Cytochrome bc complex cytochrome b subunit

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Q9F721 (CYB6_CHLTE) Reviewed, UniProtKB/Swiss-Prot

Last modified January 25, 2012. Version 78. History...

Clusters with 100%, 90%, 50% identity |

Documents (1) |

Third-party data

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Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·Documents Customize order

Names and origin

Protein names

Recommended name:
Cytochrome bc complex cytochrome b subunit

Gene names

Name:	petB
Ordered Locus Names:	CT0303

Organism

Chlorobium tepidum

Taxonomic identifier

1097 [NCBI]

Taxonomic lineage

Bacteria › Chlorobi › Chlorobia › Chlorobiales › Chlorobiaceae › Chlorobaculum

Protein attributes

Sequence length	428 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Inferred from homology

General annotation (Comments)

Function	Component of the green S-bacteria bc complex, which consists of the Rieske protein and cytochrome b subunit but appears to lack a cytochrome c1-equivalent. This complex has a comparatively low redox potential By similarity.
Cofactor	Binds 2 heme groups non-covalently By similarity.
Subcellular location	Cell membrane; Multi-pass membrane protein Potential.
Miscellaneous	Heme 1 (or BL or b562) is low-potential and absorbs at about 562 nm, and heme 2 (or BH or b566) is high-potential and absorbs at about 566 nm By similarity.
Sequence similarities	Belongs to the cytochrome b family.

Ontologies

Keywords
Biological process	Electron transport Respiratory chain Transport
Cellular component	Cell membrane Membrane
Domain	Transmembrane Transmembrane helix
Ligand	Heme Iron Metal-binding
Technical term	Complete proteome Reference proteome
Gene Ontology (GO)
Biological process	respiratory electron transport chain Inferred from electronic annotation. Source: InterPro transport Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	integral to membrane Inferred from electronic annotation. Source: UniProtKB-KW plasma membrane Inferred from electronic annotation. Source: UniProtKB-SubCell respiratory chain Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	electron carrier activity Inferred from electronic annotation. Source: InterPro metal ion binding Inferred from electronic annotation. Source: UniProtKB-KW oxidoreductase 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

Initiator methionine

Removed By similarity

Chain

2 – 428

427

Cytochrome bc complex cytochrome b subunit

PRO_0000061917

Regions

Transmembrane

108 – 128

Helical; Potential

Transmembrane

160 – 180

Helical; Potential

Transmembrane

191 – 211

Helical; Potential

Transmembrane

258 – 278

Helical; Potential

Transmembrane

310 – 329

Helical; Potential

Transmembrane

367 – 387

Helical; Potential

Transmembrane

399 – 419

Helical; Potential

Sites

Metal binding

159

Iron 1 (heme b562 axial ligand) By similarity

Metal binding

173

Iron 2 (heme b566 axial ligand) By similarity

Metal binding

259

Iron 1 (heme b562 axial ligand) By similarity

Metal binding

274

Iron 2 (heme b566 axial ligand) By similarity

Sequences

Sequence

Length

Mass (Da)

Tools

Q9F721 [UniParc].

Last modified January 23, 2007. Version 3.
Checksum: CA63747E6A132595
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FASTA

428

47,495

        10         20         30         40         50         60 
MAENTQNPAA GTAPAKPKPA VPGAAKPAAP GAAKPAAKAP AKPAAPAATA PSGVYKPPVD 

        70         80         90        100        110        120 
RPDPNPFKDS KMSGVASWFQ ERFYVLNPII DYMKHKEVPK HRLSFWYYFG GLGLFFFIIQ 

       130        140        150        160        170        180 
ILTGLLLLQY YKPTETDAFS SFLFIQGQVP FGWLIRQIHA WSANLMILML FIHMFSTFFM 

       190        200        210        220        230        240 
KSYRKPRELL WVSGFILLVL TLGFGFTGYL LPWNELAFFA TQVGTEVPKV APGGAFLVEI 

