Fig. 7
From: Effects of CO2 limitation on the metabolism of Pseudoclostridium thermosuccinogenes
Overview of major (trans) hydrogenase reactions involving ferredoxin in P. thermosuccinogenes. Arrow represent the flow of electrons. PFOR: pyruvate:ferredoxin oxidoreductase; Flx-Hdr: NADH dehydrogenase/heterodisulfide reductase bifurcation complex; NFN: NADH-dependent reduced ferredoxin: NADP+ oxidoreductase; RNF: ion-translocating reduced ferredoxin: NAD+ oxidoreductase; ECH: energy-converting [NiFe] hydrogenase; Hyd: hydrogenase; bif-Hyd: bifurcating hydrogenase. Differential expression of the corresponding genes (and their locus tags) are presented in Fig. 5. It is not entirely clear what hydrogenases are present besides ECH. The presence of several genes potentially encoding hydrogenases, and of [FeFe] hydrogenase maturation factors does suggest P. thermosuccinogenes possesses additional hydrogenases