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Alkane inducible proteins in Geobacillus thermoleovorans B23

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Title: Alkane inducible proteins in Geobacillus thermoleovorans B23
Authors: Kato, Tomohisa Browse this author
Miyanaga, Asuka Browse this author
Kanaya, Shigenori Browse this author
Morikawa, Masaaki Browse this author →KAKEN DB
Issue Date: 25-Mar-2009
Publisher: BioMed Central Ltd.
Journal Title: BMC Microbiology
Volume: 9
Start Page: 60
Publisher DOI: 10.1186/1471-2180-9-60
Abstract: Background: Initial step of β-oxidation is catalyzed by acyl-CoA dehydrogenase in prokaryotes and mitochondria, while acyl-CoA oxidase primarily functions in the peroxisomes of eukaryotes. Oxidase reaction accompanies emission of toxic by-product reactive oxygen molecules including superoxide anion, and superoxide dismutase and catalase activities are essential to detoxify them in the peroxisomes. Although there is an argument about whether primitive life was born and evolved under high temperature conditions, thermophilic archaea apparently share living systems with both bacteria and eukaryotes. We hypothesized that alkane degradation pathways in thermophilic microorganisms could be premature and useful to understand their evolution. Results: An extremely thermophilic and alkane degrading Geobacillus thermoleovorans B23 was previously isolated from a deep subsurface oil reservoir in Japan. In the present study, we identified novel membrane proteins (P16, P21) and superoxide dismutase (P24) whose production levels were significantly increased upon alkane degradation. Unlike other bacteria acyl-CoA oxidase and catalase activities were also increased in strain B23 by addition of alkane. Conclusion: We first suggested that peroxisomal β-oxidation system exists in bacteria. This eukaryotic-type alkane degradation pathway in thermophilic bacterial cells might be a vestige of primitive living cell systems that had evolved into eukaryotes.
Rights: http://creativecommons.org/licenses/by/2.0
Type: article
URI: http://hdl.handle.net/2115/38519
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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