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Protein

Cytochrome c oxidase subunit 2

Gene

COII

Organism
Branchiostoma lanceolatum (Common lancelet) (Amphioxus lanceolatum)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Cytochrome c oxidase is the component of the respiratory chain that catalyzes the reduction of oxygen to water. Subunits 1-3 form the functional core of the enzyme complex. Subunit 2 transfers the electrons from cytochrome c via its binuclear copper A center to the bimetallic center of the catalytic subunit 1.

Catalytic activityi

4 ferrocytochrome c + O2 + 4 H+ = 4 ferricytochrome c + 2 H2O.

Cofactori

Cu cationNote: Binds a copper A center.

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi161 – 1611Copper ACurated
Metal bindingi196 – 1961Copper ACurated
Metal bindingi200 – 2001Copper ACurated
Metal bindingi204 – 2041Copper ACurated

GO - Molecular functioni

  1. copper ion binding Source: InterPro
  2. cytochrome-c oxidase activity Source: UniProtKB-EC

GO - Biological processi

  1. electron transport chain Source: InterPro
Complete GO annotation...

Keywords - Molecular functioni

Oxidoreductase

Keywords - Biological processi

Electron transport, Respiratory chain, Transport

Keywords - Ligandi

Copper, Metal-binding

Names & Taxonomyi

Protein namesi
Recommended name:
Cytochrome c oxidase subunit 2 (EC:1.9.3.1)
Alternative name(s):
Cytochrome c oxidase polypeptide II
Gene namesi
Name:COII
Encoded oniMitochondrion
OrganismiBranchiostoma lanceolatum (Common lancelet) (Amphioxus lanceolatum)
Taxonomic identifieri7740 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCephalochordataBranchiostomidaeBranchiostoma

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Topological domaini1 – 2626Mitochondrial intermembraneSequence AnalysisAdd
BLAST
Transmembranei27 – 4822HelicalSequence AnalysisAdd
BLAST
Topological domaini49 – 6214Mitochondrial matrixSequence AnalysisAdd
BLAST
Transmembranei63 – 8220HelicalSequence AnalysisAdd
BLAST
Topological domaini83 – 239157Mitochondrial intermembraneSequence AnalysisAdd
BLAST

GO - Cellular componenti

  1. integral component of membrane Source: UniProtKB-KW
  2. mitochondrial inner membrane Source: UniProtKB-SubCell
  3. respiratory chain Source: UniProtKB-KW
Complete GO annotation...

Keywords - Cellular componenti

Membrane, Mitochondrion, Mitochondrion inner membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 239239Cytochrome c oxidase subunit 2PRO_0000183519Add
BLAST

Structurei

3D structure databases

ProteinModelPortaliO79417.
SMRiO79417. Positions 1-226.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

HOVERGENiHBG012727.

Family and domain databases

Gene3Di1.10.287.90. 1 hit.
2.60.40.420. 1 hit.
InterProiIPR001505. Copper_CuA.
IPR008972. Cupredoxin.
IPR014222. Cyt_c_oxidase_su2.
IPR002429. Cyt_c_oxidase_su2_C.
IPR011759. Cyt_c_oxidase_su2_TM_dom.
[Graphical view]
PfamiPF00116. COX2. 1 hit.
PF02790. COX2_TM. 1 hit.
[Graphical view]
SUPFAMiSSF49503. SSF49503. 1 hit.
SSF81464. SSF81464. 1 hit.
TIGRFAMsiTIGR02866. CoxB. 1 hit.
PROSITEiPS00078. COX2. 1 hit.
PS50857. COX2_CUA. 1 hit.
PS50999. COX2_TM. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

O79417-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MATPAQLGLM DAASPVMEEM IYFHDHVMLV LILITCLIFY SMLVLISSKY
60 70 80 90 100
IYRFLTDGHV IETVWTVIPA IILVVVALPS LKLLYLTDEL DNPQLTIKSV
110 120 130 140 150
GHQWYWSYEY TDYYDIEFDS YMLPLGDLSK GDARLLEVDN RVVLPVDTSV
160 170 180 190 200
RVLVTAADVI HSWTVPSLGL KMDAVPGRLN QLALQCSRVG TFYGQCSEIC
210 220 230
GANHSFMPIV IEAVPVEVFE GWCDMMLDEE SLGSLNMKR
Length:239
Mass (Da):26,951
Last modified:November 1, 1998 - v1
Checksum:i8B0BD35AF34BCFC7
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Y16474 Genomic DNA. Translation: CAA76250.1.
PIRiE71390.
RefSeqiNP_007540.1. NC_001912.1.

Genome annotation databases

GeneIDi808207.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Y16474 Genomic DNA. Translation: CAA76250.1.
PIRiE71390.
RefSeqiNP_007540.1. NC_001912.1.

3D structure databases

ProteinModelPortaliO79417.
SMRiO79417. Positions 1-226.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

GeneIDi808207.

Organism-specific databases

CTDi4513.

Phylogenomic databases

HOVERGENiHBG012727.

Family and domain databases

Gene3Di1.10.287.90. 1 hit.
2.60.40.420. 1 hit.
InterProiIPR001505. Copper_CuA.
IPR008972. Cupredoxin.
IPR014222. Cyt_c_oxidase_su2.
IPR002429. Cyt_c_oxidase_su2_C.
IPR011759. Cyt_c_oxidase_su2_TM_dom.
[Graphical view]
PfamiPF00116. COX2. 1 hit.
PF02790. COX2_TM. 1 hit.
[Graphical view]
SUPFAMiSSF49503. SSF49503. 1 hit.
SSF81464. SSF81464. 1 hit.
TIGRFAMsiTIGR02866. CoxB. 1 hit.
PROSITEiPS00078. COX2. 1 hit.
PS50857. COX2_CUA. 1 hit.
PS50999. COX2_TM. 1 hit.
[Graphical view]
ProtoNetiSearch...

Publicationsi

  1. "Complete sequence of the amphioxus (Branchiostoma lanceolatum) mitochondrial genome: relations to vertebrates."
    Spruyt N., Delarbre C., Gachelin G., Laudet V.
    Nucleic Acids Res. 26:3279-3285(1998) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].

Entry informationi

Entry nameiCOX2_BRALA
AccessioniPrimary (citable) accession number: O79417
Entry historyi
Integrated into UniProtKB/Swiss-Prot: December 15, 1998
Last sequence update: November 1, 1998
Last modified: January 7, 2015
This is version 87 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into Uniref entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.