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Protein

Cytochrome b6-f complex iron-sulfur subunit

Gene

petC

Organism
Synechococcus sp. (strain RCC307)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

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.UniRule annotation

Catalytic activityi

Plastoquinol + 2 oxidized plastocyanin + 2 H+(Side 1) = plastoquinone + 2 reduced plastocyanin + 4 H+(Side 2).UniRule annotation

Cofactori

[2Fe-2S] clusterUniRule annotationNote: Binds 1 [2Fe-2S] cluster per subunit.UniRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi107Iron-sulfur (2Fe-2S)UniRule annotation1
Metal bindingi109Iron-sulfur (2Fe-2S); via pros nitrogenUniRule annotation1
Metal bindingi125Iron-sulfur (2Fe-2S)UniRule annotation1
Metal bindingi128Iron-sulfur (2Fe-2S); via pros nitrogenUniRule annotation1

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Oxidoreductase

Keywords - Biological processi

Electron transport, Transport

Keywords - Ligandi

2Fe-2S, Iron, Iron-sulfur, Metal-binding

Names & Taxonomyi

Protein namesi
Recommended name:
Cytochrome b6-f complex iron-sulfur subunitUniRule annotation (EC:1.10.9.1UniRule annotation)
Alternative name(s):
Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur proteinUniRule annotation
Short name:
ISPUniRule annotation
Short name:
RISPUniRule annotation
Rieske iron-sulfur proteinUniRule annotation
Gene namesi
Name:petCUniRule annotation
Ordered Locus Names:SynRCC307_0704
OrganismiSynechococcus sp. (strain RCC307)
Taxonomic identifieri316278 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesSynechococcaceaeSynechococcus
Proteomesi
  • UP000001115 Componenti: Chromosome

Subcellular locationi

  • Cellular thylakoid membrane UniRule annotation; Single-pass membrane protein UniRule annotation

  • Note: The transmembrane helix obliquely spans the membrane in one monomer, and its extrinsic C-terminal domain is part of the other monomer.UniRule annotation

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transmembranei20 – 42HelicalUniRule annotationAdd BLAST23

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Membrane, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_10000529461 – 178Cytochrome b6-f complex iron-sulfur subunitAdd BLAST178

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Disulfide bondi112 ↔ 127UniRule annotation

Keywords - PTMi

Disulfide bond

Interactioni

Subunit structurei

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.UniRule annotation

Protein-protein interaction databases

STRINGi316278.SynRCC307_0704.

Structurei

3D structure databases

ProteinModelPortaliA5GRU8.
SMRiA5GRU8.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini65 – 161RieskeUniRule annotationAdd BLAST97

Sequence similaritiesi

Contains 1 Rieske domain.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG4105DQV. Bacteria.
COG0723. LUCA.
HOGENOMiHOG000255192.
KOiK02636.
OMAiKGDPTYI.
OrthoDBiPOG091H05QX.

Family and domain databases

Gene3Di2.102.10.10. 1 hit.
HAMAPiMF_01335. Cytb6_f_Rieske. 1 hit.
InterProiIPR014909. 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]
PANTHERiPTHR10134. PTHR10134. 1 hit.
PfamiPF08802. CytB6-F_Fe-S. 1 hit.
PF00355. Rieske. 1 hit.
[Graphical view]
PRINTSiPR00162. RIESKE.
SUPFAMiSSF50022. SSF50022. 1 hit.
PROSITEiPS51296. RIESKE. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

A5GRU8-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MTQISAKDVP GMGRRQFMNL LTFGSVTGVA LGALYPVVNY FIPPKASGAG
60 70 80 90 100
GGTTAKDELG NDVTASGWLA DHKEGDRSLV QGLKGDPTYL IVDGPDSIGD
110 120 130 140 150
YGINAICTHL GCVVPWNAGA NKFMCPCHGS QYDATGKVVR GPAPLSLALA
160 170
HVNVENDNVF VSQWSETDFR TDEKPWWA
Length:178
Mass (Da):18,929
Last modified:June 12, 2007 - v1
Checksum:iE6ADA0BC97F5FE85
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CT978603 Genomic DNA. Translation: CAK27607.1.
RefSeqiWP_011935122.1. NC_009482.1.

Genome annotation databases

EnsemblBacteriaiCAK27607; CAK27607; SynRCC307_0704.
KEGGisyr:SynRCC307_0704.
PATRICi23822274. VBISynSp108374_0695.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CT978603 Genomic DNA. Translation: CAK27607.1.
RefSeqiWP_011935122.1. NC_009482.1.

3D structure databases

ProteinModelPortaliA5GRU8.
SMRiA5GRU8.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi316278.SynRCC307_0704.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiCAK27607; CAK27607; SynRCC307_0704.
KEGGisyr:SynRCC307_0704.
PATRICi23822274. VBISynSp108374_0695.

Phylogenomic databases

eggNOGiENOG4105DQV. Bacteria.
COG0723. LUCA.
HOGENOMiHOG000255192.
KOiK02636.
OMAiKGDPTYI.
OrthoDBiPOG091H05QX.

Family and domain databases

Gene3Di2.102.10.10. 1 hit.
HAMAPiMF_01335. Cytb6_f_Rieske. 1 hit.
InterProiIPR014909. 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]
PANTHERiPTHR10134. PTHR10134. 1 hit.
PfamiPF08802. CytB6-F_Fe-S. 1 hit.
PF00355. Rieske. 1 hit.
[Graphical view]
PRINTSiPR00162. RIESKE.
SUPFAMiSSF50022. SSF50022. 1 hit.
PROSITEiPS51296. RIESKE. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiUCRI_SYNR3
AccessioniPrimary (citable) accession number: A5GRU8
Entry historyi
Integrated into UniProtKB/Swiss-Prot: January 15, 2008
Last sequence update: June 12, 2007
Last modified: November 2, 2016
This is version 75 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Miscellaneous

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

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.