1887

Abstract

A novel Gram-stain-negative, aerobic, motile by peritrichous flagella, oval to rod-shaped bacterium, designated strain 2CG4, was isolated from a deep-sea water sample collected from the Northwest Indian Ocean. The results of phylogenetic analysis of both 16S rRNA gene and RpoC protein sequences indicated that this strain was affiliated with the genus in the clade of the family of the class , sharing 95.3 % similarity at the 16S rRNA gene sequence level with the type strain of YYQ-30, the only species in the genus . The predominant fatty acids (>10 %) of 2CG4 were summed feature 8 (Cω7 and/ or Cω6; 61.1 %) and -Cω8 (15.6 %). The polar lipids of 2CG4 were phosphatidylethanolamine, phosphatidylmethylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylcholine and sulfoquinovosyldiacylglycerol. The only isoprenoid quinone of 2CG4 was ubiquinone-10. The DNA G+C content of 2CG4 was determined to be 69.4 %. The central gene for the photosynthetic reaction was not detected. No growth occurred for 2CG4 in the absence of NaCl. On the basis of these data, it is concluded that the 2CG4 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is 2CG4 (=CGMCC 1.16468=JCM 32611).

Funding
This study was supported by the:
  • National Natural Science Foundation of China (Award 91951105)
    • Principle Award Recipient: Xin Dai
  • Senior User Project of RV KEXUE (Award KEXUE2019GZ05 and KEXUE2019G03)
  • China Ocean Mineral Resources R&D Association (Award DY135-B-02)
    • Principle Award Recipient: Li Huang
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2020-06-26
2021-08-02
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