Comparative genomic analysis of Geosporobacter ferrireducens and its versatility of anaerobic energy metabolism

Man-Young Jung; So-Jeong Kim; Jong-Geol Kim; Heeji Hong; Joo-Han Gwak; Soo-Je Park; Yang-Hoon Kim; Sung-Keun Rhee

doi:10.1007/s12275-018-7451-6

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Comparative genomic analysis of Geosporobacter ferrireducens and its versatility of anaerobic energy metabolism: Man-Young Jung ¹, So-Jeong Kim ², Jong-Geol Kim ³, Heeji Hong ³, Joo-Han Gwak ³, Soo-Je Park ⁴, Yang-Hoon Kim ³, Sung-Keun Rhee ³; Journal of Microbiology 2018;56(5):365-371.
DOI: https://doi.org/10.1007/s12275-018-7451-6
Published online: May 2, 2018

¹Department of Microbiology and Ecosystem Science, Division of Microbial Ecology, University of Vienna, A-1090 Vienna, Austria, ²Geologic Environment Research Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Republic of Korea, ³Department of Microbiology, Chungbuk National University, Cheongju 28644, Republic of Korea, ⁴Department of Biology, Jeju National University, Jeju 63243, Republic of Korea¹Department of Microbiology and Ecosystem Science, Division of Microbial Ecology, University of Vienna, A-1090 Vienna, Austria, ²Geologic Environment Research Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Republic of Korea, ³Department of Microbiology, Chungbuk National University, Cheongju 28644, Republic of Korea, ⁴Department of Biology, Jeju National University, Jeju 63243, Republic of Korea

Corresponding author: So-Jeong Kim , Tel: +82-42-868-3311,
Sung-Keun Rhee , Tel: +82-42-868-3311,

Received: 25 October 2017 • Revised: 27 February 2018 • Accepted: 27 February 2018

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Abstract

Members of the family Clostridiaceae within phylum Firmicutes are ubiquitous in various iron-reducing environments. However, genomic data on iron-reducing bacteria of the family Clostridiaceae, particularly regarding their environmental distribution, are limited. Here, we report the analysis and comparison of the genomic properties of Geosporobacter ferrireducens IRF9, a strict anaerobe that ferments sugars and degrades toluene under iron-reducing conditions, with those of the closely related species, Geosporobacter subterraneus DSM 17957. Putative alkyl succinate synthase-encoding genes were observed in the genome of strain IRF9 instead of the typical benzyl succinate synthase-encoding genes. Canonical genes associated with iron reduction were not observed in either genome. The genomes of strains IRF9 and DMS 17957 harbored genes for acetogenesis, that encode two types of Rnf complexes mediating the translocation of H+ and Na+ ions, respectively. Strain IRF9 harbored two different types of ATPases (Na+-dependent F-type ATPase and H+- dependent V-type ATPase), which enable full exploitation of ion gradients. The versatile energy conservation potential of strain IRF9 promotes its survival in various environmental conditions.

Keywords: Geosporobacter ferrireducens IRF9;Geosporobacter subterraneus DSM 17957;comparative genomics;ATPase;Rnf complex;toluene

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Comparative genomic analysis of Geosporobacter ferrireducens and its versatility of anaerobic energy metabolism

J. Microbiol. 2018;56(5):365-371. Published online May 2, 2018

DOI: https://doi.org/10.1007/s12275-018-7451-6

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