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Q5N5B0 (UCRI_SYNP6) Reviewed, UniProtKB/Swiss-Prot

Last modified January 25, 2012. Version 59. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (1) | Third-party data text xml rdf/xml gff fasta
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Names and origin

Protein namesRecommended name:
Cytochrome b6-f complex iron-sulfur subunit
EC=1.10.99.1
Alternative name(s):
Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein
Short name=ISP
Short name=RISP
Rieske iron-sulfur protein
Gene names
Name:petC
Ordered Locus Names:syc0318_d
OrganismSynechococcus sp. (strain ATCC 27144 / PCC 6301 / SAUG 1402/1) (Anacystis nidulans) [Complete proteome] [HAMAP]
Taxonomic identifier269084 [NCBI]
Taxonomic lineageBacteria › Cyanobacteria › Chroococcales › Synechococcus

Protein attributes

Sequence length179 AA.
Sequence statusComplete.
Protein existenceInferred from homology

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.

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.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 179179Cytochrome b6-f complex iron-sulfur subunit HAMAP MF_01335
PRO_0000127782

Regions

Transmembrane21 – 4323Helical; Potential
Domain61 – 162102Rieske

Sites

Metal binding1081Iron-sulfur (2Fe-2S) By similarity
Metal binding1101Iron-sulfur (2Fe-2S); via pros nitrogen By similarity
Metal binding1261Iron-sulfur (2Fe-2S) By similarity
Metal binding1291Iron-sulfur (2Fe-2S); via pros nitrogen By similarity

Amino acid modifications

Disulfide bond113 ↔ 128 By similarity

Sequences

Sequence LengthMass (Da)Tools
Q5N5B0 [UniParc].

Last modified February 1, 2005. Version 1.
Checksum: EC139A4D25CAA047

FASTA17918,834
        10         20         30         40         50         60 
MTQVSGASDV PSMGRRQFMN LLTFGSVTGV ALGALYPVVN YFIPPSSGGS GGGVAAKDAL 

        70         80         90        100        110        120 
GNDVVLSKFL ADHNVGDRTL VQGLKGDPTY LVVESSEAIG DYGINAVCTH LGCVVPWNAS 

       130        140        150        160        170 
ENKFKCPCHG SQYDATGKVV RGPAPLSLAL AHVSVTDDKV FLSPWTETDF RTGDNPWWA

« Hide

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: 17211581] [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: BAD78508.1.
RefSeqYP_171028.1. NC_006576.1.

3D structure databases

ProteinModelPortalQ5N5B0.
SMRQ5N5B0. Positions 9-178.
ModBaseSearch...

Protein-protein interaction databases

STRINGQ5N5B0.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

GeneID3199358.
GenomeReviewsGene locus syc0318_d in contig AP008231_GR.
KEGGsyc:syc0318_d.
PATRIC32486194. VBISynElo117686_0374.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0723.
HOGENOMHBG668715.
OMAYPVANYF.
PhylomeDBQ5N5B0.
ProtClustDBPRK13474.

Enzyme and pathway databases

BioCycSELO269084:SYC0318_D-MONOMER.

Family and domain databases

HAMAPMF_01335. Cytb6_f_Rieske.
[Tree]
InterProIPR014909. Cyt_b6-f_cplx_Fe-S_su.
IPR023960. Cyt_b6_f_Rieske.
IPR017941. Rieske_2Fe-2S.
IPR014349. Rieske_Fe-S_prot.
IPR005805. Rieske_Fe-S_prot_C.
[Graphical view]
Gene3DG3DSA:2.102.10.10. Rieske_reg. 1 hit.
KOK02636.
PANTHERPTHR10134. Rieske. 1 hit.
PfamPF08802. CytB6-F_Fe-S. 1 hit.
PF00355. Rieske. 1 hit.
[Graphical view]
PRINTSPR00162. RIESKE.
SUPFAMSSF50022. Rieske_dom. 1 hit.
PROSITEPS51296. RIESKE. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry nameUCRI_SYNP6
AccessionPrimary (citable) accession number: Q5N5B0
Entry history
Integrated into UniProtKB/Swiss-Prot: July 5, 2005
Last sequence update: February 1, 2005
Last modified: January 25, 2012
This is version 59 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families

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