| General information | Literature | Expression | Regulation | Mutation | Interaction |
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Basic Information |
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|---|---|
Gene ID | 5771 |
Name | PTPN2 |
Synonymous | PTN2|PTPT|TC-PTP|TCELLPTP|TCPTP;protein tyrosine phosphatase, non-receptor type 2;PTPN2;protein tyrosine phosphatase, non-receptor type 2 |
Definition | T-cell protein tyrosine phosphatase|tyrosine-protein phosphatase non-receptor type 2 |
Position | 18p11.3-p11.2 |
Gene type | protein-coding |
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Title |
Abstract |
| Deletion of the protein tyrosine phosphatase gene PTPN2 in T-cell acute lymphoblastic leukemia. | PTPN2 (protein tyrosine phosphatase non-receptor type 2, also known as TC-PTP) is a cytosolic tyrosine phosphatase that functions as a negative regulator of a variety of tyrosine kinases and other signaling proteins. In agreement with its role in the regulation of the immune system, PTPN2 was identified as a susceptibility locus for autoimmune diseases. In this work, we describe the identification of focal deletions of PTPN2 in human T-cell acute lymphoblastic leukemia (T-ALL). Deletion of PTPN2 was specifically found in T-ALLs with aberrant expression of the TLX1 transcription factor oncogene, including four cases also expressing the NUP214-ABL1 tyrosine kinase. Knockdown of PTPN2 increased the proliferation and cytokine sensitivity of T-ALL cells. In addition, PTPN2 was identified as a negative regulator of NUP214-ABL1 kinase activity. Our study provides genetic and functional evidence for a tumor suppressor role of PTPN2 and suggests that expression of PTPN2 may modulate response to treatment. |