Reviewed, UniProtKB/Swiss-Prot Q114L6 (UCRI_TRIEI)

Names and origin

Protein names

Recommended name:
    Cytochrome b6-f complex iron-sulfur subunit
    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:	petC
Ordered Locus Names:	Tery_1799

Organism

Trichodesmium erythraeum (strain IMS101) [Complete proteome] [HAMAP]

Taxonomic identifier

203124 [NCBI]

Taxonomic lineage

Bacteria › Cyanobacteria › Oscillatoriales › Trichodesmium

Protein attributes

Sequence length	179 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred 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.
Catalytic activity	Plastoquinol-1 + 2 oxidized plastocyanin = plastoquinone + 2 reduced plastocyanin.
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 proteinBy 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.
Sequence similarities	Contains 1 Rieske domain.

Ontologies

Keywords
Biological process	Electron transport Transport
Cellular component	Membrane Thylakoid
Domain	Transmembrane
Ligand	2Fe-2S Iron Iron-sulfur Metal-binding
Molecular function	Oxidoreductase
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-KW thylakoid membrane Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	2 iron, 2 sulfur cluster binding Inferred from electronic annotation. Source: InterPro 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...

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		PRO_0000298469
Regions
	Transmembrane	21 – 43	23	Potential
	Domain	61 – 162	102	Rieske
Sites
	Metal binding	108	1	Iron-sulfur (2Fe-2S) By similarity
	Metal binding	110	1	Iron-sulfur (2Fe-2S); via pros nitrogen By similarity
	Metal binding	126	1	Iron-sulfur (2Fe-2S) By similarity
	Metal binding	129	1	Iron-sulfur (2Fe-2S); via pros nitrogen By similarity
Amino acid modifications
	Disulfide bond	113 ↔ 128		By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q114L6-1 [UniParc]. Last modified August 22, 2006. Version 1. Checksum: 572CE261AE78F317	FASTA	179	19,116
	10 20 30 40 50 60 MAQAEGTPDV PSMGRRQFMN LLTFGTVTGV ALGALYPVVN YFIPPSSGGS GGGVTAKDAL 70 80 90 100 110 120 GNDIIVSEFL ANHNSGERTL AQGLKGDPTY VVIEGEQTLA EYGLNAVCTH LGCVVPWNGS 130 140 150 160 170 ENKFICPCHG SQYDNTGKVV RGPAPLSLAL VHANVSDDKL VFTQWEETDF RTGEKPWWV

References

[1]

"Complete sequence of Trichodesmium erythraeum IMS101." Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S., Kiss H., Munk A.C., Brettin T., Bruce D., Han C., Tapia R., Gilna P. , Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N., Kim E., Richardson P. Submitted (JUN-2006) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000393 Genomic DNA. Translation: ABG51058.1.
RefSeq	YP_721531.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	4243781.
GenomeReviews	Gene locus Tery_1799 in contig CP000393_GR.
KEGG	ter:Tery_1799.
NMPDR	fig|203124.1.peg.418.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q114L6.
Enzyme and pathway databases
BioCyc	TERY203124:TERY_1799-MON.
Family and domain databases
HAMAP	MF_01335. [Tree]
InterPro	IPR014909. Cyt_b6-F_Fe-S_su. IPR014349. Rieske. IPR005805. Rieske_C. IPR005806. Rieske_reg. [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. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

UCRI_TRIEI

Accession

Primary (citable) accession number: Q114L6

Entry history

Integrated into UniProtKB/Swiss-Prot:	August 21, 2007
Last sequence update:	August 22, 2006
Last modified:	November 25, 2008
This is version 25 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)