
authors.initials: G
authors.lastname: Barbier
authors.forename: J G
authors.initials: JG
authors.lastname: Guezennec
mesh_terms: D001482:Base Composition; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D005947:Glucose / Q000378:metabolism; D006088:Gram-Negative Aerobic Bacteria / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism; D008969:Molecular Sequence Data; D010802:Phylogeny; D011135:Polysaccharides, Bacterial / Q000096:biosynthesis* / Q000737:chemistry; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid; D014871:Water Microbiology
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D011135:Polysaccharides, Bacterial; D012336:RNA, Ribosomal, 16S; D005947:Glucose