Cytochrome b6-f complex iron-sulfur subunit 2 - Anabaena variabilis (strain ATCC 29413 / PCC 7937)

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Reviewed, UniProtKB/Swiss-Prot Q93SW6 (UCRIB_ANAVT)

Last modified November 3, 2009. Version 57. History...

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Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents

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Names and origin

Protein names

Recommended name:
    Cytochrome b6-f complex iron-sulfur subunit 2
    EC=1.10.99.1
Alternative name(s):
    Rieske iron-sulfur protein
    Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein
      Short name=ISP
      Short name=RISP

Gene names

Name:	petC2
Ordered Locus Names:	Ava_3377

Organism

Anabaena variabilis (strain ATCC 29413 / PCC 7937) [Complete proteome] [HAMAP]

Taxonomic identifier

240292 [NCBI]

Taxonomic lineage

Bacteria › Cyanobacteria › Nostocales › Nostocaceae › Anabaena

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Protein attributes

Sequence length	178 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

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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.
Catalytic activity	Plastoquinol-1 + 2 oxidized plastocyanin = plastoquinone + 2 reduced plastocyanin. HAMAP 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.
Miscellaneous	The Rieske iron-sulfur protein is a high potential 2Fe-2S protein. HAMAP MF_01335
Sequence similarities	Contains 1 Rieske domain.

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Ontologies

Keywords
Biological process	Electron transport Transport
Cellular component	Membrane Thylakoid
Domain	Transmembrane
Ligand	2Fe-2S Iron Iron-sulfur Metal-binding
Molecular function	Oxidoreductase
PTM	Disulfide bond
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	electron transport chain Inferred from electronic annotation. Source: UniProtKB-KW photosynthesis Inferred from electronic annotation. Source: HAMAP transport Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	integral to membrane Inferred from electronic annotation. Source: UniProtKB-SubCell thylakoid membrane Inferred from electronic annotation. Source: InterPro
Molecular function	2 iron, 2 sulfur cluster binding Inferred from electronic annotation. Source: UniProtKB-KW electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity Inferred from electronic annotation. Source: HAMAP iron ion binding Inferred from electronic annotation. Source: UniProtKB-KW plastoquinol-plastocyanin reductase activity Inferred from electronic annotation. Source: HAMAP ubiquinol-cytochrome-c reductase activity Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

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Sequence annotation (Features)

Feature key

Position(s)

Length

Description

Graphical view

Feature identifier

Molecule processing

Chain

1 – 178

178

Cytochrome b6-f complex iron-sulfur subunit 2 HAMAP MF_01335

PRO_0000127771

Regions

Transmembrane

17 – 36

Potential

Domain

61 – 161

101

Rieske

Sites

Metal binding

107

Iron-sulfur (2Fe-2S) By similarity

Metal binding

109

Iron-sulfur (2Fe-2S); via pros nitrogen By similarity

Metal binding

125

Iron-sulfur (2Fe-2S) By similarity

Metal binding

128

Iron-sulfur (2Fe-2S); via pros nitrogen By similarity

Amino acid modifications

Disulfide bond

112 ↔ 127

By similarity

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Sequences

Sequence

Length

Mass (Da)

Tools

Q93SW6-1 [UniParc].

Last modified December 1, 2001. Version 1.
Checksum: 1FD3CCB6CCD262F9
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FASTA

178

19,468

        10         20         30         40         50         60 
MDDTLNQLNP SMSRRQLLNF FTGAIVAATA SAAIYPATKF FMPPAESTDA EGGVLAKDKI 

        70         80         90        100        110        120 
GHPIPASQIL VQASGTRALI AGLAGEPTYL TVREDGTLDP MGIVNNCTHL GCTFPWNPVD 

       130        140        150        160        170 
QQFQCPCHGS RYDAQGSVER GPANRPLKLV HVQVKDDYIW ISSWQETDPR TGEKPWWV

« Hide

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References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"b6f complex of Anabaena variabilis, 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 sequence of Anabaena variabilis ATCC 29413." Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T., Hammon N., Israni S., Pitluck S., Saunders E.H., Schmutz J., Larimer F., Land M., Kyrpides N., Mavrommatis K., Richardson P. Submitted (SEP-2005) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

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Cross-references

Sequence databases
	AJ311360 Genomic DNA. Translation: CAC39244.1. CP000117 Genomic DNA. Translation: ABA22984.1.
RefSeq	YP_323879.1.
3D structure databases
HSSP	HSSP built from PDB template 1RFS based on UniProtKB P08980.
ModBase	Search...
Protein-protein interaction databases
STRING	Q93SW6.
Genome annotation databases
GeneID	3680077.
GenomeReviews	Gene locus Ava_3377 in contig CP000117_GR.
KEGG	ava:Ava_3377.
NMPDR	fig\|240292.3.peg.841.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q93SW6.
OMA	GEPTYLT.
Enzyme and pathway databases
BioCyc	AVAR240292:AVA_3377-MON.
Family and domain databases
HAMAP	MF_01335. [Tree]
InterPro	IPR014909. Cyt_b6-f_cplx_Fe-S_su. IPR017941. Rieske_2Fe-2S. IPR014349. Rieske_Fe-S_prot. IPR005805. Rieske_Fe-S_prot_C. IPR017909. Twin_arg_translocation_Tat. [Graphical view]
Gene3D	G3DSA:2.102.10.10. Rieske_reg. 1 hit.
PANTHER	PTHR10134. Rieske. 1 hit.
Pfam	PF08802. CytB6-F_Fe-S. 1 hit. PF00355. Rieske. 1 hit. [Graphical view]
PRINTS	PR00162. RIESKE.
PROSITE	PS51296. RIESKE. 1 hit. PS51318. TAT. 1 hit. [Graphical view]
ProtoNet	Search...

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Entry information

Entry name

UCRIB_ANAVT

Accession

Primary (citable) accession number: Q93SW6
Secondary accession number(s): Q3M7Q2

Entry history

Integrated into UniProtKB/Swiss-Prot:	July 5, 2005
Last sequence update:	December 1, 2001
Last modified:	November 3, 2009
This is version 57 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)

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Relevant documents

SIMILARITY comments

Index of protein domains and families

Names and origin

Protein attributes

General annotation (Comments)

Ontologies

Sequence annotation (Features)

Molecule processing

Regions

Sites

Amino acid modifications

Sequences

References

Cross-references

Sequence databases

3D structure databases

Protein-protein interaction databases

Genome annotation databases

Organism-specific databases

Phylogenomic databases

Enzyme and pathway databases

Family and domain databases

Entry information

Relevant documents