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Protein

Cytochrome b6-f complex iron-sulfur subunit 1

Gene

petC1

Organism
Synechocystis sp. (strain PCC 6803 / Kazusa)
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

Protein family/group databases

TCDBi3.D.3.5.1 the proton-translocating quinol:cytochrome c reductase (qcr) superfamily

Names & Taxonomyi

Protein namesi
Recommended name:
Cytochrome b6-f complex iron-sulfur subunit 1UniRule annotation (EC:1.10.9.1UniRule annotation)
Alternative name(s):
Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein 1UniRule annotation
Short name:
ISP 1UniRule annotation
Short name:
RISP 1UniRule annotation
Rieske iron-sulfur protein 1UniRule annotation
Gene namesi
Name:petC1UniRule annotation
Ordered Locus Names:slr1185
OrganismiSynechocystis sp. (strain PCC 6803 / Kazusa)
Taxonomic identifieri1111708 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesMerismopediaceaeSynechocystis
Proteomesi
  • UP000001425 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
Transmembranei17 – 36HelicalUniRule annotationAdd BLAST20

GO - Cellular componenti

Keywords - Cellular componenti

Membrane, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001277841 – 178Cytochrome b6-f complex iron-sulfur subunit 1Add BLAST178

Amino acid modifications

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

Keywords - PTMi

Disulfide bond

Proteomic databases

PaxDbiP74714
PRIDEiP74714

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

IntActiP74714, 1 interactor
STRINGi1148.SYNGTS_3127

Structurei

3D structure databases

ProteinModelPortaliP74714
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini61 – 161RieskeUniRule annotationAdd BLAST101

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

HOGENOMiHOG000255192
InParanoidiP74714
KOiK02636
OMAiFRNGNEY
PhylomeDBiP74714

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.

P74714-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MDNTQAIAPP SYSRRQLLNF LAGTTVAVTA SAGAYAMGKF FVPPAEKGGA
60 70 80 90 100
GGGIIAKDVL GNPIPASQIL AEAPGTRALV AGLAGDPTYL IVKEDGSLDS
110 120 130 140 150
IGIVDSCTHL GCTFPWNGND QEFQCPCHGS RYHPDGSVAR GPAPLPLKIV
160 170
QVAVVDDQIF ISPWTDLDPR TGEKPWWV
Length:178
Mass (Da):18,685
Last modified:February 1, 1997 - v1
Checksum:i6AFF9F4195A61956
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000022 Genomic DNA Translation: BAA18833.1
PIRiS76921

Genome annotation databases

EnsemblBacteriaiBAA18833; BAA18833; BAA18833
KEGGisyn:slr1185

Similar proteinsi

Entry informationi

Entry nameiUCRIA_SYNY3
AccessioniPrimary (citable) accession number: P74714
Entry historyiIntegrated into UniProtKB/Swiss-Prot: June 21, 2005
Last sequence update: February 1, 1997
Last modified: March 28, 2018
This is version 130 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
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health