       250        260        270        280        290        300 
LRGGPDVSGE TLTRMFSLHV VLLPGLVMLV LAAHLTLVQV LGTSAPIGYK EAGLIKGYDK 

       310        320        330        340        350        360 
FFPTFLAKDG IGWLIGFALL VYLAVMFPWE IGVKANPLSP APVGIKPEWY FWAQFQLLKD 

       370        380        390        400        410        420 
FKFEGGELLA IILFTIGGVV WMLVPFLDRQ ASQEKKSPMF TIFGLLVLAF LLINTYRVYD 


SYVLHLPK

« Hide

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Molecular evidence for the early evolution of photosynthesis." Xiong J., Fischer W.M., Inoue K., Nakahara M., Bauer C.E. Science 289:1724-1730(2000) [PubMed: 10976061] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]. Strain: ATCC 49652 / DSM 12025 / TLS.
[2]	"The complete genome sequence of Chlorobium tepidum TLS, a photosynthetic, anaerobic, green-sulfur bacterium." Eisen J.A., Nelson K.E., Paulsen I.T., Heidelberg J.F., Wu M., Dodson R.J., DeBoy R.T., Gwinn M.L., Nelson W.C., Haft D.H., Hickey E.K., Peterson J.D., Durkin A.S., Kolonay J.F., Yang F., Holt I.E., Umayam L.A., Mason T.M. Fraser C.M. Proc. Natl. Acad. Sci. U.S.A. 99:9509-9514(2002) [PubMed: 12093901] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 49652 / DSM 12025 / TLS.

Cross-references

Sequence databases
EMBL GenBank DDBJ	AF287480 Genomic DNA. Translation: AAG12195.1. AE006470 Genomic DNA. Translation: AAM71549.1.
RefSeq	NP_661207.1. NC_002932.3.
3D structure databases
ProteinModelPortal	Q9F721.
ModBase	Search...
Proteomic databases
PRIDE	Q9F721.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	1007963.
GenomeReviews	Gene locus CT0303 in contig AE006470_GR.
KEGG	cte:CT0303.
NMPDR	fig\|194439.1.peg.301.
PATRIC	21398721. VBIChlTep116050_0293.
TIGR	CT0303.
Phylogenomic databases
HOGENOM	HBG487932.
OMA	FTGWIDQ.
ProtClustDB	CLSK637272.
Enzyme and pathway databases
BioCyc	CTEP194439:CT_0303-MONOMER.
Family and domain databases
InterPro	IPR016175. Cyt_b/b6. IPR005798. Cyt_b/b6_C. IPR005797. Cyt_b/b6_N. IPR016174. Di-haem_cyt_TM. [Graphical view]
Gene3D	G3DSA:1.20.810.10. Cytochrome_b/b6. 1 hit.
KO	K02635.
PANTHER	PTHR19271. Cytochrome_b/b6. 1 hit.
Pfam	PF00032. Cytochrom_B_C. 1 hit. PF00033. Cytochrom_B_N. 1 hit. [Graphical view]
SUPFAM	SSF81648. Cytochrome_b/b6_C. 1 hit. SSF81342. Transmembr_di-haem_cytochrome. 1 hit.
PROSITE	PS51003. CYTB_CTER. 1 hit. PS51002. CYTB_NTER. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

CYB6_CHLTE

Accession

Primary (citable) accession number: Q9F721

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 27, 2001
Last sequence update:	January 23, 2007
Last modified:	January 25, 2012
This is version 78 of the entry and version 3 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families

Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·Documents

Preferred order of sections

Names and origin

Protein attributes

General annotation (Comments)

Ontologies

Sequence annotation (Features)

Molecule processing

Regions

Sites

Sequences

References

Cross-references

Sequence databases

3D structure databases

Proteomic databases

Protocols and materials databases

Genome annotation databases

Phylogenomic databases

Enzyme and pathway databases

Family and domain databases

Entry information

Relevant documents