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Protein

Cytochrome b6-f complex iron-sulfur subunit

Gene

petC

Organism
Prochlorococcus marinus (strain MIT 9301)
Status
Reviewed-Annotation score: -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

Miscellaneous

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

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

Keywordsi

Molecular functionOxidoreductase
Biological processElectron transport, Transport
Ligand2Fe-2S, Iron, Iron-sulfur, Metal-binding

Enzyme and pathway databases

BioCyciPMAR167546:G1G8B-478-MONOMER

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:P9301_04871
OrganismiProchlorococcus marinus (strain MIT 9301)
Taxonomic identifieri167546 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesProchloraceaeProchlorococcus
Proteomesi
  • UP000001430 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

Keywords - Cellular componenti

Membrane, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00002984561 – 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

STRINGi167546.P9301_04871

Structurei

3D structure databases

ProteinModelPortaliA3PBI5
SMRiA3PBI5
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

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

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG4105DQV Bacteria
COG0723 LUCA
HOGENOMiHOG000255192
KOiK02636
OMAiPWTETDF
OrthoDBiPOG091H05QX

Family and domain databases

Gene3Di2.102.10.10, 1 hit
HAMAPiMF_01335 Cytb6_f_Rieske, 1 hit
InterProiView protein in InterPro
IPR014909 Cyt_b6-f_cplx_Fe-S_su
IPR023960 Cyt_b6_f_Rieske
IPR017941 Rieske_2Fe-2S
IPR036922 Rieske_2Fe-2S_sf
IPR014349 Rieske_Fe-S_prot
IPR005805 Rieske_Fe-S_prot_C
IPR006311 TAT_signal
PANTHERiPTHR10134 PTHR10134, 1 hit
PTHR10134:SF5 PTHR10134:SF5, 1 hit
PfamiView protein in Pfam
PF08802 CytB6-F_Fe-S, 1 hit
PF00355 Rieske, 1 hit
PRINTSiPR00162 RIESKE
SUPFAMiSSF50022 SSF50022, 1 hit
PROSITEiView protein in PROSITE
PS51296 RIESKE, 1 hit
PS51318 TAT, 1 hit

Sequencei

Sequence statusi: Complete.

A3PBI5-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MTQLSSNDVP SMGRRQFMNL LTFGTATGVA LGALYPVANY FMPLRAGGGG
60 70 80 90 100
GGTSAKDELG NPITKTGWLA THQAGDRSLV QGLKGDPTYL IVNEVGEIGE
110 120 130 140 150
FGLNAICTHL GCVVPWDSGA NKFICPCHGS QYDTNGKVVR GPAPLSLALA
160 170
HVDIEDDAVL VKQWSETDFR TNENPWWA
Length:178
Mass (Da):18,980
Last modified:April 3, 2007 - v1
Checksum:iDDFEF528EA2CF28A
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000576 Genomic DNA Translation: ABO17110.1
RefSeqiWP_011862485.1, NC_009091.1

Genome annotation databases

EnsemblBacteriaiABO17110; ABO17110; P9301_04871
GeneIDi4912628
KEGGipmg:P9301_04871

Similar proteinsi

Entry informationi

Entry nameiUCRI_PROM0
AccessioniPrimary (citable) accession number: A3PBI5
Entry historyiIntegrated into UniProtKB/Swiss-Prot: August 21, 2007
Last sequence update: April 3, 2007
Last modified: March 28, 2018
This is version 87 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

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