Prof. Liang Shi
China University of Geosciences, Wuhan
Abstract: The electron exchanges between redox carriers in the microbial cytoplasmic membrane and extracellular substrates, such as Fe-bearing minerals, are often referred to as microbial extracellular electron transfer. To overcome the electrical and physical barrier external to the cytoplasmic membrane, microorganisms have evolved distinct mechanisms for electron exchange between the cytoplasmic membrane and extracellular substrates via a network of redox and structural proteins. These proteins often form pathways that electrically and physically connect the intracellular metabolic processes with the redox transformations of extracellular substrates. Over the past 20 years, substantial progress has been made in identification and characterization of microbial extracellular electron transfer pathways. Among them, the metal-reducing pathway of Shewanella oneidensis MR-1 is the most rigorously investigated and best characterized microbial extracellular electron transfer pathway. The microorganisms with extracellular electron transfer capabilities have also been employed for a variety of biotechnological applications, such as bioremediation of environmental contaminants, microbial fuel cells and electrobiosynthesis. In this session of Talk@EEH, I will first report my previous work at Pacific Northwest National Laboratory and then my current work at China University of Geosciences-Wuhan. The latter includes 1) extracellular electron transfer pathway of Acidithiobacillus ferrooxidans for Fe(II) oxidation, 2) extracellular electron transfer pathways of S. oneidensis MR-1for iodate reduction, 3) the roles of nanowires in the co-culture of Geobacter species and 4) biotechnological applications of S. oneidensis MR-1 and Geobacter species.
Host：Prof. Xubo Gao
China University of Geosciences, Wuhan
EEH Early Career Board Member
Time：09:00am April 20, 2023 (Beijing time)
Zoom ID: 816 9975 7155
Bilibili: 25002335
