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Protein

Cytochrome c oxidase subunit 2

Gene

mt-co2

Organism
Salmo salar (Atlantic salmon)
Status
Reviewed-Annotation score: Annotation score: 4 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)DescriptionActionsGraphical viewLength
Metal bindingi161Copper ACurated1
Metal bindingi196Copper ACurated1
Metal bindingi200Copper ACurated1
Metal bindingi204Copper ACurated1

GO - Molecular functioni

GO - Biological processi

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:mt-co2
Synonyms:coii, coxii, mtco2
Encoded oniMitochondrion
OrganismiSalmo salar (Atlantic salmon)
Taxonomic identifieri8030 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiActinopterygiiNeopterygiiTeleosteiProtacanthopterygiiSalmoniformesSalmonidaeSalmoninaeSalmo

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini1 – 26Mitochondrial intermembraneSequence analysisAdd BLAST26
Transmembranei27 – 48HelicalCuratedAdd BLAST22
Topological domaini49 – 62Mitochondrial matrixSequence analysisAdd BLAST14
Transmembranei63 – 82HelicalCuratedAdd BLAST20
Topological domaini83 – 230Mitochondrial intermembraneSequence analysisAdd BLAST148

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Membrane, Mitochondrion, Mitochondrion inner membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001836831 – 230Cytochrome c oxidase subunit 2Add BLAST230

Structurei

3D structure databases

ProteinModelPortaliQ37677.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

HOVERGENiHBG012727.
KOiK02261.

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.

Q37677-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MAHPSQLGFQ DAASPVMEEL LHFHDHALMI VLLISTLVLY IIVAMVSTKL
60 70 80 90 100
TNKYILDSQE IEIVWTVLPA VILILIALPS LRILYLMDEI NDPHLTIKAM
110 120 130 140 150
GHQWYWSYEY TDYEDLGFDS YMVPTQDLTP GQFRLLETDH RMVVPVESPI
160 170 180 190 200
RVLVSAEDVL HSWAVPSLGV KMDASPGRLN QTAFIASRPG VFYGQCSEIC
210 220 230
GANHSFMPIV VEAVPLEHFE KWSTMMLEDA
Length:230
Mass (Da):26,016
Last modified:January 11, 2001 - v3
Checksum:i405C95AA58112AF4
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti175S → V in AAD04736 (PubMed:10548724).Curated1
Sequence conflicti209I → V in AAB08524 (Ref. 3) Curated1
Sequence conflicti227 – 230LEDA → TW in AAB08524 (Ref. 3) Curated4

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U12143 Genomic DNA. Translation: AAD04736.1.
AF133701 Genomic DNA. Translation: AAF61381.1.
L04501 Genomic DNA. Translation: AAB08524.1.
PIRiT09950.
RefSeqiNP_008448.1. NC_001960.1.

Genome annotation databases

GeneIDi808315.
KEGGisasa:808315.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U12143 Genomic DNA. Translation: AAD04736.1.
AF133701 Genomic DNA. Translation: AAF61381.1.
L04501 Genomic DNA. Translation: AAB08524.1.
PIRiT09950.
RefSeqiNP_008448.1. NC_001960.1.

3D structure databases

ProteinModelPortaliQ37677.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

GeneIDi808315.
KEGGisasa:808315.

Organism-specific databases

CTDi4513.

Phylogenomic databases

HOVERGENiHBG012727.
KOiK02261.

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...

Entry informationi

Entry nameiCOX2_SALSA
AccessioniPrimary (citable) accession number: Q37677
Secondary accession number(s): Q9MPG8
Entry historyi
Integrated into UniProtKB/Swiss-Prot: November 1, 1997
Last sequence update: January 11, 2001
Last modified: November 30, 2016
This is version 98 of the entry and version 3 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

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 one 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.