Description of Luteithermobacter gelatinilyticus gen. nov., sp. nov., and Paremcibacter congregatus gen. nov., comb. nov. via reclassification of the genus Emcibacter

International Journal of Systematic and Evolutionary Microbiology
Mi-Jeong ParkKae Kyoung Kwon

Abstract

Strain MEBiC09520T, which was isolated from a tidal sediment in Incheon, Korea, is a pale yellow, rod-shaped bacterium, cells of which are 0.4-0.5 µm in width and 1.5-2 µm in length. Strain MEBiC09520T shared 95.17 and 92.57% 16S rRNA gene sequence similarity with Emcibacter nanhaiensis and E. congregatus, respectively. It grew optimally at pH 6.0, at 55 °C and with 2.5-3.5% (w/v) NaCl. Its polar lipid components included phosphatidylethanolamine (PE), diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), an unidentified phospholipid (PL), three unidentified aminolipids (ALs) and two unidentified lipids (L). The fatty acids C16:0, C19:0 cyclo ω8c, C14:0 2-OH and summed feature 8 (C18:1ω7c and/or C18:1ω6c) were predominantly present in its cell wall. Strain MEBiC09520T was thermophilic, while E. nanhaiensis and E. congregatus were mesophilic. Although E. nanhaiensis showed no nitrate reduction activity, MEBiC09520T and E. congregatus showed a positive reaction. These strains differed in carbohydrate utilization. In particular, E. congregatus was able to thrive on various carbohydrate substrates as compared to the other strains. The average nucleotide identity value was 69.92% between strain MEBiC09520T and E. congregatus ZYLT...Continue Reading

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