RT Journal Article SR Electronic(1) A1 Suyama, Tetsushi A1 Shigematsu, Toru A1 Takaichi, Shinichi A1 Nodasaka, Yoshinobu A1 Fujikawa, Seizo A1 Hosoya, Hiroyuki A1 Tokiwa, Yutaka A1 Kanagawa, Takahiro A1 Hanada, SatoshiYR 1999 T1 Roseateles depolymerans gen. nov., sp. nov., a new bacteriochlorophyll a-containing obligate aerobe belonging to the β-subclass of the Proteobacteria JF International Journal of Systematic and Evolutionary Microbiology, VO 49 IS 2 SP 449 OP 457 DO https://doi.org/10.1099/00207713-49-2-449 PB Microbiology Society, SN 1466-5034, AB Strains 61AT(T = type strain) and 61B2, the first bacteriochlorophyll (BChl) a-containing obligate aerobes to be classified in the β-subclass of the Proteobacteria, were isolated from river water. The strains were originally isolated as degraders of poly(hexamethylene carbonate) (PHC). The organisms can utilize PHC and some other biodegradable plastics. The strains grow only under aerobic conditions. Good production of BChl a and carotenoid pigments is achieved on PHC agar plates and an equivalent production is observed under oligotrophic conditions on agar medium. Spectrometric results suggest that BChl a is present in light-harvesting complex I and the photochemical reaction centre. The main carotenoids are spirilloxanthin and its precursors. Analysis of the 16S rRNA gene sequence indicated that the phylogenetic positions of the two strains are similar to each other and that their closest relatives are the genera Rubrivivax, Ideonella and Leptothrix with similarities of 96·3, 96·2 and 96·1%, respectively. The cells are motile, straight rods and contain poly-β- hydroxybutyrate granules. Ubiquinone-8 is the predominant quinone. Vitamins are not required for growth. The G+C content of genomic DNA is 66·2–66·3 mol%. Genetic and phenotypic features suggest that the strains represent a new genus in the β-subclass which is evenly distant from known genera. Consequently, the name Roseateles depolymerans gen. nov., sp. nov. is proposed for the strains; the type strain of Roseateles depolymerans is strain 61AT(= DSM 11813T)., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/00207713-49-2-449