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Protein

Cytochrome c oxidase subunit 4 isoform 2, mitochondrial

Gene

COX4I2

Organism
Homo sapiens (Human)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at protein leveli

Functioni

This protein is one of the nuclear-coded polypeptide chains of cytochrome c oxidase, the terminal oxidase in mitochondrial electron transport.

GO - Molecular functioni

  1. cytochrome-c oxidase activity Source: UniProtKB

GO - Biological processi

  1. cellular respiration Source: UniProtKB
  2. generation of precursor metabolites and energy Source: UniProtKB
  3. hydrogen ion transmembrane transport Source: GOC
  4. oxidation-reduction process Source: UniProtKB
Complete GO annotation...

Protein family/group databases

TCDBi3.D.4.11.1. the proton-translocating cytochrome oxidase (cox) superfamily.

Names & Taxonomyi

Protein namesi
Recommended name:
Cytochrome c oxidase subunit 4 isoform 2, mitochondrial
Alternative name(s):
Cytochrome c oxidase subunit IV isoform 2
Short name:
COX IV-2
Gene namesi
Name:COX4I2
Synonyms:COX4L2
OrganismiHomo sapiens (Human)
Taxonomic identifieri9606 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo
ProteomesiUP000005640: Chromosome 20

Organism-specific databases

HGNCiHGNC:16232. COX4I2.

Subcellular locationi

GO - Cellular componenti

  1. mitochondrial respiratory chain complex IV Source: UniProtKB
Complete GO annotation...

Keywords - Cellular componenti

Membrane, Mitochondrion, Mitochondrion inner membrane

Pathology & Biotechi

Involvement in diseasei

Exocrine pancreatic insufficiency dyserythropoietic anemia and calvarial hyperostosis1 Publication

The disease is caused by mutations affecting the gene represented in this entry.

Disease descriptionPatients present with pancreatic insufficiency, intestinal malabsorption, failure to thrive, and anemia soon after birth.

See also OMIM:612714
Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Natural varianti138 – 1381E → K in EPIDACH; expression in patient fibroblasts is reduced to 25% of control values in normoxic conditions; the mutant protein shows an impaired response to hypoxia. 1 Publication
Corresponds to variant rs119455950 [ dbSNP | Ensembl ].
VAR_058101

Keywords - Diseasei

Disease mutation

Organism-specific databases

MIMi612714. phenotype.
Orphaneti199337. Pancreatic insufficiency - anemia - hyperostosis.
PharmGKBiPA26783.

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini? – 171Cytochrome c oxidase subunit 4 isoform 2, mitochondrialPRO_0000006089
Transit peptidei1 – ?MitochondrionSequence Analysis

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Disulfide bondi40 ↔ 54Sequence Analysis

Keywords - PTMi

Disulfide bond

Proteomic databases

PaxDbiQ96KJ9.
PRIDEiQ96KJ9.

Expressioni

Tissue specificityi

Highly expressed in lung.

Gene expression databases

BgeeiQ96KJ9.
CleanExiHS_COX4I2.
ExpressionAtlasiQ96KJ9. baseline and differential.
GenevestigatoriQ96KJ9.

Organism-specific databases

HPAiHPA029307.

Interactioni

Protein-protein interaction databases

BioGridi124215. 2 interactions.
STRINGi9606.ENSP00000365243.

Structurei

3D structure databases

ProteinModelPortaliQ96KJ9.
SMRiQ96KJ9. Positions 43-171.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the cytochrome c oxidase IV family.Curated

Keywords - Domaini

Transit peptide

Phylogenomic databases

eggNOGiNOG328739.
GeneTreeiENSGT00390000002407.
HOGENOMiHOG000231486.
HOVERGENiHBG051087.
InParanoidiQ96KJ9.
KOiK02263.
OMAiLVIWWQR.
OrthoDBiEOG7BKCWF.
PhylomeDBiQ96KJ9.
TreeFamiTF105061.

Family and domain databases

Gene3Di1.10.442.10. 1 hit.
InterProiIPR013288. Cyt_c_oxidase_su4.
IPR004203. Cyt_c_oxidase_su4_fam.
[Graphical view]
PANTHERiPTHR10707. PTHR10707. 1 hit.
PfamiPF02936. COX4. 1 hit.
[Graphical view]
PRINTSiPR01873. CYTCOXIDASE4.
SUPFAMiSSF81406. SSF81406. 1 hit.

