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B2J3K2 (UCRI_NOSP7) Reviewed, UniProtKB/Swiss-Prot

Last modified January 25, 2012. Version 30. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (1) | 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
EC=1.10.99.1
Alternative name(s):
Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein
Short name=ISP
Short name=RISP
Rieske iron-sulfur protein
Gene names
Name:petC
Ordered Locus Names:Npun_R0132
OrganismNostoc punctiforme (strain ATCC 29133 / PCC 73102) [Complete proteome] [HAMAP]
Taxonomic identifier63737 [NCBI]
Taxonomic lineageBacteria › Cyanobacteria › Nostocales › Nostocaceae › Nostoc

Protein attributes

Sequence length179 AA.
Sequence statusComplete.
Protein existenceInferred from homology

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 MF_01335

Catalytic activity

Plastoquinol-1 + 2 oxidized plastocyanin = plastoquinone + 2 reduced plastocyanin. HAMAP MF_01335

Cofactor

Binds 1 2Fe-2S cluster per subunit By similarity. HAMAP MF_01335

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 MF_01335

Miscellaneous

The Rieske iron-sulfur protein is a high potential 2Fe-2S protein. HAMAP 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 HAMAP MF_01335
PRO_1000142568

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

Sequences

Sequence LengthMass (Da)Tools
B2J3K2 [UniParc].

Last modified June 10, 2008. Version 1.
Checksum: B2330E9352ABB9FC

FASTA17919,238
        10         20         30         40         50         60 
MAQFSESADV PDMGRRQFMN LLTFGTVTGV ALGALYPVVN YFIPPATGGA GGGTTAKDEL 

        70         80         90        100        110        120 
GNDVSVTKFL ENRNAGDRNL VQGLKGDPTY IVVDSKEAIK DYGINAICTH LGCVVPWNVA 

       130        140        150        160        170 
ENKFKCPCHG SQYDETGKVV RGPAPLSLAL AHTNVSDDKI VLTPWTETDF RTGDAPWWS

« Hide

References

[1]"Complete sequence of chromosome of Nostoc punctiforme ATCC 29133."
US DOE Joint Genome Institute
Copeland A., Lucas S., Lapidus A., Glavina del Rio T., Dalin E., Tice H., Pitluck S., Chain P., Malfatti S., Shin M., Vergez L., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N., Kim E., Meeks J.C. expand/collapse author list , Elhai J., Campbell E.L., Thiel T., Longmire J., Potts M., Atlas R.
Submitted (APR-2008) to the EMBL/GenBank/DDBJ databases
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: ATCC 29133 / PCC 73102.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ		CP001037 Genomic DNA. Translation: ACC78932.1.
RefSeqYP_001863875.1. NC_010628.1.

3D structure databases

ModBaseSearch...

Protein-protein interaction databases

STRINGB2J3K2.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

GeneID6249591.
GenomeReviewsGene locus Npun_R0132 in contig CP001037_GR.
KEGGnpu:Npun_R0132.
PATRIC22751862. VBINosPun48114_0150.

Organism-specific databases

CMRSearch...

Phylogenomic databases

HOGENOMHBG668715.
OMAYPVANYF.
PhylomeDBB2J3K2.
ProtClustDBPRK13474.

Family and domain databases

HAMAPMF_01335. Cytb6_f_Rieske.
[Tree]
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]
Gene3DG3DSA:2.102.10.10. Rieske_reg. 1 hit.
KOK02636.
PANTHERPTHR10134. Rieske. 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...

Entry information

Entry nameUCRI_NOSP7
AccessionPrimary (citable) accession number: B2J3K2
Entry history
Integrated into UniProtKB/Swiss-Prot: April 14, 2009
Last sequence update: June 10, 2008
Last modified: January 25, 2012
This is version 30 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families

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