Cytochrome c-type biogenesis protein CcmB (IPR003544)

Short name: Cyt_c_biogenesis_CcmB

Overlapping homologous superfamilies


Family relationships


This entry represents cytochrome c-type biogenesis protein CcmB (HelB) from bacteria and plants.

CcmB is the product of one of a cluster of ccm genes that are necessary for cytochrome c biosynthesis in bacteria and is required for the export of haem to the periplasm [PMID: 7635817]. Plant mitochondria have kept a cytochrome c biogenesis pathway inherited from their prokaryote ancestor and also have a CcmB homologue, but in plants the ccm genes are distributed between the nuclear and the mitochondrial genomes instead of being coded in a single operon [PMID: 11418186, PMID: 18033741].

GO terms

Biological Process

GO:0017004 cytochrome complex assembly
GO:0015886 heme transport

Molecular Function

GO:0015232 heme transporter activity

Cellular Component

GO:0016020 membrane

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.