ABSTRACT: Synergistic enhancement of caproate production via biochar-iron composites: mechanistic insights into microbial community regulation and direct electron transfer
Project description:Geobacter species are of great interest for environmental and biotechnology applications as they can carry out direct electron transfer to insoluble metals or other microorganisms and have the ability to assimilate inorganic carbon. Here, we report on the capability and key enabling metabolic machinery of Geobacter metallireducens GS-15 to carry out CO2 fixation and direct electron transfer to iron. An updated metabolic reconstruction was generated, growth screens on targeted conditions of interest were performed, and constraint-based analysis was utilized to characterize and evaluate critical pathways and reactions in G. metallireducens. The novel capability of G. metallireducens to grow autotrophically with formate and Fe(III) was predicted and subsequently validated in vivo. Additionally, the energetic cost of transferring electrons to an external electron acceptor was determined through analysis of growth experiments carried out using three different electron acceptors (Fe(III), nitrate, and fumarate) by systematically isolating and examining different parts of the electron transport chain. The updated reconstruction will serve as a knowledgebase for understanding and engineering Geobacter and similar species.
Project description:Differential expression of electron transfer genes during growth with insoluble iron provided as an electron acceptor compared to soluble iron.
2014-10-01 | GSE59467 | GEO
Project description:Biochar accelerates methane production efficiency from wastewater: some viewpoints considering direct interspecies electron transfer
| PRJNA1132402 | ENA
Project description:Biochar facilitating electron transfer of anaerobic granular sludge
| PRJNA782355 | ENA
Project description:Magnetotactic bacteria mediate Direct Interspecies Electron Transfer
Project description:Differential expression of electron transfer genes during growth with insoluble iron provided as an electron acceptor compared to soluble iron. A four chip study using total RNA recovered from two separate cultures of Ferroglobus placidus DSM 10642 grown with 10 mM acetate provided as electron donor and insoluble iron hydroxide provided as electron acceptor (experimental condition) and two separate cultures of Ferroglobus placidus DSM 10642 grown on 10 mM acetate with soluble iron citrate provided as electron acceptor (control condition). Each chip measures the expression level of 2613 genes from Ferroglobus placidus DSM 10642 with nine 45-60-mer probe pairs (PM/MM) per gene, with three-fold technical redundancy.
