Seroatlas · Human Serome Atlas

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  SDI

LocalizationUniProt · 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.

Disease | GeneticClinVar

4 pathogenic / likely-pathogenic of 143 ClinVar records.

Conditions with pathogenic or likely-pathogenic variants.

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

Molecular functions

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.

Canonical record: https://seroatlas.com/gene/IRX5. Study-independent annotations aggregated from UniProt, Human Protein Atlas, PubMed, IEDB, Pfam, InterPro, Gene Ontology, AlphaFold, gnomAD, DepMap, ClinVar, TCGA. Catalog release seroatlas-reviewed-human-uniprot-20260313.

Seroatlas is the reference for exploring autoantibody and antibody serology at the human-protein level: the autoreactome and human serome, multiplex serology (HuProt, HuScan, VirScan, PhIP-Seq).

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