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 NSGNSWGILocalizationUniProt · 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.
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