Open AccessTautonia sociabilis gen. nov., sp. nov., a novel thermotolerant planctomycete, isolated from a 4000 m deep subterranean habitat
Author(s) -
Olga L. Kovaleva,
Alexander G. Elcheninov,
Stepan V. Toshchakov,
А. А. Новиков,
E. A. Bonch-Osmolovskaya,
Ilya V. Kublanov
Publication year - 2019
Publication title -
international journal of systematic and evolutionary microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 173
eISSN - 1466-5034
pISSN - 1466-5026
DOI - 10.1099/ijsem.0.003467
Subject(s) - biology , 16s ribosomal rna , strain (injury) , bacteria , budding , gene , microbiology and biotechnology , botany , genetics , anatomy
A novel aerobic bacterium, designated as strain GM2012 T , was isolated from a microbial mat proliferating under the flow of thermal water dissipating from the wall of a 4000 m deep mine in South Africa. The cells were non-motile cocci, capable of budding, occurred in single or gathered in aggregates. The organism is a strictly aerobic chemoorganoheterotroph, preferring simple sugars and polysaccharides as growth substrates. The optimal growth occurred at 42 °C and pH 7.5-7.7. The predominant fatty acids were palmitate, stearate and oleate. The G+C content of the DNA was 70.1 mol%. The 16S rRNA gene sequence analysis placed strain GM2012 T within the family Isosphaeraceae of the order Planctomycetales with 88-89 % sequence identity to Isosphaera pallida, Aquisphaeragiovannonii, Singulisphaera acidiphila, Paludisphaera borealis and Tundrisphaera lichenicola type strains. Based on the genotypic and phenotypic distinctive features of the new strain, we propose a novel genus and species Tautonia sociabilis gen. nov., sp. nov. with the type strain GM2012 T (=VKM B-2860,=KCTC 72013).