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

Q96KJ9-1 [UniParc]FASTAAdd to Basket

« Hide

        10         20         30         40         50
MLPRAAWSLV LRKGGGGRRG MHSSEGTTRG GGKMSPYTNC YAQRYYPMPE
60 70 80 90 100
EPFCTELNAE EQALKEKEKG SWTQLTHAEK VALYRLQFNE TFAEMNRRSN
110 120 130 140 150
EWKTVMGCVF FFIGFAALVI WWQRVYVFPP KPITLTDERK AQQLQRMLDM
160 170
KVNPVQGLAS RWDYEKKQWK K
Length:171
Mass (Da):20,010
Last modified:August 16, 2005 - v2
Checksum:iCD9BC8EC6EA3F4A3
GO

Natural variant

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Natural varianti138 – 1381E → K in EPIDACH; expression in patient fibroblasts is reduced to 25% of control values in normoxic conditions; the mutant protein shows an impaired response to hypoxia. 1 Publication
Corresponds to variant rs119455950 [ dbSNP | Ensembl ].
VAR_058101
Natural varianti161 – 1611R → H.1 Publication
Corresponds to variant rs11907253 [ dbSNP | Ensembl ].
VAR_033815

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF257180 mRNA. Translation: AAK49333.1.
AL117381 Genomic DNA. Translation: CAI23028.1.
BC057779 mRNA. Translation: AAH57779.1.
CCDSiCCDS13187.1.
RefSeqiNP_115998.2. NM_032609.2.
UniGeneiHs.277101.

Genome annotation databases

EnsembliENST00000376075; ENSP00000365243; ENSG00000131055.
GeneIDi84701.
KEGGihsa:84701.
UCSCiuc002wwj.1. human.

Polymorphism databases

DMDMi73620953.

Keywords - Coding sequence diversityi

Polymorphism

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF257180 mRNA. Translation: AAK49333.1.
AL117381 Genomic DNA. Translation: CAI23028.1.
BC057779 mRNA. Translation: AAH57779.1.
CCDSiCCDS13187.1.
RefSeqiNP_115998.2. NM_032609.2.
UniGeneiHs.277101.

3D structure databases

ProteinModelPortaliQ96KJ9.
SMRiQ96KJ9. Positions 43-171.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

BioGridi124215. 2 interactions.
STRINGi9606.ENSP00000365243.

Protein family/group databases

TCDBi3.D.4.11.1. the proton-translocating cytochrome oxidase (cox) superfamily.

Polymorphism databases

DMDMi73620953.

Proteomic databases

PaxDbiQ96KJ9.
PRIDEiQ96KJ9.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsembliENST00000376075; ENSP00000365243; ENSG00000131055.
GeneIDi84701.
KEGGihsa:84701.
UCSCiuc002wwj.1. human.

Organism-specific databases

CTDi84701.
GeneCardsiGC20P030225.
HGNCiHGNC:16232. COX4I2.
HPAiHPA029307.
MIMi607976. gene.
612714. phenotype.
neXtProtiNX_Q96KJ9.
Orphaneti199337. Pancreatic insufficiency - anemia - hyperostosis.
PharmGKBiPA26783.
GenAtlasiSearch...

Phylogenomic databases

eggNOGiNOG328739.
GeneTreeiENSGT00390000002407.
HOGENOMiHOG000231486.
HOVERGENiHBG051087.
InParanoidiQ96KJ9.
KOiK02263.
OMAiLVIWWQR.
OrthoDBiEOG7BKCWF.
PhylomeDBiQ96KJ9.
TreeFamiTF105061.

Miscellaneous databases

GeneWikiiCOX4I2.
GenomeRNAii84701.
NextBioi74788.
PROiQ96KJ9.
SOURCEiSearch...

Gene expression databases

BgeeiQ96KJ9.
CleanExiHS_COX4I2.
ExpressionAtlasiQ96KJ9. baseline and differential.
GenevestigatoriQ96KJ9.

