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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo

Volume 71, Issue 9

gen. nov., sp. nov., an anaerobic, pyruvate-degrading bacterium from Shengli oilfield, and proposal of fam. nov. in the phylum No Access

Abstract

A strictly anaerobic, thermophilic, Gram-stain-negative bacterium, named as strain S15, was isolated from oily sludge of Shengli oilfield in PR China. Cells of strain S15 were straight or slightly curved rods with 0.4–0.8 µm width × 1.4–3 µm length and occurred mostly in pairs or short chains. Endospore-formation was not observed. The strain grew optimally at 55 °C (range from 30–65 °C), pH 6.5 (pH 6.0–8.5) and 0–30 g l NaCl (optimum with 10 g l NaCl). Yeast extract was an essential growth factor for strain S15. The major cellular fatty acid was iso-C (58.2 %), and the main polar lipids were amino phospholipid (APL), glycolipids (GLs) and phosphatidylethanolamine (PE). The G+C content of DNA of strain S15 was 52.2 mol%. Strain S15 shared 89.8 % 16S rRNA gene similarity with the most related organism DSM 22491 in the phylum . The paired genomic average amino acid identity (AAI) and percentage of conserved proteins (POCP) values showed relatedness of less than 58.0 and 39.7 % with type strains of the species in the phylum . On the basis of phenotypic, phylogenetic and phylogenomic evidences, strain S15 constitutes a novel species in a novel genus, for the name gen. nov., sp. nov. is proposed. The type strain is S15 (=CCAM 583=JCM 33159). fam. nov. is also proposed.

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Keyword(s): Thermosynergistaceae fam. nov and Thermosynergistes pyruvativorans
Funding
This study was supported by the:
  • Central Public-interest Scientific Institution Basal Research Fund, Chinese Academy of Fishery Sciences (CN) (Award 1610012017002_05103, Y2021PT02)
    • Principle Award Recipient: LeiCheng
  • Agricultural Science and Technology Innovation Project of the Chinese Academy of Agriculture Science (Award CAAS-ASTIP-2016-BIOMA)
    • Principle Award Recipient: LeiCheng
  • Sichuan Science and Technology Program (Award 2019YFH0037)
    • Principle Award Recipient: LeiCheng
  • National Natural Science Foundation of China (Award 92051108，31570009)
    • Principle Award Recipient: LeiCheng
© 2021 The Authors
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Thermosynergistes pyruvativorans gen. nov., sp. nov., an anaerobic, pyruvate-degrading bacterium from Shengli oilfield, and proposal of Thermosynergistaceae fam. nov. in the phylum Synergistetes
Int J Syst Evol Microbiol 71, 005031 (2021); https://doi.org/10.1099/ijsem.0.005031
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