Barstow Research Team

Department of Chemistry, Princeton University

Extracellular Electron Transfer

Shewanella oneidensis and other electroactive microorganisms possess a complex set of genes necessary for extracellular electron transfer (EET). Of particular interest are those genes required for electron uptake, as we can envision a role of S. oneidensis in the uptake of solar electricity from highly efficient photovoltaics for subsequent energy storage. However, our knowledge of the full complement of electron uptake genes is still incomplete, which hinders our capacity to optimize microbial electrosynthesis.

We are investigating EET, both the uptake and outflow processes, using high-throughput genetic screens to identify genes important for EET and understand whether we can optimize electron uptake to couple it to microbial growth, thus laying the groundwork for efficient energy storage to help solve problems in global sustainable energy.