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Protein

Cytochrome b6-f complex iron-sulfur subunit, chloroplastic

Gene

petC

Organism
Fritillaria agrestis (Stinkbells)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Experimental evidence at transcript leveli

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

Catalytic activityi

Plastoquinol + 2 oxidized plastocyanin + 2 H+(Side 1) = plastoquinone + 2 reduced plastocyanin + 4 H+(Side 2).

Cofactori

[2Fe-2S] clusterBy similarityNote: Binds 1 [2Fe-2S] cluster per subunit.By similarity

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi158 – 1581Iron-sulfur (2Fe-2S)By similarity
Metal bindingi160 – 1601Iron-sulfur (2Fe-2S); via pros nitrogenBy similarity
Metal bindingi176 – 1761Iron-sulfur (2Fe-2S)By similarity
Metal bindingi179 – 1791Iron-sulfur (2Fe-2S); via pros nitrogenBy similarity

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

Names & Taxonomyi

Protein namesi
Recommended name:
Cytochrome b6-f complex iron-sulfur subunit, chloroplastic (EC:1.10.9.1)
Alternative name(s):
Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein
Rieske iron-sulfur protein
Short name:
ISP
Short name:
RISP
Gene namesi
Name:petC
OrganismiFritillaria agrestis (Stinkbells)
Taxonomic identifieri64177 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaLiliopsidaLilialesLiliaceaeFritillaria

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei73 – 9321HelicalSequence analysisAdd
BLAST

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Chloroplast, Membrane, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transit peptidei1 – 5656ChloroplastSequence analysisAdd
BLAST
Chaini57 – 230174Cytochrome b6-f complex iron-sulfur subunit, chloroplasticPRO_0000030689Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Disulfide bondi163 ↔ 178By similarity

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 (By similarity).By similarity

Structurei

3D structure databases

ProteinModelPortaliO49078.
SMRiO49078. Positions 60-230.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Domaini116 – 21297RieskeAdd
BLAST

Sequence similaritiesi

Contains 1 Rieske domain.Curated

Keywords - Domaini

Transit peptide, Transmembrane, Transmembrane helix

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.
[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.
[Graphical view]

Sequencei

Sequence statusi: Complete.

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

O49078-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MASTTLSATP TPSQLSAAKN GAYSPSRALL GKTARGLYPE KEMVSRKVTC
60 70 80 90 100
QATSIPADRV PDMGKRQTMN LLLLGALSLP TAGMLIPYGA FFVPPSSGGG
110 120 130 140 150
GGGIVAKDAV GNDIVAAAWL KTHGPGDRTL AQGLRGDPTY LVVENDRSLA
160 170 180 190 200
TYGINAVCTH LGCVVPWNKA ENKFLCPCHG SQYNNQGKVV RGPAPLSLAL
210 220 230
SHCDISEEGK VVFVPWVETD FRTGENPWWS
Length:230
Mass (Da):24,298
Last modified:June 1, 1998 - v1
Checksum:iD1B914F0049AF51E
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF037456 mRNA. Translation: AAC04807.1.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF037456 mRNA. Translation: AAC04807.1.

3D structure databases

ProteinModelPortaliO49078.
SMRiO49078. Positions 60-230.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

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.
[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.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiUCRIA_FRIAG
AccessioniPrimary (citable) accession number: O49078
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 5, 2005
Last sequence update: June 1, 1998
Last modified: May 11, 2016
This is version 83 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Miscellaneous

This protein is 1 of 2 subunits of the cytochrome b6-f complex that are encoded in the nucleus.
The Rieske iron-sulfur protein is a high potential 2Fe-2S protein.

Documents

  1. SIMILARITY comments
    Index of protein domains and families

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.