Heme exporter protein CcmB; Required for the export of heme to the periplasm for the biogenesis of c-type cytochromes; Belongs to the CcmB/CycW/HelB family.

Cytochrome c biogenesis protein CcmE; Heme chaperone required for the biogenesis of c-type cytochromes. Transiently binds heme delivered by CcmC and transfers the heme to apo-cytochromes in a process facilitated by CcmF and CcmH. Belongs to the CcmE/CycJ family.

Heme ABC transporter ATP-binding protein CcmA; Part of the ABC transporter complex CcmAB involved in the biogenesis of c-type cytochromes; once thought to export heme, this seems not to be the case, but its exact role is uncertain. Responsible for energy coupling to the transport system; Belongs to the ABC transporter superfamily. CcmA exporter (TC 3.A.1.107) family.

C-type cytochrome biogenesis protein CcmI; Derived by automated computational analysis using gene prediction method: Protein Homology.

Cytochrome c-type biogenesis protein; required for the transfer of heme to apocytochrome c; Derived by automated computational analysis using gene prediction method: Protein Homology.

Cystathionine gamma-synthase; Possible subunit of a heme lyase.

Thiol:disulfide interchange protein; Derived by automated computational analysis using gene prediction method: Protein Homology.

Ferric iron uptake transcriptional regulator; Derived by automated computational analysis using gene prediction method: Protein Homology; Belongs to the Fur family.

Energy transducer TonB; Interacts with outer membrane receptor proteins that carry out high-affinity binding and energy dependent uptake into the periplasmic space of specific substrates. It could act to transduce energy from the cytoplasmic membrane to specific energy-requiring processes in the outer membrane, resulting in the release into the periplasm of ligands bound by these outer membrane proteins. Belongs to the TonB family.