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COX4I1 cytochrome c oxidase subunit 4I1 [ Homo sapiens (human) ]

Gene ID: 1327, updated on 22-Jan-2020

Summary

Official Symbol
COX4I1provided by HGNC
Official Full Name
cytochrome c oxidase subunit 4I1provided by HGNC
Primary source
HGNC:HGNC:2265
See related
Ensembl:ENSG00000131143 MIM:123864
Gene type
protein coding
RefSeq status
REVIEWED
Organism
Homo sapiens
Lineage
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as
COX4; COXIV; COX4-1; COXIV-1; COX IV-1
Summary
Cytochrome c oxidase (COX) is the terminal enzyme of the mitochondrial respiratory chain. It is a multi-subunit enzyme complex that couples the transfer of electrons from cytochrome c to molecular oxygen and contributes to a proton electrochemical gradient across the inner mitochondrial membrane. The complex consists of 13 mitochondrial- and nuclear-encoded subunits. The mitochondrially-encoded subunits perform the electron transfer and proton pumping activities. The functions of the nuclear-encoded subunits are unknown but they may play a role in the regulation and assembly of the complex. This gene encodes the nuclear-encoded subunit IV isoform 1 of the human mitochondrial respiratory chain enzyme. It is located at the 3' of the NOC4 (neighbor of COX4) gene in a head-to-head orientation, and shares a promoter with it. Pseudogenes related to this gene are located on chromosomes 13 and 14. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jan 2016]
Expression
Ubiquitous expression in heart (RPKM 267.7), duodenum (RPKM 151.5) and 25 other tissues See more
Orthologs

Genomic context

See COX4I1 in Genome Data Viewer
Location:
16q24.1
Exon count:
6
Annotation release Status Assembly Chr Location
109.20191205 current GRCh38.p13 (GCF_000001405.39) 16 NC_000016.10 (85799695..85807068)
105 previous assembly GRCh37.p13 (GCF_000001405.25) 16 NC_000016.9 (85833173..85840608)

Chromosome 16 - NC_000016.10Genomic Context describing neighboring genes Neighboring gene ER membrane protein complex subunit 8 Neighboring gene RNA, U1 small nuclear 103, pseudogene Neighboring gene uncharacterized LOC101928557 Neighboring gene iron-sulfur cluster assembly 1 homolog (S. cerevisiae) pseudogene Neighboring gene ribosomal protein L10a pseudogene 12

Genomic regions, transcripts, and products

Expression

  • Project title: HPA RNA-seq normal tissues
  • Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
  • BioProject: PRJEB4337
  • Publication: PMID 24309898
  • Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Phenotypes

NHGRI GWAS Catalog

Description
Discovery of six new susceptibility loci and analysis of pleiotropic effects in leprosy.
NHGRI GWA Catalog
Genome-wide association analyses suggest NELL1 influences adverse metabolic response to HCTZ in African Americans.
NHGRI GWA Catalog

HIV-1 interactions

Protein interactions

Protein Gene Interaction Pubs
Envelope surface glycoprotein gp160, precursor env HIV-1 gp160 is identified to have a physical interaction with cytochrome c oxidase subunit IV isoform 1 (COX4I1) in human HEK293 and/or Jurkat cell lines by using affinity tagging and purification mass spectrometry analyses PubMed
Envelope transmembrane glycoprotein gp41 env HIV-1 gp41 is identified to have a physical interaction with cytochrome c oxidase subunit IV isoform 1 (COX4I1) in human HEK293 and/or Jurkat cell lines by using affinity tagging and purification mass spectrometry analyses PubMed
Tat tat Tat-induced mitochondrial membrane permeabilization is associated with inhibition of cytochrome c oxidase (COX) activity by Tat in disrupted mitochondria from human samples PubMed
Vpr vpr HIV-1 Vpr and FAT10 co-localize to mitochondria with marker protein Cox4 PubMed

Go to the HIV-1, Human Interaction Database

Pathways from PubChem

Interactions

Products Interactant Other Gene Complex Source Pubs Description

General gene information

Markers

Homology

Clone Names

  • FLJ23483, MGC72016

Gene Ontology Provided by GOA

Function Evidence Code Pubs
contributes_to cytochrome-c oxidase activity IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
protein binding IPI
Inferred from Physical Interaction
more info
PubMed 
Process Evidence Code Pubs
generation of precursor metabolites and energy TAS
Traceable Author Statement
more info
PubMed 
mitochondrial electron transport, cytochrome c to oxygen IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
mitochondrial electron transport, cytochrome c to oxygen TAS
Traceable Author Statement
more info
 
proton transmembrane transport IEA
Inferred from Electronic Annotation
more info
 
response to nutrient IEA
Inferred from Electronic Annotation
more info
 
Component Evidence Code Pubs
membrane HDA PubMed 
mitochondrial inner membrane ISS
Inferred from Sequence or Structural Similarity
more info
 
mitochondrial inner membrane TAS
Traceable Author Statement
more info
 
mitochondrial respiratory chain complex IV IBA
Inferred from Biological aspect of Ancestor
more info
PubMed 
mitochondrial respiratory chain complex IV IMP
Inferred from Mutant Phenotype
more info
PubMed 
mitochondrion HDA PubMed 
mitochondrion IDA
Inferred from Direct Assay
more info
PubMed 
nucleoplasm IDA
Inferred from Direct Assay
more info
 

General protein information

Preferred Names
cytochrome c oxidase subunit 4 isoform 1, mitochondrial
Names
cytochrome c oxidase polypeptide IV
cytochrome c oxidase subunit IV
NP_001305715.1
NP_001305717.1
NP_001305723.1
NP_001305726.1
NP_001305731.1
NP_001852.1
XP_024305924.1

NCBI Reference Sequences (RefSeq)

RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

Genomic

  1. NG_042280.1 RefSeqGene

    Range
    5129..12488
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_001318786.2NP_001305715.1  cytochrome c oxidase subunit 4 isoform 1, mitochondrial isoform 1 precursor

    Status: REVIEWED

    Description
    Transcript Variant: This variant (2) differs in the 5' UTR, compared to variant 1. Variants 1 and 2 encode the same isoform (1).
    Source sequence(s)
    AC018695, BC047869, BE615615, BE728651, BM835194, BU599266, U90915
    Consensus CDS
    CCDS10955.1
    UniProtKB/Swiss-Prot
    P13073
    UniProtKB/TrEMBL
    Q86WV2
    Related
    ENSP00000457015.1, ENST00000561569.5
    Conserved Domains (1) summary
    pfam02936
    Location:36168
    COX4; Cytochrome c oxidase subunit IV
  2. NM_001318788.2NP_001305717.1  cytochrome c oxidase subunit 4 isoform 1, mitochondrial isoform 2 precursor

    Status: REVIEWED

    Description
    Transcript Variant: This variant (3) uses an alternate splice site in the 3' coding region, resulting in a frameshift and an early stop codon, compared to variant 1. It encodes isoform 2, which has a shorter and distinct C-terminus, compared to isoform 1.
    Source sequence(s)
    BE615615, BP343428, BU599266, U90915
    UniProtKB/Swiss-Prot
    P13073
    Conserved Domains (1) summary
    cd00922
    Location:26126
    Cyt_c_Oxidase_IV; Cytochrome c oxidase subunit IV. Cytochrome c oxidase (CcO), the terminal oxidase in the respiratory chains of eukaryotes and most bacteria, is a multi-chain transmembrane protein located in the inner membrane of mitochondria and the cell membrane of ...
  3. NM_001318794.2NP_001305723.1  cytochrome c oxidase subunit 4 isoform 1, mitochondrial isoform 3 precursor

    Status: REVIEWED

    Description
    Transcript Variant: This variant (4) uses an alternate splice site in the 3' coding region, resulting in a different 3' coding region and 3' UTR, compared to variant 1. It encodes isoform 3, which has a shorter and distinct C-terminus, compared to isoform 1.
    Source sequence(s)
    AC018695, BC062437, BE615615, BG614492, BM835194, BU599266, CN406213
    Consensus CDS
    CCDS82020.1
    UniProtKB/Swiss-Prot
    P13073
    UniProtKB/TrEMBL
    H3BNV9
    Related
    ENSP00000455030.1, ENST00000568794.5
    Conserved Domains (1) summary
    cd00922
    Location:26124
    Cyt_c_Oxidase_IV; Cytochrome c oxidase subunit IV. Cytochrome c oxidase (CcO), the terminal oxidase in the respiratory chains of eukaryotes and most bacteria, is a multi-chain transmembrane protein located in the inner membrane of mitochondria and the cell membrane of ...
  4. NM_001318797.2NP_001305726.1  cytochrome c oxidase subunit 4 isoform 1, mitochondrial isoform 4

    Status: REVIEWED

    Description
    Transcript Variant: This variant (5) differs in the 5' UTR, lacks a portion of the 5' coding region and uses a downstream start codon, compared to variant 1. It encodes isoform 4, which is shorter at the N-terminus, compared to isoform 1.
    Source sequence(s)
    AC018695, BE615615, BE728651, BU599266, DB502762, U90915
    UniProtKB/Swiss-Prot
    P13073
    Related
    ENSP00000455301.1, ENST00000566405.5
    Conserved Domains (1) summary
    pfam02936
    Location:1130
    COX4; Cytochrome c oxidase subunit IV
  5. NM_001318802.2NP_001305731.1  cytochrome c oxidase subunit 4 isoform 1, mitochondrial isoform 5

    Status: REVIEWED

    Description
    Transcript Variant: This variant (6) differs in the 5' and 3' UTRs and 5' and 3' coding regions, compared to variant 1. It encodes isoform 5, which is shorter and has distinct N- and C-termini, compared to isoform 1.
    Source sequence(s)
    BE615615, BM835194, BU599266, CD677397, U90915
    UniProtKB/Swiss-Prot
    P13073
    Conserved Domains (1) summary
    cl02792
    Location:2165
    Cyt_c_Oxidase_IV; Cytochrome c oxidase subunit IV. Cytochrome c oxidase (CcO), the terminal oxidase in the respiratory chains of eukaryotes and most bacteria, is a multi-chain transmembrane protein located in the inner membrane of mitochondria and the cell membrane of ...
  6. NM_001861.6NP_001852.1  cytochrome c oxidase subunit 4 isoform 1, mitochondrial isoform 1 precursor

    See identical proteins and their annotated locations for NP_001852.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1) encodes the longest isoform (1). Variants 1 and 2 encode the same isoform (1).
    Source sequence(s)
    AC018695, BC062437, BE615615, BM835194, BU599266
    Consensus CDS
    CCDS10955.1
    UniProtKB/Swiss-Prot
    P13073
    Related
    ENSP00000253452.2, ENST00000253452.8
    Conserved Domains (1) summary
    pfam02936
    Location:36168
    COX4; Cytochrome c oxidase subunit IV

RefSeqs of Annotated Genomes: Homo sapiens Updated Annotation Release 109.20191205

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCh38.p13 Primary Assembly

Genomic

  1. NC_000016.10 Reference GRCh38.p13 Primary Assembly

    Range
    85799695..85807068
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. XM_024450156.1XP_024305924.1  cytochrome c oxidase subunit 4 isoform 1, mitochondrial isoform X1

    Conserved Domains (1) summary
    pfam02936
    Location:42174
    COX4; Cytochrome c oxidase subunit IV
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