Seroatlas · Human Serome Atlas

HOXD9

Homeobox protein Hox-D9

Also known as: HOX4, HOX4C, HXD9_HUMAN

Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene

Protein identityUniProt · HPA

UniProt accession
P28356
Gene
HOXD9
Ensembl
ENSG00000128709
Chromosome
2
Canonical length
352 aa
Protein class
Predicted intracellular proteins, Transcription factors
Subcellular location
Nucleoplasm,Nucleoli

OverviewNCBI Gene

This gene belongs to the homeobox family of genes. The homeobox genes encode a highly conserved family of transcription factors that play an important role in morphogenesis in all multicellular organisms. Mammals possess four similar homeobox gene clusters, HOXA, HOXB, HOXC and HOXD, located on different chromosomes, consisting of 9 to 11 genes arranged in tandem. This gene is one of several homeobox HOXD genes located at 2q31-2q37 chromosome regions. Deletions that removed the entire HOXD gene cluster or 5' end of this cluster have been associated with severe limb and genital abnormalities. The exact role of this gene has not been determined. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

352 residues, UniProt reviewed canonical sequence.

>P28356|HOXD9
     1  MLGGSAGRLK MSSSGTLSNY YVDSLIGHEG DEVFAARFGP PGPGAQGRPA GVADGPAATA
    61  AEFASCSFAP RSAVFSASWS AVPSQPPAAA AMSGLYHPYV PPPPLAASAS EPGRYVRSWM
   121  EPLPGFPGGA GGGGGGGGGG PGRGPSPGPS GPANGRHYGI KPETRAAPAP ATAASTTSSS
   181  STSLSSSSKR TECSVARESQ GSSGPEFSCN SFLQEKAAAA TGGTGPGAGI GAATGTGGSS
   241  EPSACSDHPI PGCSLKEEEK QHSQPQQQQL DPNNPAANWI HARSTRKKRC PYTKYQTLEL
   301  EKEFLFNMYL TRDRRYEVAR ILNLTERQVK IWFQNRRMKM KKMSKEKCPK GD

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against HOXD9 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)
0.68
Highest tissue expression
59 nTPM

Expression across tissuesHPA

Tissue

  • endometrium: 59 nTPM
  • kidney: 49 nTPM
  • cervix: 41 nTPM
  • vagina: 34 nTPM
  • prostate: 31 nTPM
  • colon: 29 nTPM

Single-cell type

  • distal convoluted tubule cells: 49 nCPM
  • renal connecting tubule cells: 47 nCPM
  • lymphatic endothelial cells: 44 nCPM
  • epididymal principal cells: 40 nCPM
  • vascular endothelial cells: 30 nCPM
  • renal collecting duct principal cells: 28 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

  • white matter: 1.6 nTPM
  • spinal cord: 1.2 nTPM
  • medulla oblongata: 1.1 nTPM
  • thalamus: 0.2 nTPM
  • amygdala: 0.1 nTPM
  • cerebellum: 0.1 nTPM

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)
1.07
gnomAD pLI
0.02
gnomAD missense Z
0.58
DepMap mean gene effect
-0.06
DepMap dependency class
selective

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 5% 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 HOXD9 as an antibody target. Whether an autoantibody or antibody against HOXD9 could matter depends on whether native HOXD9 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

HOXD9 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 HOXD9 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/HOXD9. 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).

Loading the interactive Seroatlas protein explorer...