Homologous Superfamily

Cytochrome c/b562 (IPR010980)

Short name: Cyt_c/b562

Overlapping entries


Cytochromes are haem-containing proteins that function as electron carriers during electron transfer reactions. Cytochromes can be divided into types depending upon how the haem atom is bound: in c-type cytochromes the haem is covalently attached to the polypeptide, while in b-type cytochromes the haem is not covalently attached. A four-helical bundle motif is found in several cytochromes, including the cytochrome c family (IPR002321), cytochrome b562 (IPR009155), and cytochrome b559, despite having very low sequence similarities. Cytochromes c and b562 are found in many bacteria and are probably involved in nitric oxide transfer [PMID: 12215425]. These proteins exhibit a reduction potential in the range of around 8mV to 400mV, which sets the energy yield possible in metabolism and is also a key determinant of the rate at which redox reactions proceed [PMID: 11914078].

GO terms

Biological Process

GO:0022900 electron transport chain

Molecular Function

GO:0009055 electron transfer activity
GO:0020037 heme binding
GO:0005506 iron ion binding

Cellular Component

No terms assigned in this category.

Contributing signatures

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