IRX5
Iroquois-class homeodomain protein IRX-5
Also known as: IRX-2a, IRX5_HUMAN
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- P78411
- Gene
- IRX5
- Ensembl
- ENSG00000176842
- Chromosome
- 16
- Canonical length
- 483 aa
- Protein class
- Disease related genes, Human disease related genes, Predicted intracellular proteins, Transcription factors
- Subcellular location
- Nuclear speckles,Microtubules,Cytosol
OverviewNCBI Gene
This gene encodes a member of the iroquois homeobox gene family, which are involved in several embryonic developmental processes. Knockout mice lacking this gene show that it is required for retinal cone bipolar cell differentiation, and that it negatively regulates potassium channel gene expression in the heart to ensure coordinated cardiac repolarization. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2011]
Canonical amino-acid sequenceUniProt
483 residues, UniProt reviewed canonical sequence.
>P78411|IRX5
1 MSYPQGYLYQ PSASLALYSC PAYSTSVISG PRTDELGRSS SGSAFSPYAG STAFTAPSPG
61 YNSHLQYGAD PAAAAAAAFS SYVGSPYDHT PGMAGSLGYH PYAAPLGSYP YGDPAYRKNA
121 TRDATATLKA WLNEHRKNPY PTKGEKIMLA IITKMTLTQV STWFANARRR LKKENKMTWT
181 PRNRSEDEEE EENIDLEKND EDEPQKPEDK GDPEGPEAGG AEQKAASGCE RLQGPPTPAG
241 KETEGSLSDS DFKEPPSEGR LDALQGPPRT GGPSPAGPAA ARLAEDPAPH YPAGAPAPGP
301 HPAAGEVPPG PGGPSVIHSP PPPPPPAVLA KPKLWSLAEI ATSSDKVKDG GGGNEGSPCP
361 PCPGPIAGQA LGGSRASPAP APSRSPSAQC PFPGGTVLSR PLYYTAPFYP GYTNYGSFGH
421 LHGHPGPGPG PTTGPGSHFN GLNQTVLNRA DALAKDPKML RSQSQLDLCK DSPYELKKGM
481 SDILocalizationUniProt · AlphaFold · HPA
Whether an antibody against IRX5 can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.
- Antibody reachability
- Intracellular
- Secreted
- No
- Transmembrane segments
- 0
- Mean surface accessibility (rSASA)
- 0.69
- Highest tissue expression
- 16 nTPM
Expression across tissuesHPA
Tissue
- skin: 16 nTPM
- breast: 13 nTPM
- salivary gland: 9.6 nTPM
- heart muscle: 9.4 nTPM
- esophagus: 6.9 nTPM
- kidney: 6.3 nTPM
Single-cell type
- breast myoepithelial cells: 92 nCPM
- breast lactating cells: 90 nCPM
- breast hormone-responsive cells: 50 nCPM
- müller glia: 47 nCPM
- basal prostatic cells: 45 nCPM
- alveolar cells type 2: 39 nCPM
Immune cell
- basophil: 0 nTPM
- classical monocyte: 0 nTPM
- eosinophil: 0 nTPM
- gdT-cell: 0 nTPM
- intermediate monocyte: 0 nTPM
- MAIT T-cell: 0 nTPM
Brain region
- thalamus: 10 nTPM
- midbrain: 8.9 nTPM
- cerebellum: 8.7 nTPM
- medulla oblongata: 7.7 nTPM
- spinal cord: 7.7 nTPM
- white matter: 7.3 nTPM
DiseaseUniProt · ClinVar · IEDB · PubMed
Four sources answering four different questions about IRX5.
Disease | AllUniProt
Conditions IRX5 is implicated in, by any mechanism.
- Hamamy syndrome (HMMS) MIM:611174
Disease | GeneticClinVar
4 pathogenic / likely-pathogenic of 143 ClinVar records.
Conditions with pathogenic or likely-pathogenic variants.
- Craniofacial dysplasia - osteopenia syndrome
Genetic constraint and essentialitygnomAD · DepMap
Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.
- gnomAD LOEUF (loss-of-function intolerance)
- 0.3
- gnomAD pLI
- 0.97
- gnomAD missense Z
- 0.83
- DepMap mean gene effect
- 0.02
- DepMap dependency class
- selective
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
- cell development
- embryonic cranial skeleton morphogenesis
- gonad development
- neuron differentiation
- neuron maturation
- regulation of heart rate
- regulation of transcription by RNA polymerase II
- retinal bipolar neuron differentiation
- visual perception
Molecular functions
- DNA-binding transcription factor activity, RNA polymerase II-specific
- DNA-binding transcription factor binding
- identical protein binding
- RNA polymerase II cis-regulatory region sequence-specific DNA binding
- sequence-specific double-stranded DNA binding
- vitamin D binding
Cellular components
Protein domainsUniProt · Pfam · InterPro
KeywordsUniProt
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads IRX5 as an antibody target. Whether an autoantibody or antibody against IRX5 could matter depends on whether native IRX5 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
IRX5 is annotated as predominantly intracellular. Intracellular proteins are common autoantibody markers, becoming visible to the immune system after cell injury or altered processing, but are usually markers of disease rather than direct drivers.
Annotation status
The present source text does not explicitly label IRX5 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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