Seroatlas · Human Serome Atlas

CDX1

Homeobox protein CDX-1

Also known as: CDX1_HUMAN

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

Protein identityUniProt · HPA

UniProt accession
P47902
Gene
CDX1
Ensembl
ENSG00000113722
Chromosome
5
Canonical length
265 aa
Protein class
Predicted intracellular proteins, Transcription factors

OverviewNCBI Gene

This gene is a member of the caudal-related homeobox transcription factor gene family. The encoded DNA-binding protein regulates intestine-specific gene expression and enterocyte differentiation. It has been shown to induce expression of the intestinal alkaline phosphatase gene, and inhibit beta-catenin/T-cell factor transcriptional activity. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

265 residues, UniProt reviewed canonical sequence.

>P47902|CDX1
     1  MYVGYVLDKD SPVYPGPARP ASLGLGPQAY GPPAPPPAPP QYPDFSSYSH VEPAPAPPTA
    61  WGAPFPAPKD DWAAAYGPGP AAPAASPASL AFGPPPDFSP VPAPPGPGPG LLAQPLGGPG
   121  TPSSPGAQRP TPYEWMRRSV AAGGGGGSGK TRTKDKYRVV YTDHQRLELE KEFHYSRYIT
   181  IRRKSELAAN LGLTERQVKI WFQNRRAKER KVNKKKQQQQ QPPQPPMAHD ITATPAGPSL
   241  GGLCPSNTSL LATSSPMPVK EEFLP

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against CDX1 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)
0.66
Highest tissue expression
93 nTPM

Expression across tissuesHPA

Tissue

  • colon: 93 nTPM
  • rectum: 83 nTPM
  • small intestine: 67 nTPM
  • duodenum: 45 nTPM
  • appendix: 6.7 nTPM
  • smooth muscle: 3.5 nTPM

Single-cell type

  • colonocytes: 352 nCPM
  • enteric transient amplifying cells: 284 nCPM
  • enteric stem cells: 264 nCPM
  • enterocytes: 176 nCPM
  • paneth cells: 166 nCPM
  • goblet cells: 156 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

  • cerebral cortex: 0.2 nTPM
  • amygdala: 0.1 nTPM
  • choroid plexus: 0.1 nTPM
  • hippocampal formation: 0.1 nTPM
  • thalamus: 0.1 nTPM
  • white matter: 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)
1.08
gnomAD pLI
0.14
gnomAD missense Z
0.06
DepMap mean gene effect
0.08
DepMap dependency class
selective

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 3% 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

InteractionsUniProt · HPA

Protein binding partners of CDX1 in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.

Antibody and autoantibody relevanceSeroatlas analysis

Seroatlas reads CDX1 as an antibody target. Whether an autoantibody or antibody against CDX1 could matter depends on whether native CDX1 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

CDX1 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 CDX1 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/CDX1. 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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