title: Caldimonas manganoxidans gen. nov., sp. nov., a poly(3-hydroxybutyrate)-degrading, manganese-oxidizing thermophile.
abstract: A poly(3-hydroxybutyrate) (PHB)-degrading, gram-negative, aerobic bacterium, strain HS(T), was isolated from a hot spring and chemotaxonomically and phylogenetically characterized. The oxidase-positive, weakly catalase-positive, non-pigmented cells (0.6 x 2.6 microm) exhibited a single polar flagellum and accumulated PHB granules. Strain HS(T) was capable of manganese oxidation. Highest growth rate was attained at 50 degrees C. The optimum pH for growth was 7-8. The major respiratory quinone was ubiquinone-8 and major cellular fatty acids were C16:0, C16:1 and C18:1. The G+C content of the DNA was 66.2 mol%. Comparative 16S rDNA analysis indicated that strain HS(T) is related to the Rubrivivax subgroup and the family Comamonadaceae. The nearest phylogenetic relatives were Ideonella dechloratans (92.1% similarity), Leptothrix discophora (93.6%), Roseateles depolymerans (92.4%) and Rubrivivax gelatinosus (92.2%). On the basis of its phylogenetic and phenotypic properties, it is proposed that this isolate be designated Caldimonas manganoxidans gen. nov., sp. nov.; the type strain is HS(T) (= JCM 10698T = IFO 16448T = ATCC BAA-369T).
authors.forename: Minoru
authors.initials: M
authors.lastname: Takeda
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Kamagata
authors.forename: William C
authors.initials: WC
authors.lastname: Ghiorse
authors.forename: Satoshi
authors.initials: S
authors.lastname: Hanada
authors.forename: Jun-Ichi
authors.initials: JI
authors.lastname: Koizumi
mesh_terms: D015373:Bacterial Typing Techniques; D020562:Betaproteobacteria / Q000737:chemistry / Q000145:classification* / Q000235:genetics / Q000254:growth & development; D004275:DNA, Ribosomal / Q000032:analysis; D005618:Fresh Water / Q000382:microbiology*; D006358:Hot Temperature; D006885:Hydroxybutyrates / Q000378:metabolism*; D008345:Manganese / Q000378:metabolism*; D008969:Molecular Sequence Data; D010084:Oxidation-Reduction; D010641:Phenotype; D010802:Phylogeny; D011091:Polyesters / Q000378:metabolism*; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D000094122:Polyhydroxybutyrates
chemical_list: D004275:DNA, Ribosomal; D006885:Hydroxybutyrates; D008345:Manganese; D011091:Polyesters; D012336:RNA, Ribosomal, 16S; C003182:poly-beta-hydroxybutyrate; D000094122:Polyhydroxybutyrates