State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, 361005, People's Republic of China.
Curr Microbiol. 2011 Mar;62(3):710-4. doi: 10.1007/s00284-010-9768-1. Epub 2010 Oct 10.
A Gram-negative, non-motile, short rod-shaped or spherical bacterial strain that accumulates poly-β-hydroxybutyrate (PHB) granules was isolated from the Beibu Gulf in the South China Sea. Cells have no polar or subpolar flagella, dividing by binary fission. Phylogenetic analyses based on 16S rRNA gene sequences showed that the strain formed a monophyletic branch at the periphery of the evolutionary radiation occupied by the genus Paracoccus, family Rhodobacteraceae, order Rhodobacterales, class Alphaproteobacteria. The closest neighbours were Paracoccus aestuarii strain B7(T) (97.2% similarity), Paracoccus zeaxanthinifaciens ATCC 21588(T) (97.1% similarity) and Paracoccus homiensis DD-R11(T) (96.8%). The predominant fatty acids were C(18:1) ω7c (82.1%), and significant amounts of C(18:0) (5.6%), C(10:0) 3-OH (2.3%) and C(16:0) (1.5%) were present. The predominant respiratory ubiquinone of strain JLT1284(T) was Q-10 and the DNA G+C content of strain JLT1284(T) was 67.0 mol%. The isolate was also distinguishable from members of the genus Paracoccus on the basis of phenotypic and biochemical characteristics. It is evident from the genotypic, chemotaxonomic and phenotypic data, therefore, that strain JLT1284(T) represents a novel species of the genus Paracoccus, for which the name Paracoccus beibuensis sp. nov. is proposed. The type strain is JLT1284(T)=LMG 24871(T)=CGMCC 1.7295(T)).
从中国南海北部湾海域分离到一株能够积累聚-β-羟基丁酸（PHB）颗粒的革兰氏阴性、非运动、短杆状或球形细菌菌株。细胞没有极生或亚极生鞭毛，通过二分分裂进行分裂。基于 16S rRNA 基因序列的系统发育分析表明，该菌株在 Rhodobacteraceae 家族、Rhodobacterales 目、Alphaproteobacteria 类的 Paracoccus 属占据的进化辐射外围形成一个单系分支。最接近的近缘种是 Paracoccus aestuarii 菌株 B7(T)（97.2%相似度）、Paracoccus zeaxanthinifaciens ATCC 21588(T)（97.1%相似度）和 Paracoccus homiensis DD-R11(T)（96.8%相似度）。主要脂肪酸为 C(18:1) ω7c（82.1%），存在大量的 C(18:0)（5.6%）、C(10:0) 3-OH（2.3%）和 C(16:0)（1.5%）。菌株 JLT1284(T)的主要呼吸醌为 Q-10，菌株 JLT1284(T)的 DNA G+C 含量为 67.0 mol%。该分离株还可以根据表型和生化特征与 Paracoccus 属的成员区分开来。因此，从基因型、化学分类学和表型数据来看，菌株 JLT1284(T)代表 Paracoccus 属的一个新种，提议将其命名为 Paracoccus beibuensis sp. nov.。模式菌株为 JLT1284(T)=LMG 24871(T)=CGMCC 1.7295(T))。
