4.4 Article

Methanolobus psychrotolerans sp nov., a psychrotolerant methanoarchaeon isolated from a saline meromictic lake in Siberia

出版社

MICROBIOLOGY SOC
DOI: 10.1099/ijsem.0.002685

关键词

Archaea; methanogen; Methanolobus; saline meromictic lake; psychrotolerant; Lake Shira

资金

  1. Ministry of Education, Taiwan, ROC under the ATU plan
  2. thematic project of Taiwan-Russian Joint Project [NSC99-2923-B-001-001-MY3, NSC102-2923-B-001-004]
  3. Ministry of Science and Technology [MOST103/104/105/106-3113-M-005-001]
  4. Russian Foundation for Basic Research [16-05-00091]

向作者/读者索取更多资源

A psychrotolerant, methylotrophic methanogen, strain YSF-03(T), was isolated from the saline meromictic Lake Shira in Siberia. Cells of strain YSF-03(T) were non-motile, irregular cocci and 0.8-1.2 mu m in diameter. The methanogenic substrates utilized by strain YSF-03(T) were methanol and trimethylamine. The temperature range of growth for strain YSF-03(T) was from 0 to 37 degrees C. The optimum growth conditions were 30-37 degrees C, pH 7.0-7.4 and 0.17M NaCl. The G+C content of the genome of strain YSF-03(T) was 41.3 mol%. Phylogenetic analysis revealed that strain YSF-03(T) was most closely related to Methanolobus profundi MobM(T) (98.15% similarity in 16S rRNA gene sequence). Genome relatedness between strain YSF-03(T) and MobM(T) was computed using the Genome-to-Genome Distance Calculator and average nucleotide identity, which gave values of 23.5 and 79.3 %, respectively. Based on the morphological, phenotypic, phylogenetic and genomic relatedness data presented here, it is evident that strain YSF-03(T) represents a novel species of the genus Methanolobus, for which the name Methanolobus psychrotolerans sp. nov. is proposed. The type strain is YSF-03(T) (= BCRC AR10049(T) = DSM 104044(T) = NBRC 112514(T)).

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