Seroatlas · Human Serome Atlas

EPSTI1

Epithelial-stromal interaction protein 1

Also known as: BRESI1, ESIP1_HUMAN, MGC29634

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

Protein identityUniProt · HPA

UniProt accession
Q96J88
Gene
EPSTI1
Ensembl
ENSG00000133106
Chromosome
13
Canonical length
318 aa
Protein class
Predicted intracellular proteins, Predicted membrane proteins

OverviewNCBI Gene

The protein encoded by this gene has been shown to promote tumor invasion and metastasis in some invasive cancer cells when overexpressed. Expression of this gene has been shown to be upregulated by direct binding of the Kruppel like factor 8 protein to promoter sequences. The translated protein interacts with the amino terminal region of the valosin containing protein gene product, resulting in the nuclear translocation of the nuclear factor kappa B subunit 1 gene product, and activation of target genes. Overexpression of this gene has been observed in some breast cancers and in some individuals with systemic lupus erythematosus (SLE). [provided by RefSeq, Sep 2016]

Canonical amino-acid sequenceUniProt

318 residues, UniProt reviewed canonical sequence.

>Q96J88|EPSTI1
     1  MNTRNRVVNS GLGASPASRP TRDPQDPSGR QGELSPVEDQ REGLEAAPKG PSRESVVHAG
    61  QRRTSAYTLI APNINRRNEI QRIAEQELAN LEKWKEQNRA KPVHLVPRRL GGSQSETEVR
   121  QKQQLQLMQS KYKQKLKREE SVRIKKEAEE AELQKMKAIQ REKSNKLEEK KRLQENLRRE
   181  AFREHQQYKT AEFLSKLNTE SPDRSACQSA VCGPQSSTWK LPILPRDHSW ARSWAYRDSL
   241  KAEENRKLQK MKDEQHQKSE LLELKRQQQE QERAKIHQTE HRRVNNAFLD RLQGKSQPGG
   301  LEQSGGCWNM NSGNSWGI

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against EPSTI1 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
Unknown
Secreted
No
Transmembrane segments
0
Mean surface accessibility (rSASA)
0.59
Highest tissue expression
32 nTPM

Expression across tissuesHPA

Tissue

  • lymph node: 32 nTPM
  • bone marrow: 32 nTPM
  • duodenum: 32 nTPM
  • small intestine: 30 nTPM
  • appendix: 30 nTPM
  • spleen: 30 nTPM

Single-cell type

  • extravillous trophoblasts: 292 nCPM
  • microglia: 171 nCPM
  • enterocytes: 167 nCPM
  • megakaryocyte-erythroid progenitors: 148 nCPM
  • oocytes: 143 nCPM
  • macrophages: 133 nCPM

Immune cell

  • intermediate monocyte: 59 nTPM
  • T-reg: 59 nTPM
  • basophil: 53 nTPM
  • non-classical monocyte: 40 nTPM
  • classical monocyte: 35 nTPM
  • myeloid DC: 31 nTPM

Brain region

  • medulla oblongata: 14 nTPM
  • spinal cord: 8.4 nTPM
  • pons: 8 nTPM
  • white matter: 6.5 nTPM
  • thalamus: 6.3 nTPM
  • basal ganglia: 5.4 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)
1.72
gnomAD pLI
0
gnomAD missense Z
-0.43
DepMap mean gene effect
-0.14
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).

Protein domainsUniProt · Pfam · InterPro

  • Epithelial-stromal interaction protein 1

KeywordsUniProt

Antibody and autoantibody relevanceSeroatlas analysis

Seroatlas reads EPSTI1 as an antibody target. Whether an autoantibody or antibody against EPSTI1 could matter depends on whether native EPSTI1 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

EPSTI1 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 EPSTI1 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/EPSTI1. 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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