Anaerobic respiratory capabilities of a metal-reducing microorganism Shewanella and its application in environmental remediation

Shewanella oneidensis MR-1,a model dissimilatory metal-reducing bacterium,can effectively utilize many metal compounds and artificial synthetic dyes as electron acceptors to anaerobic respiration.Therefore,it is often used in the study of environmental remediation.Under anaerobic condition,electrons,produced by catabolism of carbon source in cytoplasm of S.oneidensis MR-1,are transferred through multiple electron transfer systems which were composed by 42 types of c-type cytochromes or reductases located in inner membrane to outer membrane,and finally to electron acceptors out of the cells.In this review,types of electron transfer mechanism for anaerobic respiration are introduced to facilitate a deeper understanding to the mechanism of pollutant biodegradation and nanomaterial synthesis.Thus,this review is beneficial to providing an adequate theoretical basis for the application of this strain in bioremediation