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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: 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

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

Complete GO annotation...

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

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.

Structurei

3D structure databases

ProteinModelPortaliP74714.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

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

Sequence similaritiesi

Contains 1 Rieske domain.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

HOGENOMiHOG000255192.
InParanoidiP74714.
KOiK02636.
OMAiKLAITIT.
PhylomeDBiP74714.

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.
IPR006311. TAT_signal.
[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.
PS51318. TAT. 1 hit.
[Graphical view]

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.
PATRICi23843898. VBISynSp132158_3479.

Cross-referencesi

Sequence databases

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

3D structure databases

ProteinModelPortaliP74714.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

IntActiP74714. 1 interactor.

Protein family/group databases

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

Proteomic databases

PRIDEiP74714.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiBAA18833; BAA18833; BAA18833.
KEGGisyn:slr1185.
PATRICi23843898. VBISynSp132158_3479.

Phylogenomic databases

HOGENOMiHOG000255192.
InParanoidiP74714.
KOiK02636.
OMAiKLAITIT.
PhylomeDBiP74714.

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.
IPR006311. TAT_signal.
[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.
PS51318. TAT. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiUCRIA_SYNY3
AccessioniPrimary (citable) accession number: P74714
Entry historyi
Integrated into UniProtKB/Swiss-Prot: June 21, 2005
Last sequence update: February 1, 1997
Last modified: November 2, 2016
This is version 121 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
  2. Synechocystis PCC 6803
    Synechocystis (strain PCC 6803): entries and gene names

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.