Paracoccus tibetensis sp nov., isolated from Qinghai-Tibet Plateau permafrost

Strain Tibet-S9a3(T) was isolated from Qinghai-Tibet Plateau permafrost, China. The isolate was a Gram-negative, non-motile, non-spore-forming short rod. The 16S rRNA gene sequence indicated that strain Tibet-S9a3(T) was a member of the genus Paracoccus and was closely related to Paracoccus aestuarii B7(T) (98.2 % 16S rRNA gene sequence similarity), 'P. beibuensis' JLT1284 (97.9%), P. homiensis DD-R11(T) (97.4 %), P. zeaxanthinifaciens ATCC 21588(T) (97.4 %) and other type strains of the genus (93.7-96.7%). The G+C content of the genomic DNA was 69.1 mol% and the major isoprenoid quinone was ubiquinone-10. The major fatty acids were C-18:1 omega 7c (87.6 %), C-18:0 (4.3 %) and C-10:0 3-OH (2.0%). DNA-DNA relatedness between strain Tibet-S9a3(T) and P. aestuarii B7(T) was 37.9 %. On the basis of phenotypic and genotypic characteristics, it is suggested that strain Tibet-S9a3(T) represents a novel species of the genus Paracoccus, for which the name Paracoccus tibetensis sp. nov. is proposed. The type strain is Tibet-S9a3(T) (=CGMCC 1.8925(T) =NBRC 105667(T)).