HAMAP

Accession	MF_01378
Dates	28-JUN-2007 (Created) 25-NOV-2009 (Last updated, Version 16)

Data class

Protein

Predictors

HAMAP; MF_01378; [distribution of match scores in UniProtKB];[seed alignment for MF_01378]

Names

PSII_Cyt550

Identifier

CY550

Protein name

RecName: Full=Cytochrome c-550; AltName: Full=Cytochrome c550; AltName: Full=Low-potential cytochrome c; Flags: Precursor;

Protein name

RecName: Full=Cytochrome c-550; AltName: Full=Cytochrome c550; Flags: Precursor;

Gene name

psbV

FUNCTION: Low-potential cytochrome c that plays a role in the oxygen-evolving complex of photosystem II (By similarity).

COFACTOR: Binds 1 heme group covalently per subunit (By similarity).

SUBUNIT: Part of the oxygen-evolving complex of photosystem II (By similarity).

SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane; Peripheral membrane protein; Lumenal side (By similarity). Note=Associated with photosystem II at the lumenal side of the thylakoid membrane (By similarity).

SUBUNIT: The cyanobacterial oxygen-evolving complex is composed of psbO, psbP, psbQ, psbV and psbU (Potential).

SUBCELLULAR LOCATION: Cell inner membrane; Peripheral membrane protein; Extracellular side (By similarity). Note=Associated with photosystem II at the extracellular side of the inner membrane (Potential).

SUBUNIT: The cyanobacterial oxygen-evolving complex is composed of psbO, psbP, psbQ, psbV and psbU (Potential).

SUBCELLULAR LOCATION: Cellular thylakoid membrane; Peripheral membrane protein; Lumenal side (By similarity). Note=Associated with photosystem II at the lumenal side of the thylakoid membrane (By similarity).

SIMILARITY: Belongs to the cytochrome c family. PsbV subfamily.

PROSITE	PS51007; CYTC; 1;
Pfam	PF00034; Cytochrom_C; 1;
General	Signal; -; 1; trigger=Yes;

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

Cell membrane, Cell inner membrane.

Thylakoid.

Membrane, Transport.

GO:0019684; Biological process: photosynthesis, light reaction.
GO:0018063; Biological process: cytochrome c-heme linkage.

GO:0009535; Cellular component: chloroplast thylakoid membrane.

GO:0005886; Cellular component: plasma membrane.

GO:0042651; Cellular component: thylakoid membrane.

From: CY550_THEEB (P0A386)
Key		From		To		Description		Condition		FTGroup
METAL		67		67		Iron (heme axial ligand) (By similarity)		H
METAL		118		118		Iron (heme axial ligand) (By similarity)		H
BINDING		63		63		Heme (covalent) (By similarity)		C
BINDING		66		66		Heme (covalent) (By similarity)		C

Size range:	129-186 amino acids
Related UniRules:	None
Template:	P0A386 (CY550_THEEB)
Scope:	Bacteria; Cyanobacteria Plastid
Fusion:	Nter: None; Cter: None
Duplicate:	in GLOVI, THEEB, SYNJA, SYNJB, SYNVU, TRIEI
Plasmid encoded:	None
Comments:	In land plants cytochrome c-550 and the 12 kDa protein (psbU) are replaced by psbP and psbQ. The oxygen-evolving complex in Cyanidium caldarium is composed of 4 proteins (psbO, psbQ, psbU and cytochrome c- 550); it is not yet known what composes the complex in other algae. For a review see: PubMed=17200881; DOI=10.1007/s11120-006-9117-1; Roose J.L., Wegener K.M., Pakrasi H.B.; "The extrinsic proteins of Photosystem II."; Photosyn. Res. 92:369-387(2007). MICAE and SPIMA have been included in the seed despite being only the mature protein. The second copies (psbV2) and proteins in GLOVI look quite different and perhaps should be a different subfamily.