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Protein

Ubiquinol-cytochrome c reductase iron-sulfur subunit

Gene

petA

Organism
Blastochloris viridis (Rhodopseudomonas viridis)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Protein inferred from homologyi

Functioni

Component of the ubiquinol-cytochrome c reductase complex (complex III or cytochrome b-c1 complex), which is a respiratory chain that generates an electrochemical potential coupled to ATP synthesis.

Miscellaneous

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

Catalytic activityi

Quinol + 2 ferricytochrome c = quinone + 2 ferrocytochrome c + 2 H+.

Cofactori

[2Fe-2S] clusterPROSITE-ProRule annotationNote: Binds 1 [2Fe-2S] cluster per subunit.PROSITE-ProRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi118Iron-sulfur (2Fe-2S)PROSITE-ProRule annotation1
Metal bindingi120Iron-sulfur (2Fe-2S); via pros nitrogenPROSITE-ProRule annotation1
Metal bindingi137Iron-sulfur (2Fe-2S)PROSITE-ProRule annotation1
Metal bindingi140Iron-sulfur (2Fe-2S); via pros nitrogenPROSITE-ProRule annotation1

GO - Molecular functioni

Keywordsi

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

Names & Taxonomyi

Protein namesi
Recommended name:
Ubiquinol-cytochrome c reductase iron-sulfur subunit (EC:1.10.2.2)
Alternative name(s):
Rieske iron-sulfur protein
Short name:
RISP
Gene namesi
Name:petA
Synonyms:fbcF
OrganismiBlastochloris viridis (Rhodopseudomonas viridis)
Taxonomic identifieri1079 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaAlphaproteobacteriaRhizobialesHyphomicrobiaceaeBlastochloris

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transmembranei14 – 35HelicalSequence analysisAdd BLAST22

GO - Cellular componenti

Keywords - Cellular componenti

Cell membrane, Membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001277651 – 179Ubiquinol-cytochrome c reductase iron-sulfur subunitAdd BLAST179

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Disulfide bondi123 ↔ 139PROSITE-ProRule annotation

Keywords - PTMi

Disulfide bond

Interactioni

Subunit structurei

The main subunits of complex b-c1 are: cytochrome b, cytochrome c1 and the Rieske protein.

Structurei

3D structure databases

ProteinModelPortaliP81380.
SMRiP81380.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini80 – 173RieskePROSITE-ProRule annotationAdd BLAST94

Keywords - Domaini

Transmembrane, Transmembrane helix

Family and domain databases

Gene3Di2.102.10.10. 1 hit.
InterProiView protein in InterPro
IPR017941. Rieske_2Fe-2S.
IPR014349. Rieske_Fe-S_prot.
IPR005805. Rieske_Fe-S_prot_C.
IPR006311. TAT_signal.
IPR019546. TAT_signal_bac_arc.
IPR019470. Ubiq_cytC_Rdtase_Fe-S_su_TAT.
IPR006317. Ubiquinol_cyt_c_Rdtase_Fe-S-su.
PANTHERiPTHR10134. PTHR10134. 1 hit.
PfamiView protein in Pfam
PF00355. Rieske. 1 hit.
PF10399. UCR_Fe-S_N. 1 hit.
PRINTSiPR00162. RIESKE.
SUPFAMiSSF50022. SSF50022. 1 hit.
TIGRFAMsiTIGR01416. Rieske_proteo. 1 hit.
TIGR01409. TAT_signal_seq. 1 hit.
PROSITEiView protein in PROSITE
PS51296. RIESKE. 1 hit.
PS51318. TAT. 1 hit.

Sequencei

Sequence statusi: Complete.

P81380-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MASSDTAEAT RRDFLYVATA AVGAAGVAAV AWPFITQMNP DAATIAAGAP
60 70 80 90 100
IDIDISPVTE GQIVRVFWRG KPIFIRHRTA KEIQSEEAAD VGALIDPQPD
110 120 130 140 150
SARVKPGKAE WLVVYASCTH LGCIPLGHQG DWGGWFCPCH GSQYDASGRV
160 170
RKGPAPTNLP VPPYEFVDNT KIRIGAGVA
Length:179
Mass (Da):19,011
Last modified:July 15, 1999 - v2
Checksum:iFEE328E1637DC49C
GO

Sequence databases

PIRiJQ0345.

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.

Entry informationi

Entry nameiUCRI_BLAVI
AccessioniPrimary (citable) accession number: P81380
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 15, 1999
Last sequence update: July 15, 1999
Last modified: February 15, 2017
This is version 89 of the entry and version 2 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program