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Protein

Cytochrome f

Gene

petA

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.By similarity

Cofactori

hemeBy similarityNote: Binds 1 heme group covalently.By similarity

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi45 – 451Iron (heme axial ligand); via amino nitrogenBy similarity
Binding sitei66 – 661Heme (covalent)By similarity
Binding sitei69 – 691Heme (covalent)By similarity
Metal bindingi70 – 701Iron (heme axial ligand)By similarity

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Biological processi

Electron transport, Photosynthesis, Transport

Keywords - Ligandi

Heme, Iron, 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 f
Gene namesi
Name:petA
Ordered Locus Names:sll1317
OrganismiSynechocystis sp. (strain PCC 6803 / Kazusa)
Taxonomic identifieri1111708 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaOscillatoriophycideaeChroococcalesSynechocystis
Proteomesi
  • UP000001425 Componenti: Chromosome

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei296 – 31318HelicalSequence analysisAdd
BLAST

GO - Cellular componenti

  • cytochrome b6f complex Source: UniProtKB
  • integral component of thylakoid membrane Source: InterPro
Complete GO annotation...

Keywords - Cellular componenti

Membrane, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Signal peptidei1 – 4444By similarityAdd
BLAST
Chaini45 – 328284Cytochrome fPRO_0000023848Add
BLAST

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 (By similarity).By similarity

Protein-protein interaction databases

IntActiP26287. 10 interactions.

Structurei

3D structure databases

ProteinModelPortaliP26287.
SMRiP26287. Positions 45-327.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the cytochrome f family.Curated

Keywords - Domaini

Signal, Transmembrane, Transmembrane helix

Phylogenomic databases

HOGENOMiHOG000024481.
InParanoidiP26287.
KOiK02634.
OMAiHVGGNRG.

Family and domain databases

Gene3Di1.20.5.700. 1 hit.
2.60.40.830. 2 hits.
HAMAPiMF_00610. Cytb6_f_cytF. 1 hit.
InterProiIPR024058. Cyt-f_TM.
IPR002325. Cyt_f.
IPR024094. Cyt_f_lg_dom.
IPR011054. Rudment_hybrid_motif.
[Graphical view]
PfamiPF01333. Apocytochr_F_C. 1 hit.
PF16639. Apocytochr_F_N. 1 hit.
[Graphical view]
PRINTSiPR00610. CYTOCHROMEF.
SUPFAMiSSF103431. SSF103431. 1 hit.
SSF49441. SSF49441. 2 hits.
SSF51246. SSF51246. 1 hit.
PROSITEiPS51010. CYTF. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

P26287-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MRNPDTLGLW TKTMVALRRF TVLAIATVSV FLITDLGLPQ AASAYPFWAQ
60 70 80 90 100
ETAPLTPREA TGRIVCANCH LAQKAAEVEI PQAVLPDTVF EAVVKIPYDL
110 120 130 140 150
DSQQVLGDGS KGGLNVGAVL MLPEGFKIAP PDRLSEGLKE KVGGTYFQPY
160 170 180 190 200
REDMENVVIV GPLPGEQYQE IVFPVLSPDP AKDKSINYGK FAVHLGANRG
210 220 230 240 250
RGQIYPTGLL SNNNAFKAPN AGTISEVNAL EAGGYQLILT TADGTETVDI
260 270 280 290 300
PAGPELIVSA GQTVEAGEFL TNNPNVGGFG QKDTEVVLQN PTRIKFLVLF
310 320
LAGIMLSQIL LVLKKKQIEK VQAAELNF
Length:328
Mass (Da):35,231
Last modified:May 1, 1992 - v1
Checksum:i6ABBEE56697D86AB
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X58532 Genomic DNA. Translation: CAA41423.1.
BA000022 Genomic DNA. Translation: BAA17627.1.
PIRiS16573.

Genome annotation databases

EnsemblBacteriaiBAA17627; BAA17627; BAA17627.
KEGGisyn:sll1317.
PATRICi23839168. VBISynSp132158_1148.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X58532 Genomic DNA. Translation: CAA41423.1.
BA000022 Genomic DNA. Translation: BAA17627.1.
PIRiS16573.

3D structure databases

ProteinModelPortaliP26287.
SMRiP26287. Positions 45-327.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

IntActiP26287. 10 interactions.

Protein family/group databases

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

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiBAA17627; BAA17627; BAA17627.
KEGGisyn:sll1317.
PATRICi23839168. VBISynSp132158_1148.

Phylogenomic databases

HOGENOMiHOG000024481.
InParanoidiP26287.
KOiK02634.
OMAiHVGGNRG.

Family and domain databases

Gene3Di1.20.5.700. 1 hit.
2.60.40.830. 2 hits.
HAMAPiMF_00610. Cytb6_f_cytF. 1 hit.
InterProiIPR024058. Cyt-f_TM.
IPR002325. Cyt_f.
IPR024094. Cyt_f_lg_dom.
IPR011054. Rudment_hybrid_motif.
[Graphical view]
PfamiPF01333. Apocytochr_F_C. 1 hit.
PF16639. Apocytochr_F_N. 1 hit.
[Graphical view]
PRINTSiPR00610. CYTOCHROMEF.
SUPFAMiSSF103431. SSF103431. 1 hit.
SSF49441. SSF49441. 2 hits.
SSF51246. SSF51246. 1 hit.
PROSITEiPS51010. CYTF. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiCYF_SYNY3
AccessioniPrimary (citable) accession number: P26287
Entry historyi
Integrated into UniProtKB/Swiss-Prot: May 1, 1992
Last sequence update: May 1, 1992
Last modified: September 7, 2016
This is version 115 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

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.