HAMAP

Accession	MF_00643
Dates	26-MAY-2003 (Created) 10-OCT-2011 (Last updated, Version 35)

Data class

Protein

Predictors

HAMAP; MF_00643; [distribution of match scores in UniProtKB];[seed alignment for MF_00643]

Names

PSII_PsbF

Identifier

PSBF

Protein name

RecName: Full=Cytochrome b559 subunit beta; AltName: Full=PSII reaction center subunit VI;

Gene name

psbF

FUNCTION: This b-type cytochrome is tightly associated with the reaction center of photosystem II and possibly is part of the water-oxidation complex (By similarity).

SUBUNIT: Heterodimer of an alpha subunit and a beta subunit (By similarity).

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

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

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

SIMILARITY: Belongs to the psbE/psbF family.

Pfam	PF00283; Cytochrom_B559; 1;
PIRSF	PIRSF000037; PsbF; 1;
TIGRFAMs	TIGR01333; Cyt_b559_beta; 1;
PROSITE	PS00537; CYTOCHROME_B559; 1;

Photosynthesis, Photosystem II, Heme, Iron, Metal-binding, Transport, Electron transport.

Cell membrane, Cell inner membrane.

Thylakoid.

Membrane, Transmembrane, Transmembrane helix.

GO:0009055; Molecular function: electron carrier activity.
GO:0005506; Molecular function: iron ion binding.
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.

From: PSBF_SYNY3 (P09191)
Key		From		To		Description		Condition		FTGroup
TOPO_DOM		Nter		18		Stromal (Potential)
TRANSMEM		19		39		Helical; (Potential)
TOPO_DOM		40		Cter		Lumenal (Potential)
METAL		23		23		Iron (heme axial ligand); shared with alpha subunit (By similarity)		H

Size range:	38-51 amino acids
Related UniRules:	MF_00642 (PSBE)
Template:	P09191 (PSBF_SYNY3); Q8DIN9 (PSBF_THEEB): [Recover all]
Scope:	Bacteria; Cyanobacteria Plastid
Fusion:	Nter: None; Cter: None
Duplicate:	None
Plasmid encoded:	None