Family and domain databases

Gene3Di1.10.442.10. 1 hit.
InterProiIPR013288. Cyt_c_oxidase_su4.
IPR004203. Cyt_c_oxidase_su4_fam.
[Graphical view]
PANTHERiPTHR10707. PTHR10707. 1 hit.
PfamiPF02936. COX4. 1 hit.
[Graphical view]
PRINTSiPR01873. CYTCOXIDASE4.
SUPFAMiSSF81406. SSF81406. 1 hit.
ProtoNetiSearch...

Publicationsi

« Hide 'large scale' publications
  1. "Mammalian subunit IV isoforms of cytochrome c oxidase."
    Huettemann M., Kadenbach B., Grossman L.I.
    Gene 267:111-123(2001) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [MRNA], VARIANT HIS-161.
  2. "The DNA sequence and comparative analysis of human chromosome 20."
    Deloukas P., Matthews L.H., Ashurst J.L., Burton J., Gilbert J.G.R., Jones M., Stavrides G., Almeida J.P., Babbage A.K., Bagguley C.L., Bailey J., Barlow K.F., Bates K.N., Beard L.M., Beare D.M., Beasley O.P., Bird C.P., Blakey S.E.
    , Bridgeman A.M., Brown A.J., Buck D., Burrill W.D., Butler A.P., Carder C., Carter N.P., Chapman J.C., Clamp M., Clark G., Clark L.N., Clark S.Y., Clee C.M., Clegg S., Cobley V.E., Collier R.E., Connor R.E., Corby N.R., Coulson A., Coville G.J., Deadman R., Dhami P.D., Dunn M., Ellington A.G., Frankland J.A., Fraser A., French L., Garner P., Grafham D.V., Griffiths C., Griffiths M.N.D., Gwilliam R., Hall R.E., Hammond S., Harley J.L., Heath P.D., Ho S., Holden J.L., Howden P.J., Huckle E., Hunt A.R., Hunt S.E., Jekosch K., Johnson C.M., Johnson D., Kay M.P., Kimberley A.M., King A., Knights A., Laird G.K., Lawlor S., Lehvaeslaiho M.H., Leversha M.A., Lloyd C., Lloyd D.M., Lovell J.D., Marsh V.L., Martin S.L., McConnachie L.J., McLay K., McMurray A.A., Milne S.A., Mistry D., Moore M.J.F., Mullikin J.C., Nickerson T., Oliver K., Parker A., Patel R., Pearce T.A.V., Peck A.I., Phillimore B.J.C.T., Prathalingam S.R., Plumb R.W., Ramsay H., Rice C.M., Ross M.T., Scott C.E., Sehra H.K., Shownkeen R., Sims S., Skuce C.D., Smith M.L., Soderlund C., Steward C.A., Sulston J.E., Swann R.M., Sycamore N., Taylor R., Tee L., Thomas D.W., Thorpe A., Tracey A., Tromans A.C., Vaudin M., Wall M., Wallis J.M., Whitehead S.L., Whittaker P., Willey D.L., Williams L., Williams S.A., Wilming L., Wray P.W., Hubbard T., Durbin R.M., Bentley D.R., Beck S., Rogers J.
    Nature 414:865-871(2001) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
  3. "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)."
    The MGC Project Team
    Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
    Tissue: Placenta.
  4. "Exocrine pancreatic insufficiency, dyserythropoeitic anemia, and calvarial hyperostosis are caused by a mutation in the COX4I2 gene."
    Shteyer E., Saada A., Shaag A., Al-Hijawi F.A., Kidess R., Revel-Vilk S., Elpeleg O.
    Am. J. Hum. Genet. 84:412-417(2009) [PubMed] [Europe PMC] [Abstract]
    Cited for: VARIANT EPIDACH LYS-138, CHARACTERIZATION OF VARIANT EPIDACH LYS-138.

Entry informationi

Entry nameiCOX42_HUMAN
AccessioniPrimary (citable) accession number: Q96KJ9
Secondary accession number(s): Q6GTF4, Q9H0Z4
Entry historyi
Integrated into UniProtKB/Swiss-Prot: April 3, 2002
Last sequence update: August 16, 2005
Last modified: January 7, 2015
This is version 112 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Human chromosome 20
    Human chromosome 20: entries, gene names and cross-references to MIM
  2. Human entries with polymorphisms or disease mutations
    List of human entries with polymorphisms or disease mutations
  3. Human polymorphisms and disease mutations
    Index of human polymorphisms and disease mutations
  4. MIM cross-references
    Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
  5. 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.