# PTPRB

Source: https://onco.cc/targets/ptprb/  
OnCo record `ptprb` (Target). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

PTPRB (Receptor-type tyrosine-protein phosphatase beta) is an enzyme. The public catalogues list it as a drug target, an oncogene driver, a tumour suppressor and a biomarker, and clinical evidence ties its variants to diagnosis, prognosis or drug response. Tied to Ovarian cancer, Mesothelioma, Skin cancer and 5 more.

## Summary

Plays an important role in blood vessel remodeling and angiogenesis. Not necessary for the initial formation of blood vessels, but is essential for their maintenance and remodeling. Can induce dephosphorylation of TEK/TIE2, CDH5/VE-cadherin and KDR/VEGFR-2.

CIViC holds 4 clinical evidence items and 0 assertions across 3 variants, naming Sunitinib and Vatalanib. Open Targets scores its association with cancer at 0.71 (direct and indirect evidence; datatypes literature 0.80, genetic association 0.03, somatic mutation 0.92). IntOGen calls it a driver in 6 cohorts (1 activating, 5 loss-of-function), covering Angiosarcoma, Melanoma, Ovarian Epithelial Tumour, Pleural Mesothelioma, Thymoma.

## Fields

- Kind: Target
- Last checked: 2026-09-23
- Also known as: protein tyrosine phosphatase receptor type B; Receptor-type tyrosine-protein phosphatase beta
- Tags: cancer-genes-wave
- Symbol: PTPRB
- Class: enzyme
- Biology: Plays an important role in blood vessel remodeling and angiogenesis. Not necessary for the initial formation of blood vessels, but is essential for their maintenance and remodeling. Can induce dephosphorylation of TEK/TIE2, CDH5/VE-cadherin and KDR/VEGFR-2. Regulates angiopoietin-TIE2 signalling in endothelial cells. Acts as a negative regulator of TIE2, and controls TIE2 driven endothelial cell proliferation, which in turn affects blood vessel remodeling during embryonic development and determines blood vessel size during perinatal growth. Essential for the maintenance of endothelial cell contact integrity and for the adhesive function of VE-cadherin in endothelial cells and this requires the presence of plakoglobin. Location: Membrane (UniProt). Locus 12q15 (HGNC).
- Where found: Ovarian cancer: IntOGen driver in 2 cohorts (OVT); Mesothelioma: IntOGen driver in 1 cohort (PLMESO); Skin cancer: Open Targets association 0.57 with skin cancer (MONDO_0002898); Lung cancer: Open Targets association 0.53 with lung cancer (MONDO_0008903); Sarcomas: Open Targets association 0.52 with sarcoma (MONDO_0005089); Breast cancer: Open Targets association 0.52 with breast cancer (MONDO_0007254)

## Notes

- Written by scripts/fetch-cancer-genes.ts from CIViC, Open Targets, IntOGen, HGNC and UniProt; the function text is UniProt's, condensed and in UK spelling. Roles: CIViC lists 2 therapies; IntOGen calls it an activating (Act) driver in 1 cohort; IntOGen calls it a loss-of-function (LoF) driver in 5 cohorts; CIViC holds 4 clinical evidence items on its variants. Evidence tier "clinical-evidence" is the strongest of those signals.
- Prevalence not recorded: none of the sources gives a positivity rate.

## Sources

- HGNC HGNC:9665: https://www.genenames.org/data/gene-symbol-report/#!/hgnc_id/HGNC:9665
- UniProt P23467: https://www.uniprot.org/uniprotkb/P23467/entry
- NCBI Gene 5787: https://www.ncbi.nlm.nih.gov/gene/5787
- Ensembl ENSG00000127329: https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000127329

## Connected records

- collections: [CIViC](https://onco.cc/collections/civic/), [IntOGen](https://onco.cc/collections/intogen/), [Open Targets Platform](https://onco.cc/collections/open-targets/)
- cancers: [Angiosarcoma](https://onco.cc/cancers/angiosarcoma/), [Breast cancer (all types)](https://onco.cc/cancers/breast-cancer/), [Lung cancer (all types)](https://onco.cc/cancers/lung-cancer/), [Melanoma](https://onco.cc/cancers/melanoma/), [Mesothelioma](https://onco.cc/cancers/mesothelioma/), [Ovarian cancer](https://onco.cc/cancers/ovarian/), [Sarcomas (soft tissue, bone, GIST)](https://onco.cc/cancers/sarcoma/), [Skin cancer (all types)](https://onco.cc/cancers/skin-cancer/)

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JSON: https://onco.cc/api/v1/entities/ptprb.json