Q5N556 (PSBE_SYNP6) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Cytochrome b559 subunit alpha

Alternative name(s):
PSII reaction center subunit V

Gene names

Name:	psbE
Ordered Locus Names:	syc0373_d

Organism

Synechococcus sp. (strain ATCC 27144 / PCC 6301 / SAUG 1402/1) (Anacystis nidulans) [Complete proteome] [HAMAP]

Taxonomic identifier

269084 [NCBI]

Taxonomic lineage

cellular organisms › Bacteria › Cyanobacteria › Oscillatoriophycideae › Chroococcales › Synechococcus › Synechococcus elongatus

Protein attributes

Sequence length	83 AA.
Sequence status	Complete.
Protein existence	Inferred from homology

General annotation (Comments)

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. HAMAP-Rule MF_00642
Subunit structure	Heterodimer of an alpha subunit and a beta subunit By similarity.
Subcellular location	Cellular thylakoid membrane; Single-pass membrane protein By similarity HAMAP-Rule MF_00642.
Sequence similarities	Belongs to the PsbE/PsbF family.

Ontologies

Keywords
Biological process	Electron transport Photosynthesis Transport
Cellular component	Membrane Photosystem II Thylakoid
Domain	Transmembrane Transmembrane helix
Ligand	Heme Iron Metal-binding
Technical term	Complete proteome
Gene Ontology (GO)
Biological_process	photosynthetic electron transport chain Inferred from electronic annotation. Source: InterPro
Cellular_component	integral to membrane Inferred from electronic annotation. Source: UniProtKB-KW photosystem II reaction center Inferred from electronic annotation. Source: InterPro plasma membrane-derived thylakoid photosystem II Inferred from electronic annotation. Source: InterPro thylakoid membrane Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular_function	electron carrier activity Inferred from electronic annotation. Source: HAMAP heme binding Inferred from electronic annotation. Source: InterPro iron ion binding Inferred from electronic annotation. Source: HAMAP
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 83	83	Cytochrome b559 subunit alpha HAMAP-Rule MF_00642		PRO_0000233223
Regions
	Topological domain	1 – 19	19	Stromal Potential
	Transmembrane	20 – 40	21	Helical; Potential
	Topological domain	41 – 83	43	Lumenal Potential
Sites
	Metal binding	24	1	Iron (heme axial ligand); shared with beta subunit By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q5N556 [UniParc]. Last modified February 1, 2005. Version 1. Checksum: D28BF2DC5DC6A6BD	FASTA	83	9,334
	10 20 30 40 50 60 MAGGSTGERP FTDIITSIRY WVIHSITIPA LFIAGWLFVS TGLAYDAFGT PRPNEYFTQD 70 80 RTEVPIVSDR YSAKQQVDRF SAK

References

[1]

"Complete nucleotide sequence of the freshwater unicellular cyanobacterium Synechococcus elongatus PCC 6301 chromosome: gene content and organization." Sugita C., Ogata K., Shikata M., Jikuya H., Takano J., Furumichi M., Kanehisa M., Omata T., Sugiura M., Sugita M. Photosyn. Res. 93:55-67(2007) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 27144 / PCC 6301 / SAUG 1402/1.

Cross-references

Sequence databases
EMBL GenBank DDBJ	AP008231 Genomic DNA. Translation: BAD78563.1.
RefSeq	YP_171083.1. NC_006576.1.
3D structure databases
ProteinModelPortal	Q5N556.
SMR	Q5N556. Positions 4-80.
ModBase	Search...
Protein-protein interaction databases
STRING	269084.syc0373_d.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
EnsemblBacteria	BAD78563; BAD78563; syc0373_d.
GeneID	3199925.
KEGG	syc:syc0373_d.
PATRIC	32486314. VBISynElo117686_0433.
Organism-specific databases
CMR	Search...
Phylogenomic databases
eggNOG	NOG07088.
HOGENOM	HOG000254797.
KO	K02707.
OMA	TPRPNEY.
ProtClustDB	PRK02557.
Enzyme and pathway databases
BioCyc	SELO269084:GCDQ-380-MONOMER.
Family and domain databases
HAMAP	MF_00642. PSII_PsbE.
InterPro	IPR006217. PSII_cyt_b559_asu. IPR006216. PSII_cyt_b559_CS. IPR013081. PSII_cyt_b559_N. IPR013082. PSII_cytb559_asu_lum. [Graphical view]
Pfam	PF00283. Cytochrom_B559. 1 hit. PF00284. Cytochrom_B559a. 1 hit. [Graphical view]
PIRSF	PIRSF000036. PsbE. 1 hit.
TIGRFAMs	TIGR01332. cyt_b559_alpha. 1 hit.
PROSITE	PS00537. CYTOCHROME_B559. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

PSBE_SYNP6

Accession

Primary (citable) accession number: Q5N556

Entry history

Integrated into UniProtKB/Swiss-Prot:	May 2, 2006
Last sequence update:	February 1, 2005
Last modified:	May 29, 2013
This is version 65 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program