Seroatlas · Human Serome Atlas

INSM2

Insulinoma-associated protein 2

Also known as: IA-6, INSM2_HUMAN, Mlt1

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

Protein identityUniProt · HPA

UniProt accession
Q96T92
Gene
INSM2
Ensembl
ENSG00000168348
Chromosome
14
Canonical length
566 aa
Protein class
Predicted intracellular proteins, Transcription factors
Subcellular location
Nucleoplasm

OverviewNCBI Gene

Predicted to enable DNA-binding transcription repressor activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Predicted to be involved in negative regulation of transcription by RNA polymerase II; neuron differentiation; and regulation of cell cycle process. Predicted to be located in cytoplasm. Predicted to be part of transcription repressor complex. Predicted to be active in nucleus. [provided by Alliance of Genome Resources, Jul 2025]

Canonical amino-acid sequenceUniProt

566 residues, UniProt reviewed canonical sequence.

>Q96T92|INSM2
     1  MPRGFLVKRT KRTGGLYRVR LAERVFPLLG PQGAPPFLEE APSASLPGAE RATPPTREEP
    61  GKGLTAEAAR EQSGSPCRAA GVSPGTGGRE GAEWRAGGRE GPGPSPSPSP SPAKPAGAEL
   121  RRAFLERCLS SPVSAESFPG GAAAVAAFSC SVAPAAAPTP GEQFLLPLRA PFPEPALQPD
   181  PAPLSAALQS LKRAAGGERR GKAPTDCASG PAAAGIKKPK AMRKLSFADE VTTSPVLGLK
   241  IKEEEPGAPS RGLGGSRTPL GEFICQLCKE QYADPFALAQ HRCSRIVRVE YRCPECDKVF
   301  SCPANLASHR RWHKPRPAAA NAATVSSADG KPPSSSSSSS RDSGAIASFL AEGKENSRIE
   361  RTADQHPQAR DSSGADQHPD SAPRQGLQVL THPEPPLPQG PYTEGVLGRR VPVPGSTSGG
   421  RGSEIFVCPY CHKKFRRQAY LRKHLSTHEA GSARALAPGF GSERGAPLAF ACPLCGAHFP
   481  TADIREKHRL WHAVREELLL PALAGAPPET SGPSGPSDGS AQQIFSCKHC PSTFFSSPGL
   541  TRHINKCHPS ESRQVLLLQM PLRPGC

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against INSM2 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
2.5 nTPM

Expression across tissuesHPA

Tissue

  • retina: 2.5 nTPM
  • hypothalamus: 2 nTPM
  • cerebral cortex: 1.5 nTPM
  • basal ganglia: 1 nTPM
  • midbrain: 0.6 nTPM
  • testis: 0.6 nTPM

Single-cell type

  • early primary spermatocytes: 5.1 nCPM
  • rod photoreceptor cells: 4.2 nCPM
  • cone photoreceptor cells: 4.1 nCPM
  • retinal ganglion cells: 3.9 nCPM
  • other brain neurons: 3 nCPM
  • breast myoepithelial cells: 2.6 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

  • hypothalamus: 8.6 nTPM
  • cerebral cortex: 5.9 nTPM
  • pons: 5.5 nTPM
  • thalamus: 4.5 nTPM
  • basal ganglia: 3.4 nTPM
  • white matter: 3.1 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about INSM2.

Disease | AutoantibodyPubMed

Conditions in which antibodies against INSM2 are reported. Each links to that disease's full target list.

ReferencesPubMed · IEDB

Publications for INSM2 from three distinct lines of evidence, kept separate because they answer different questions: whether antibodies are directed at the protein, whether a B-cell epitope has been mapped on it, and whether a T-cell epitope has. Each is labelled with its source.

Reference: AutoantibodyPubMed

25 publications

Show 20 more

Sources: PubMed — antigen-level antibody evidence from a custom retrieval. Records matching a controlled set of autoantibody terms (the MeSH descriptors Autoantibodies and Autoantigens, with title and abstract term variants) were obtained through NCBI E-utilities, and their titles and abstracts parsed for constructions that direct an antibody at a named protein rather than for co-occurrence. Captured names were resolved against UniProt nomenclature and each antigen adjudicated individually against the source text. Bibliographic records from PubMed and MeSH, U.S. National Library of Medicine; citation metrics from NIH iCite (Hutchins et al., PLoS Biology 2016). Titles link to PubMed; abstracts are not reproduced here. The NLM does not endorse this analysis.

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)
0.42
gnomAD pLI
0.88
gnomAD missense Z
0.78
DepMap mean gene effect
-0.02
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

Antibody and autoantibody relevanceSeroatlas analysis

Seroatlas reads INSM2 as an antibody target. Whether an autoantibody or antibody against INSM2 could matter depends on whether native INSM2 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

INSM2 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 INSM2 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/INSM2. 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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