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B8HNR1 (UCRI_CYAP4) Reviewed, UniProtKB/Swiss-Prot

Last modified April 16, 2014. Version 40. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (1) | Third-party data text xml rdf/xml gff fasta
to top of pageNames·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order

Names and origin

Protein namesRecommended name:
Cytochrome b6-f complex iron-sulfur subunit

EC=1.10.9.1
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:Cyan7425_1419
OrganismCyanothece sp. (strain PCC 7425 / ATCC 29141) [Complete proteome] [HAMAP]
Taxonomic identifier395961 [NCBI]
Taxonomic lineageBacteriaCyanobacteriaOscillatoriophycideaeChroococcalesCyanothece

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-Rule MF_01335

Catalytic activity

Plastoquinol + 2 oxidized plastocyanin + 2 H+(Side 1) = plastoquinone + 2 reduced plastocyanin + 2 H+(Side 2). HAMAP-Rule MF_01335

Cofactor

Binds 1 2Fe-2S cluster per subunit By similarity. HAMAP-Rule 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-Rule MF_01335

Miscellaneous

The Rieske iron-sulfur protein is a high potential 2Fe-2S protein.

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-Rule MF_01335
PRO_1000166187

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
B8HNR1 [UniParc].

Last modified March 3, 2009. Version 1.
Checksum: CEB4DCD0AFFCD158

FASTA17919,106
        10         20         30         40         50         60 
MAQLSGTPDV PDMGRRQFMN LLTFGSATGV ALGMLYPVVR YFIPPASGGV GGGVVAKDAL 

        70         80         90        100        110        120 
GNDISVSDFL AKHPANDRAL AQGLKGDPTY IVVQDDHTIG DYGLNAVCTH LGCVVPWNIS 

       130        140        150        160        170 
ENKFICPCHG SQYDNTGKVV RGPAPLSLAL AHAAVSDDKI TFTPWTETDF RTGKEPWWT 

« Hide

References

[1]"Novel metabolic attributes of the genus Cyanothece, comprising a group of unicellular nitrogen-fixing Cyanobacteria."
Bandyopadhyay A., Elvitigala T., Welsh E., Stockel J., Liberton M., Min H., Sherman L.A., Pakrasi H.B.
MBio 2:E214-E214(2011) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: PCC 7425 / ATCC 29141.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
CP001344 Genomic DNA. Translation: ACL43792.1.
RefSeqYP_002482153.1. NC_011884.1.

3D structure databases

ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING395961.Cyan7425_1419.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaACL43792; ACL43792; Cyan7425_1419.
GeneID7287340.
KEGGcyn:Cyan7425_1419.
PATRIC21563779. VBICyaSp30657_1412.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0723.
HOGENOMHOG000255192.
KOK02636.
OMAGDPTYIV.
OrthoDBEOG6S52N7.
ProtClustDBPRK13474.

Enzyme and pathway databases

BioCycCSP395961:GJDE-1236-MONOMER.

Family and domain databases

Gene3D2.102.10.10. 1 hit.
HAMAPMF_01335. Cytb6_f_Rieske.
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]
PANTHERPTHR10134. PTHR10134. 1 hit.
PfamPF08802. CytB6-F_Fe-S. 1 hit.
PF00355. Rieske. 1 hit.
[Graphical view]
PRINTSPR00162. RIESKE.
SUPFAMSSF50022. SSF50022. 1 hit.
PROSITEPS51296. RIESKE. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry nameUCRI_CYAP4
AccessionPrimary (citable) accession number: B8HNR1
Entry history
Integrated into UniProtKB/Swiss-Prot: July 28, 2009
Last sequence update: March 3, 2009
Last modified: April 16, 2014
This is version 40 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