Figure 3

The pathways of energy metabolism in Pelobacter propionicus and the differences from respiratory Geobacteraceae species. Shown are the pathways of butanediol and acetoin fermentation used by P. propionicus. Vertically-inherited enzymes with orthologs in the other Geobacteraceae are shown in black. Both the vertically-inherited NADH dehydrogenase and ATP synthase have been duplicated in P. propionicus and these are shown in dark grey. Enzymes acquired by lateral gene transfer are shown in red: 1) butanediol dehydrogenase, 2) acetoin dehydrogenase, 3) pyruvate:ferredoxin oxidoreductase, 4) transcarboxylase, and 5) methylmalonyl-CoA mutase, and an ATP synthase. Enzymes conserved in the respiratory Geobacteraceae but lost in P. propionicus are shown in white. Reactions with multiple enzymes encoded in the genome for which there are diverse conservation patterns are shown as dashed arrows.