Cell-Surface Inter-Cytochrome Electron Transfer Limits Biofilm Electron Conduction Kinetics in <i>Shewanella oneidensis</i>.

ABSTRACT: The electrical conductivity of biofilms plays a critical role in advancing bioelectronics for energy and environmental applications, yet the underlying mechanisms remain poorly understood. Previous studies proposed interheme electron transfer between hemes 5 and 10 in the outer-membrane deca-heme cytochrome (OMC) MtrC as the rate-limiting step in the biofilm electron conduction of Shewanella oneidensis MR-1. However, the strong interheme electron coupling in MtrC suggests that interprotein interactions may represent the primary barrier to biofilm electron conduction. Here, we investigated the biofilm electron conduction mechanism with a focus on interprotein electron transfer in S. oneidensis MR-1. Conductive currents and their temperature dependence were measured for estimat

SUBMITTER: Wen X 

PROVIDER: S-EPMC12750994 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature