HAMAP

Accession	MF_01344
Dates	19-DEC-2005 (Created) 2-DEC-2010 (Last updated, Version 21)

Data class

Protein

Predictors

HAMAP; MF_01344; [distribution of match scores in UniProtKB];[seed alignment for MF_01344]

Names

Cytb6_f_subIV

Identifier

PETD

Protein name

RecName: Full=Cytochrome b6-f complex subunit 4; AltName: Full=17 kDa polypeptide;

Gene name

petD

FUNCTION: Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions (By similarity).

SUBUNIT: The 4 large subunits of the cytochrome b6-f complex are cytochrome b6, subunit IV (17 kDa polypeptide, PetD), cytochrome f and the Rieske protein, while the 4 small subunits are PetG, PetL, PetM and PetN. The complex functions as a dimer (By similarity).

SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane; Multi-pass membrane protein (By similarity).

SUBCELLULAR LOCATION: Cell inner membrane; Multi-pass membrane protein (By similarity).

SUBCELLULAR LOCATION: Cellular thylakoid membrane; Multi-pass membrane protein (By similarity).

SIMILARITY: Belongs to the cytochrome b family. PetD subfamily.

PROSITE	PS51003; CYTB_CTER; 1;
Pfam	PF00032; Cytochrom_B_C; 1;
TIGRFAMs	TIGR01156; cytb6/f_IV; 1;
General	Transmembrane; -; 3; trigger=Yes;

Electron transport.

Cell membrane, Cell inner membrane.

Thylakoid.

Membrane, Photosynthesis, Transmembrane, Transport, Transmembrane helix.

GO:0045158; Molecular function: electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity.
GO:0015979; Biological process: photosynthesis.
GO:0055114; Biological process: oxidation-reduction process.

GO:0009535; Cellular component: chloroplast thylakoid membrane.

GO:0005886; Cellular component: plasma membrane.

GO:0042651; Cellular component: thylakoid membrane.

Size range:	157-189 amino acids
Related UniRules:	None
Template:	P83792 (PETD_MASLA); P23230 (PETD_CHLRE): [Recover all]
Scope:	Bacteria; Cyanobacteria Plastid
Fusion:	Nter: None; Cter: None
Duplicate:	None
Plasmid encoded:	None
Comments:	In barley and maize a longer, unspliced form of the gene is transcribed. It can also be predicted for at least rice and lettuce, and probably other Magnoliophytes. It is not known is this RNA is translated.