Cytochrome b6-f complex iron-sulfur subunit 1 - Anabaena sp. (strain PCC 7120)

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Reviewed, UniProtKB/Swiss-Prot Q93SX0 (UCRIA_ANASP)

Last modified November 3, 2009. Version 56. 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 1
    EC=1.10.99.1
Alternative name(s):
    Rieske iron-sulfur protein 1
    Plastohydroquinone:plastocyanin oxidoreductase iron-sulfur protein 1
      Short name=ISP 1
      Short name=RISP 1

Gene names

Name:	petC1
Ordered Locus Names:	all2453

Organism

Anabaena sp. (strain PCC 7120) [Complete proteome] [HAMAP]

Taxonomic identifier

103690 [NCBI]

Taxonomic lineage

Bacteria › Cyanobacteria › Nostocales › Nostocaceae › Nostoc

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Protein attributes

Sequence length	179 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Evidence at protein level.

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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	3D-structure 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 – 179

179

Cytochrome b6-f complex iron-sulfur subunit 1 HAMAP MF_01335

PRO_0000127767

Regions

Transmembrane

21 – 43

Potential

Domain

61 – 162

102

Rieske

Sites

Metal binding

108

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

Metal binding

110

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

Metal binding

126

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

Metal binding

129

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

Amino acid modifications

Disulfide bond

113 ↔ 128

By similarity

Secondary structure

179

Helix Strand Turn

Details...

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Sequences

Sequence

Length

Mass (Da)

Tools

Q93SX0-1 [UniParc].

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

179

19,198

        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

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References

	« Hide 'large scale' referencesShow '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. , Takazawa M., Yamada M., Yasuda M., Tabata S. DNA Res. 8:205-213(2001) [PubMed: 11759840] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

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Cross-references

Sequence databases

AJ319646 Genomic DNA. Translation: CAC39604.1.
BA000019 Genomic DNA. Translation: BAB74152.1.

PIR

AF2112.

RefSeq

NP_486493.1.

3D structure databases

Entry	Method	Resolution (Å)	Chain	Positions	PDBsum
2ZT9	X-ray	3.00	D	1-179	[»]

SMR

Q93SX0. Positions 12-178.

ModBase

Search...

Protein-protein interaction databases

STRING

Q93SX0.

Genome annotation databases

GeneID

1106050.

GenomeReviews

Gene locus all2453 in contig BA000019_GR.

KEGG

ana:all2453.

NMPDR

fig|103690.1.peg.2760.

Organism-specific databases

CMR

Search...

Phylogenomic databases

HOGENOM

Q93SX0.

OMA

YPVANYF.

Enzyme and pathway databases

BioCyc

NSP103690:ALL2453-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.
IPR006311. TAT_signal.
[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.

TIGRFAMs

TIGR01409. TAT_signal_seq. 1 hit.

PROSITE

PS51296. RIESKE. 1 hit.
[Graphical view]

ProtoNet

Search...

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Entry information

Entry name

UCRIA_ANASP

Accession

Primary (citable) accession number: Q93SX0

Entry history

Integrated into UniProtKB/Swiss-Prot:	July 5, 2005
Last sequence update:	December 1, 2001
Last modified:	November 3, 2009
This is version 56 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

PDB cross-references

Index of Protein Data Bank (PDB) cross-references

SIMILARITY comments

Index of protein domains and families