Metabolic networks of electricigens Shewanella for anaerobic respiration

Shewanella oneidensis MR-1 is a model strain of electricigens Shewanella, which are widely distributed in natural water environments. As a facultative anaerobic bacterium, Shewanella is capable of using a multitude of electron acceptors to anaerobic respiration. Through the complex electron transport network composed by diverse cytochromes, Shewanella can not only reduce soluble electron acceptors permeating the periplasm, but also utilize insoluble electron acceptors extracellularly via transmembrane electron conduit. Here, this paper provides an overview of recent progress in the study about anaerobic metabolic pathways of Shewanella and is helpful for exploring the importance of electronic delivery network to the respiratory diversity and environmental adaptability of Shewanella.