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Hydrogenobacter thermophilus
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・ Hydrogenophaga pseudoflava
・ Hydrogenophaga taeniospiralis
・ Hydrogenophilaceae


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Hydrogenobacter thermophilus : ウィキペディア英語版
Hydrogenobacter thermophilus

''Hydrogenobacter thermophilus'' is an extremely thermophilic, straight rod (bacillus) bacterium.〔 TK-6 is the type strain for this species. It is a Gram negative, non-motile, obligate chemolithoautotroph.〔 It belongs to one of the earliest branching order of Bacteria.〔 ''H. thermophilus'' TK-6 lives in soil that contains hot water.〔 It was one of the first hydrogen oxidizing bacteria described leading to the discovery, and subsequent examination of many unique proteins involved in its metabolism.〔 Its discovery contradicted the idea that no obligate hydrogen oxidizing bacteria existed, leading to a new understanding of this physiological group.〔 Additionally, ''H. thermophilus'' contains a fatty acid composition that had not be observed before.〔
==History==

''Hydrogenobacter thermophilus'' TK-6 was originally discovered by Toshiyuki Kawasumi at the Department of Agricultural Chemistry, University of Tokyo in 1980.〔 TK-6 was found with four other previously unknown hydrogen oxidizing bacteria.〔 The bacterium was isolated from hot water containing soils samples from mines of the Izu Peninsula, Japan.〔 The colonies were isolated onto a medium made of 1.5% Bacto-Agar and a specific trace element solution consisting of MoO3, ZnSO4·H2O, CuSO4·5H2O, H3BO3, MnSO4·H2O and CoCl2·H2O. Prior to the discovery of ''Hydrogenobacter thermophilus'', only one extremely thermophilic, aerobic and hydrogen-oxidizing bacterium had been described (''Bacillus schlegelii'').〔 In addition, ''H. thermophilus'' has both morphological and physiological differences that vary from processes in ''B. schegelii'', suggesting there are multiple means for being viable in different environments.〔 Until the discovery of ''H. thermophilus'', it was thought that no obligate chemolithotrophic hydrogen oxidizing bacteria existed.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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