Seroatlas · Human Serome Atlas

MNX1

Motor neuron and pancreas homeobox protein 1

Also known as: HB9, HLXB9, HOXHB9, MNX1_HUMAN, SCRA1

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

Protein identityUniProt · HPA

UniProt accession
P50219
Gene
MNX1
Ensembl
ENSG00000130675
Chromosome
7
Canonical length
401 aa
Protein class
Disease related genes, Human disease related genes, Plasma proteins, Predicted intracellular proteins, Transcription factors
Subcellular location
Nucleoplasm,Nucleoli,Cytosol

OverviewNCBI Gene

This gene encodes a nuclear protein, which contains a homeobox domain and is a transcription factor. Mutations in this gene result in Currarino syndrome, an autosomic dominant congenital malformation. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2009]

Canonical amino-acid sequenceUniProt

401 residues, UniProt reviewed canonical sequence.

>P50219|MNX1
     1  MEKSKNFRID ALLAVDPPRA ASAQSAPLAL VTSLAAAASG TGGGGGGGGA SGGTSGSCSP
    61  ASSEPPAAPA DRLRAESPSP PRLLAAHCAL LPKPGFLGAG GGGGGTGGGH GGPHHHAHPG
   121  AAAAAAAAAA AAAAGGLALG LHPGGAQGGA GLPAQAALYG HPVYGYSAAA AAAALAGQHP
   181  ALSYSYPQVQ GAHPAHPADP IKLGAGTFQL DQWLRASTAG MILPKMPDFN SQAQSNLLGK
   241  CRRPRTAFTS QQLLELEHQF KLNKYLSRPK RFEVATSLML TETQVKIWFQ NRRMKWKRSK
   301  KAKEQAAQEA EKQKGGGGGA GKGGAEEPGA EELLGPPAPG DKGSGRRLRD LRDSDPEEDE
   361  DEDDEDHFPY SNGASVHAAS SDCSSEDDSP PPRPSHQPAP Q

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against MNX1 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
15 nTPM

Expression across tissuesHPA

Tissue

  • pancreas: 15 nTPM
  • duodenum: 6.8 nTPM
  • small intestine: 5.7 nTPM
  • colon: 3.5 nTPM
  • rectum: 2.8 nTPM
  • pituitary gland: 2.5 nTPM

Single-cell type

  • corticotrophs: 86 nCPM
  • pancreatic duct cells: 77 nCPM
  • pancreatic islet cells: 54 nCPM
  • neuroendocrine cells: 46 nCPM
  • paneth cells: 43 nCPM
  • goblet cells: 40 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

  • medulla oblongata: 3.2 nTPM
  • white matter: 2.9 nTPM
  • spinal cord: 2.1 nTPM
  • pons: 2 nTPM
  • cerebral cortex: 1.7 nTPM
  • amygdala: 1.6 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about MNX1.

Disease | AllUniProt

Conditions MNX1 is implicated in, by any mechanism.

Disease | GeneticClinVar

51 pathogenic / likely-pathogenic of 497 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)
0.5
gnomAD pLI
0.79
gnomAD missense Z
0.73
DepMap mean gene effect
0
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 MNX1 as an antibody target. Whether an autoantibody or antibody against MNX1 could matter depends on whether native MNX1 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

MNX1 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 MNX1 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/MNX1. 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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