title: Description of Catellibacterium caeni sp. nov., reclassification of Rhodobacter changlensis Anil Kumar et al. 2007 as Catellibacterium changlense comb. nov. and emended description of the genus Catellibacterium.
abstract: A novel non-sporulating, non-motile, catalase- and oxidase-positive, strictly aerobic, Gram-negative, rod-shaped bacterial strain, designated DCA-1(T), was isolated from activated sludge collected from a butachlor wastewater treatment facility. The strain was able to degrade about 85 % of 100 mg butachlor l(-1) within 5 days of incubation. Growth occurred in the presence of 0-6 % (w/v) NaCl [optimum, 1 % (w/v) NaCl] and at pH 5.5-9.0 (optimum, pH 7.0) and 15-35 °C (optimum, 25-30 °C). Vesicular internal membrane structures and photoheterotrophic growth were not observed. The major respiratory quinone was ubiquinone 10 (Q-10) and the major cellular fatty acids were C(18 : 1)ω7c and 11-methyl C(18 : 1)ω7c. The genomic DNA G+C content of strain DCA-1(T) was 62.5 mol%. Phylogenetic analysis based on 16S rRNA gene sequence comparison revealed that strain DCA-1(T) was a member of the family Rhodobacteraceae and was related most closely to the type strain of Catellibacterium aquatile (96.5 % sequence similarity). The combination of phylogenetic analysis, phenotypic characteristics and chemotaxonomic data supports the suggestion that strain DCA-1(T) represents a novel species of the genus Catellibacterium, for which the name Catellibacterium caeni sp. nov. is proposed. The type strain is DCA-1(T) ( = CGMCC 1.7745(T)  = DSM 21823(T)). In addition, based on the characterization data obtained in this study, it is proposed that Rhodobacter changlensis should be reclassified as Catellibacterium changlense comb. nov. (type strain JA139(T)  = DSM 18774(T)  = CCUG 53722(T)  = JCM 14338(T)). An emended description of the genus Catellibacterium is also presented.
authors.affiliation: Key Laboratory for Microbiological Engineering of Agricultural Environment of Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, PR China.
authors.forename: Jin-Wei
authors.initials: JW
authors.lastname: Zheng
authors.affiliation: College of Biology and Environmental Science, Jishou University, Jishou 416000, PR China.|Key Laboratory of Microbial Diversity in Southwest China Ministry of Education, Yunnan Institute of Microbiology, Yunnan University, Kunming 650091, PR China.
authors.forename: Yi-Guang
authors.initials: YG
authors.lastname: Chen
authors.affiliation: Key Laboratory for Microbiological Engineering of Agricultural Environment of Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Key Laboratory for Microbiological Engineering of Agricultural Environment of Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, PR China.
authors.forename: Ying-Ying
authors.initials: YY
authors.lastname: Ni
authors.affiliation: Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China.|Key Laboratory of Microbial Diversity in Southwest China Ministry of Education, Yunnan Institute of Microbiology, Yunnan University, Kunming 650091, PR China.
authors.forename: Wen-Jun
authors.initials: WJ
authors.lastname: Li
authors.affiliation: Key Laboratory for Microbiological Engineering of Agricultural Environment of Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, PR China.
authors.forename: Jian
authors.initials: J
authors.lastname: He
authors.affiliation: Key Laboratory for Microbiological Engineering of Agricultural Environment of Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, PR China.
authors.forename: Shun-Peng
authors.initials: SP
authors.lastname: Li
mesh_terms: D004275:DNA, Ribosomal / Q000235:genetics; D005227:Fatty Acids / Q000378:metabolism; D008969:Molecular Sequence Data; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D016992:Rhodobacter / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism; D041902:Rhodobacteraceae / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism
chemical_list: D004275:DNA, Ribosomal; D005227:Fatty Acids; D012336:RNA, Ribosomal, 16S