# PTPN6

Source: https://onco.cc/targets/ptpn6/  
OnCo record `ptpn6` (Target). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

PTPN6 (Tyrosine-protein phosphatase non-receptor type 6) is an enzyme. The public catalogues list it as an oncogene driver, a tumour suppressor and a biomarker, and clinical evidence ties its variants to diagnosis, prognosis or drug response. Tied to Hepatocellular carcinoma, Diffuse large B-cell lymphoma and Melanoma.

## Summary

Tyrosine phosphatase enzyme that plays important roles in controlling immune signalling pathways and fundamental physiological processes such as haematopoiesis. Dephosphorylates and negatively regulate several receptor tyrosine kinases (RTKs) such as EGFR, PDGFR and FGFR, thereby modulating their signalling activities. When recruited to immunoreceptor tyrosine-based inhibitory motif (ITIM)-containing receptors such as immunoglobulin-like transcript 2/LILRB1, programmed cell death protein 1/PDCD1, CD3D, CD22, CLEC12A and other receptors involved in immune regulation, initiates their dephosphorylation and subsequently inhibits downstream signalling events.

CIViC holds 1 clinical evidence item and 0 assertions across 1 variant. IntOGen calls it a driver in 3 cohorts (1 activating, 2 loss-of-function), covering Diffuse Large B-Cell Lymphoma, NOS, Melanoma.

## Fields

- Kind: Target
- Last checked: 2026-09-23
- Also known as: protein tyrosine phosphatase non-receptor type 6; Tyrosine-protein phosphatase non-receptor type 6; PTP-1C; SHP-1; SHP1
- Tags: cancer-genes-wave
- Symbol: PTPN6
- Class: enzyme
- Biology: Tyrosine phosphatase enzyme that plays important roles in controlling immune signalling pathways and fundamental physiological processes such as haematopoiesis. Dephosphorylates and negatively regulate several receptor tyrosine kinases (RTKs) such as EGFR, PDGFR and FGFR, thereby modulating their signalling activities. When recruited to immunoreceptor tyrosine-based inhibitory motif (ITIM)-containing receptors such as immunoglobulin-like transcript 2/LILRB1, programmed cell death protein 1/PDCD1, CD3D, CD22, CLEC12A and other receptors involved in immune regulation, initiates their dephosphorylation and subsequently inhibits downstream signalling events. Modulates the signalling of several cytokine receptors including IL-4 receptor. Additionally, targets multiple cytoplasmic signalling molecules including STING1, LCK or STAT1 among others involved in diverse cellular processes including modulation of T-cell activation or cGAS-STING signalling. Within the nucleus, negatively regulates the activity of some transcription factors such as NFAT5 via direct dephosphorylation. Location: Cytoplasm; Nucleus (UniProt). Locus 12p13.31 (HGNC).
- Where found: Hepatocellular carcinoma: CIViC evidence names this disease; Diffuse large B-cell lymphoma: IntOGen driver in 2 cohorts (DLBCLNOS); Melanoma: IntOGen driver in 1 cohort (MEL)

## 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: IntOGen calls it an activating (Act) driver in 1 cohort; IntOGen calls it a loss-of-function (LoF) driver in 2 cohorts; CIViC holds 1 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:9658: https://www.genenames.org/data/gene-symbol-report/#!/hgnc_id/HGNC:9658
- UniProt P29350: https://www.uniprot.org/uniprotkb/P29350/entry
- NCBI Gene 5777: https://www.ncbi.nlm.nih.gov/gene/5777
- Ensembl ENSG00000111679: https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000111679

## Connected records

- collections: [CIViC](https://onco.cc/collections/civic/), [IntOGen](https://onco.cc/collections/intogen/)
- cancers: [Diffuse large B-cell lymphoma](https://onco.cc/cancers/dlbcl/), [Hepatocellular carcinoma](https://onco.cc/cancers/hcc/), [Melanoma](https://onco.cc/cancers/melanoma/)
- pathways: [CD47 / SIRPα (the 'don't eat me' signal)](https://onco.cc/pathways/cd47-sirpa/)

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JSON: https://onco.cc/api/v1/entities/ptpn6.json