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Q93SX0 (UCRIA_NOSS1) Reviewed, UniProtKB/Swiss-Prot

Last modified May 1, 2013. Version 83. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (2) | Third-party data text xml rdf/xml gff fasta
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Names and origin

Protein namesRecommended name:
Cytochrome b6-f complex iron-sulfur subunit 1
EC=1.10.9.1
Alternative name(s):
Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein 1
Short name=ISP 1
Short name=RISP 1
Rieske iron-sulfur protein 1
Gene names
Name:petC1
Ordered Locus Names:all2453
OrganismNostoc sp. (strain PCC 7120 / UTEX 2576) [Complete proteome] [HAMAP]
Taxonomic identifier103690 [NCBI]
Taxonomic lineageBacteria › Cyanobacteria › Nostocales › Nostocaceae › Nostoc

Protein attributes

Sequence length179 AA.
Sequence statusComplete.
Protein existenceEvidence at protein level

General annotation (Comments)

Function

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. HAMAP-Rule MF_01335

Catalytic activity

Plastoquinol + 2 oxidized plastocyanin + 2 H+(Side 1) = plastoquinone + 2 reduced plastocyanin + 2 H+(Side 2). HAMAP-Rule MF_01335

Cofactor

Binds 1 2Fe-2S cluster per subunit By similarity.

Subunit structure

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.

Subcellular location

Cellular thylakoid membrane; Single-pass membrane protein By similarity. Note: The transmembrane helix obliquely spans the membrane in one monomer, and its extrinsic C-terminal domain is part of the other monomer By similarity. HAMAP-Rule MF_01335

Miscellaneous

The Rieske iron-sulfur protein is a high potential 2Fe-2S protein. HAMAP-Rule MF_01335

Sequence similarities

Contains 1 Rieske domain.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 179179Cytochrome b6-f complex iron-sulfur subunit 1 HAMAP-Rule MF_01335
PRO_0000127767

Regions

Transmembrane21 – 4323Helical; Potential
Domain61 – 162102Rieske

Sites

Metal binding1081Iron-sulfur (2Fe-2S) By similarity
Metal binding1101Iron-sulfur (2Fe-2S); via pros nitrogen By similarity
Metal binding1261Iron-sulfur (2Fe-2S) By similarity
Metal binding1291Iron-sulfur (2Fe-2S); via pros nitrogen By similarity

Amino acid modifications

Disulfide bond113 ↔ 128 By similarity

Secondary structure

1 .............................. 179
Helix Strand Turn

Details...

Sequences

Sequence LengthMass (Da)Tools
Q93SX0 [UniParc].

Last modified December 1, 2001. Version 1.
Checksum: 412E1D66967886E7

FASTA17919,198
        10         20         30         40         50         60 
MAQFSESVDV PDMGRRQFMN LLTFGTVTGV ALGALYPVVN YFIPPAAGGA GGGTTAKDEL 

        70         80         90        100        110        120 
GNDVSVSKFL ESHNVGDRTL VQGLKGDPTY IVVESKEAIT DYGINAVCTH LGCVVPWNAA 

       130        140        150        160        170 
ENKFKCPCHG SQYDATGKVV RGPAPKSLAL SHAKTENDKI VLTSWTETDF RTGEEPWWS

« Hide

References

« Hide 'large scale' references
[1]"b6f complex of Anabaena sp; possible function of alternative Rieske-FeS proteins."
Arnold M.
Submitted (MAY-2001) to the EMBL/GenBank/DDBJ databases
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[2]"Complete genomic sequence of the filamentous nitrogen-fixing cyanobacterium Anabaena sp. strain PCC 7120."
Kaneko T., Nakamura Y., Wolk C.P., Kuritz T., Sasamoto S., Watanabe A., Iriguchi M., Ishikawa A., Kawashima K., Kimura T., Kishida Y., Kohara M., Matsumoto M., Matsuno A., Muraki A., Nakazaki N., Shimpo S., Sugimoto M. expand/collapse author list , Takazawa M., Yamada M., Yasuda M., Tabata S.
DNA Res. 8:205-213(2001) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: PCC 7120 / UTEX 2576.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ		AJ319646 Genomic DNA. Translation: CAC39604.1.
BA000019 Genomic DNA. Translation: BAB74152.1.
PIRAF2112.
RefSeqNP_486493.1. NC_003272.1.

3D structure databases

PDBe
RCSB PDB
PDBj
EntryMethodResolution (Å)ChainPositionsPDBsum
2ZT9X-ray3.00D1-179[»]
4H44X-ray2.70D1-179[»]
ProteinModelPortalQ93SX0.
SMRQ93SX0. Positions 9-178.
ModBaseSearch...

Protein-protein interaction databases

STRING103690.all2453.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaBAB74152; BAB74152; BAB74152.
GeneID1106050.
KEGGana:all2453.
PATRIC22775100. VBINosSp37423_3016.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0723.
HOGENOMHOG000255192.
KOK02636.
OMAGDPTYIV.
ProtClustDBPRK13474.

Family and domain databases

Gene3D2.102.10.10. 1 hit.
HAMAPMF_01335. Cytb6_f_Rieske.
InterProIPR014909. 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]
PANTHERPTHR10134. PTHR10134. 1 hit.
PfamPF08802. CytB6-F_Fe-S. 1 hit.
PF00355. Rieske. 1 hit.
[Graphical view]
PRINTSPR00162. RIESKE.
SUPFAMSSF50022. Rieske_dom. 1 hit.
PROSITEPS51296. RIESKE. 1 hit.
[Graphical view]
ProtoNetSearch...

Other

EvolutionaryTraceQ93SX0.

Entry information

Entry nameUCRIA_NOSS1
AccessionPrimary (citable) accession number: Q93SX0
Entry history
Integrated into UniProtKB/Swiss-Prot: July 5, 2005
Last sequence update: December 1, 2001
Last modified: May 1, 2013
This is version 83 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

PDB cross-references

Index of Protein Data Bank (PDB) cross-references

SIMILARITY comments

Index of protein domains and families

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