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Volume 68, Issue 11

Geobacillus yumthangensis sp. nov., a thermophilic bacterium isolated from a north-east Indian hot spring Free

Abstract

A thermophilic, spore-forming, rod-shaped bacterium isolated from the Yumthang hot spring in North Sikkim, India was subjected to taxonomic studies. The thermophilic bacterial isolate was designated as strain AYN2. Cells were Gram-stain-positive, aerobic, motile, rod-shaped, catalase-positive and methyl red-negative. Strain AYN2 was able to grow in the pH range from 6 to 10 (optimum, pH 7.5–8.0), at 40–70 °C (60 °C) and in NaCl concentrations of 0–4 % (1 %). The major cellular fatty acids were iso-C15 : 0 (12.8 %), iso-C16 : 0 (13.9 %) and iso-C17 : 0 (13.8 %). No matches were found in the rtsba6 Sherlock libraries. The G+C content of the genomic DNA was 42.11 mol%. Based on phylogenetic analysis of the 16S rRNA gene sequences, strain AYN showed highest sequence similarity to the type strain of Geobacillus toebii (96 %). However, the phenotypic properties of strain AYN2 were clearly distinct from those of G. toebii and related species. On the basis of polyphasic analysis, strain AYN2 represents a novel species in the genus Geobacillus , for which the name Geobacillus yumthangensis sp. nov. is proposed. The type strain is AYN2(MTCC=12749=KCTC=33950= JCM 32596).

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Keyword(s): Geobacillus yumthangensis sp. nov. , hot spring , polyphasic taxonomy , Sikkim and thermophiles
© 2018 IUMS
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2018-09-17
2024-04-19
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Geobacillus yumthangensis sp. nov., a thermophilic bacterium isolated from a north-east Indian hot spring
Int J Syst Evol Microbiol 68, 3430 (2018); https://doi.org/10.1099/ijsem.0.003002
/content/journal/ijsem/10.1099/ijsem.0.003002
/content/journal/ijsem/10.1099/ijsem.0.003002
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