Cytochrome b6/f complex, subunit 5 (IPR003683)

Short name: Cyt_6/f_cplx_su5

Overlapping homologous superfamilies

Family relationships



This family consists of cytochrome b6/f complex subunit 5 (PetG). The cytochrome bf complex, found in green plants, eukaryotic algae and cyanobacteria, connects photosystem I to photosystem II in the electron transport chain, functioning as a plastoquinol:plastocyanin/cytochrome c6 oxidoreductase [PMID: 7493961]. The purified complex from the unicellular alga Chlamydomonas reinhardtii contains seven subunits; namely four high molecular weight subunits (cytochrome f, Rieske iron-sulphur protein, cytochrome b6, and subunit IV) and three approximately miniproteins (PetG, PetL, and PetX) [PMID: 7493968]. Stoichiometry measurements are consistent with every subunit being present as two copies per b6/f dimer. The absence of PetG affects either the assembly or stability of the cytochrome bf complex in C. reinhardtii [PMID: 7493961].

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

No terms assigned in this category.

Cellular Component

GO:0009512 cytochrome b6f complex

Contributing signatures

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