Metatranscriptomics Supports the Mechanism for Biocathode Electroautotrophy by “ Candidatus Tenderia electrophaga”
Abstract
Bacteria that directly use electrodes as metabolic electron donors (biocathodes) have been proposed for applications ranging from microbial electrosynthesis to advanced bioelectronics for cellular communication with machines. However, just as we understand very little about oxidation of analogous natural insoluble electron donors, such as iron oxide, the organisms and extracellular electron transfer (EET) pathways underlying the electrode-cell direct electron transfer processes are almost completely unknown. Biocathodes are a stable biofilm cultivation platform to interrogate both the rate and mechanism of EET using electrochemistry and to study the electroautotrophic organisms that catalyze these reactions. Here we provide new evidence supporting the hypothesis that the uncultured bacterium “ Candidatus Tenderia electrophaga” directly couples extracellular electron transfer to CO 2 fixation. Our results provide insight into developing biocathode technology, such as microbial electrosynthesis, as well as advancing our understanding of chemolithoautotrophy.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 21, 2017
- Source ID
- 10.1128/msystems.00002-17
Entities
People
- Anthony P. Malanoski
- Baochuan Lin
- Brian J Eddie
- Dagmar H Leary
- Leonard M. Tender
- Sarah M. Strycharz-glaven
- William Judson Hervey
- Zheng Wang
Organizations
- Office of Naval Research
- United States Naval Research Laboratory