Issue 44, 2019, Issue in Progress

Characterization of the genome from Geobacter anodireducens, a strain with enhanced current production in bioelectrochemical systems

Abstract

Geobacter anodireducens is unique in that it can generate high current densities in bioelectrochemical systems (BES) operating under high salt conditions. This ability is important for the development of BES treating high salt wastewater and microbial desalination cells. Therefore, the genome of G. anodireducens was characterized to identify proteins that might allow this strain to survive in high salt BES. Comparison to other Geobacter species revealed that 81 of its 87 c-type cytochromes had homologs in G. soli and G. sulfurreducens. Genes coding for many extracellular electron transfer proteins were also detected, including the outer membrane c-type cytochromes OmcS and OmcZ and the soluble c-type cytochrome PgcA. G. anodireducens also appears to have numerous membrane complexes involved in the translocation of protons and sodium ions and channels that provide protection against osmotic shock. In addition, it has more DNA repair genes than most Geobacter species, suggesting that it might be able to more rapidly repair DNA damage caused in high salt and low pH anode environments. Although this genomic analysis provides invaluable insight into mechanisms used by G. anodireducens to survive in high salt BES, genetic, transcriptomic, and proteomic studies will need to be done to validate their roles.

Graphical abstract: Characterization of the genome from Geobacter anodireducens, a strain with enhanced current production in bioelectrochemical systems

Supplementary files

Article information

Article type
Paper
Submitted
27 Mar 2019
Accepted
20 Jul 2019
First published
19 Aug 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 25890-25899

Characterization of the genome from Geobacter anodireducens, a strain with enhanced current production in bioelectrochemical systems

D. Sun, X. Wan, W. Liu, X. Xia, F. Huang, A. Wang, J. A. Smith, Y. Dang and D. E. Holmes, RSC Adv., 2019, 9, 25890 DOI: 10.1039/C9RA02343G

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