Shewanella oneidensis is an important model organism for bioremediation studies 
because of its diverse respiratory capabilities, conferred in part by 
multicomponent, branched electron transport systems. Here we report the 
sequencing of the S. oneidensis genome, which consists of a 4,969,803-base pair 
circular chromosome with 4,758 predicted protein-encoding open reading frames 
(CDS) and a 161,613-base pair plasmid with 173 CDSs. We identified the first 
Shewanella lambda-like phage, providing a potential tool for further genome 
engineering. Genome analysis revealed 39 c-type cytochromes, including 32 
previously unidentified in S. oneidensis, and a novel periplasmic [Fe] 
hydrogenase, which are integral members of the electron transport system. This 
genome sequence represents a critical step in the elucidation of the pathways 
for reduction (and bioremediation) of pollutants such as uranium (U) and 
chromium (Cr), and offers a starting point for defining this organism's complex 
electron transport systems and metal ion-reducing capabilities.