Cytochrome b6-f complex iron-sulfur subunit - Synechococcus sp. (strain ATCC 27264 / PCC 7002 / PR-6)

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Reviewed, UniProtKB/Swiss-Prot P26292 (UCRI_SYNP2)

Last modified January 19, 2010. Version 68. History...

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Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents

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Names and origin

Protein names

Recommended name:
    Cytochrome b6-f complex iron-sulfur subunit
    EC=1.10.99.1
Alternative name(s):
    Rieske iron-sulfur protein
    Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein
      Short name=ISP
      Short name=RISP

Gene names

Name:	petC
Ordered Locus Names:	SYNPCC7002_A1909

Organism

Synechococcus sp. (strain ATCC 27264 / PCC 7002 / PR-6) (Agmenellum quadruplicatum) [Complete proteome] [HAMAP]

Taxonomic identifier

32049 [NCBI]

Taxonomic lineage

Bacteria › Cyanobacteria › Chroococcales › Synechococcus

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Protein attributes

Sequence length	180 AA.
Sequence status	Complete.
Protein existence	Inferred from homology.

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General annotation (Comments)

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. HAMAP MF_01335
Catalytic activity	Plastoquinol-1 + 2 oxidized plastocyanin = plastoquinone + 2 reduced plastocyanin. HAMAP MF_01335
Cofactor	Binds 1 2Fe-2S cluster per subunit By similarity. HAMAP MF_01335
Subunit structure	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. HAMAP MF_01335
Subcellular location	Cellular thylakoid membrane; Single-pass membrane protein By similarity. Note: The transmembrane helix obliquely spans the membrane in one monomer, and its extrinsic C-terminal domain is part of the other monomer By similarity. HAMAP MF_01335
Miscellaneous	The Rieske iron-sulfur protein is a high potential 2Fe-2S protein. HAMAP MF_01335
Sequence similarities	Contains 1 Rieske domain.

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Ontologies

Keywords
Biological process	Electron transport Transport
Cellular component	Membrane Thylakoid
Domain	Transmembrane
Ligand	2Fe-2S Iron Iron-sulfur Metal-binding
Molecular function	Oxidoreductase
PTM	Disulfide bond
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	electron transport chain Inferred from electronic annotation. Source: UniProtKB-KW photosynthesis Inferred from electronic annotation. Source: HAMAP transport Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	integral to membrane Inferred from electronic annotation. Source: UniProtKB-SubCell thylakoid membrane Inferred from electronic annotation. Source: InterPro
Molecular function	2 iron, 2 sulfur cluster binding Inferred from electronic annotation. Source: UniProtKB-KW electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity Inferred from electronic annotation. Source: HAMAP iron ion binding Inferred from electronic annotation. Source: UniProtKB-KW plastoquinol-plastocyanin reductase activity Inferred from electronic annotation. Source: HAMAP ubiquinol-cytochrome-c reductase activity Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

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Sequence annotation (Features)

Feature key

Position(s)

Length

Description

Graphical view

Feature identifier

Molecule processing

Chain

1 – 180

180

Cytochrome b6-f complex iron-sulfur subunit HAMAP MF_01335

PRO_0000127781

Regions

Transmembrane

21 – 43

Potential

Domain

70 – 162

Rieske

Sites

Metal binding

108

Iron-sulfur (2Fe-2S) By similarity

Metal binding

110

Iron-sulfur (2Fe-2S); via pros nitrogen By similarity

Metal binding

126

Iron-sulfur (2Fe-2S) By similarity

Metal binding

129

Iron-sulfur (2Fe-2S); via pros nitrogen By similarity

Amino acid modifications

Disulfide bond

113 ↔ 128

By similarity

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Sequences

Sequence

Length

Mass (Da)

Tools

P26292-1 [UniParc].

Last modified May 1, 1992. Version 1.
Checksum: 7A8185C310B47917
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FASTA

180

19,178

        10         20         30         40         50         60 
MTQLSGSSDV PDLGRRQFLN LLWVGTAAGT ALGGLYPVIK YFIPPSSGGA GGGVIAKDAL 

        70         80         90        100        110        120 
GNDIIVSDYL QTHTAGDRSL AQGLKGDPTY VVVEGDNTIS SYGINAICTH LGCVVPWNTA 

       130        140        150        160        170        180 
ENKFMCPCHG SQYDETGKVV RGPAPLSLAL VHAEVTEDDK ISFTDWTETD FRTDEAPWWA

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References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Cloning and sequencing of the petBD operon from the cyanobacterium Synechococcus sp. PCC 7002." Brand S.N., Tan X., Widger W.R. Plant Mol. Biol. 20:481-491(1992) [PubMed: 1421151] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[2]	"Complete sequence of Synechococcus sp. PCC 7002." Li T., Zhao J., Zhao C., Liu Z., Zhao F., Marquardt J., Nomura C.T., Persson S., Detter J.C., Richardson P.M., Lanz C., Schuster S.C., Wang J., Li S., Huang X., Cai T., Yu Z., Luo J., Zhao J., Bryant D.A. Submitted (FEB-2008) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

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Cross-references

Sequence databases
EMBL GenBank DDBJ	M74514 Genomic DNA. Translation: AAA22069.1. CP000951 Genomic DNA. Translation: ACA99896.1.
RefSeq	YP_001735152.1.
3D structure databases
SMR	P26292. Positions 9-179.
ModBase	Search...
Genome annotation databases
GeneID	6057819.
GenomeReviews	Gene locus SYNPCC7002_A1909 in contig CP000951_GR.
KEGG	syp:SYNPCC7002_A1909.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	HBG668715.
OMA	YPVANYF.
Family and domain databases
HAMAP	MF_01335. Cytb6_f_Rieske. [Tree]
InterPro	IPR014909. Cyt_b6-f_cplx_Fe-S_su. IPR017941. Rieske_2Fe-2S. IPR014349. Rieske_Fe-S_prot. IPR005805. Rieske_Fe-S_prot_C. [Graphical view]
Gene3D	G3DSA:2.102.10.10. Rieske_reg. 1 hit.
PANTHER	PTHR10134. Rieske. 1 hit.
Pfam	PF08802. CytB6-F_Fe-S. 1 hit. PF00355. Rieske. 1 hit. [Graphical view]
PRINTS	PR00162. RIESKE.
PROSITE	PS51296. RIESKE. 1 hit. [Graphical view]
ProtoNet	Search...

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Entry information

Entry name

UCRI_SYNP2

Accession

Primary (citable) accession number: P26292
Secondary accession number(s): B1XQK1

Entry history

Integrated into UniProtKB/Swiss-Prot:	May 1, 1992
Last sequence update:	May 1, 1992
Last modified:	January 19, 2010
This is version 68 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)

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Relevant documents

SIMILARITY comments

Index of protein domains and families

Names and origin

Protein attributes

General annotation (Comments)

Ontologies

Sequence annotation (Features)

Molecule processing

Regions

Sites

Amino acid modifications

Sequences

References

Cross-references

Sequence databases

3D structure databases

Genome annotation databases

Organism-specific databases

Phylogenomic databases

Family and domain databases

Entry information

Relevant documents