PTPN6 dephosphorylates JAK3

Stable Identifier
Reaction [transition]
Homo sapiens
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PTPN6, also known as SHP1, dephosphorylates JAK3 downstream of ALK signaling, leading to the inactivation and increased proteolytic degradation of JAK3 (Han et al, 2006 a, b; reviewed in Palmer et al, 2009; Chiarle et al, 2008). PTPN6 gene expression is lost in some cases of anaplastic large cell lymphoma (ALCL) due to changes in promoter methylation, resulting in increased JAK3 activity in these cancers (Khoury et al, 2004; reviewed in Chiarle et al, 2008; Palmer et al, 2009).

Literature References
PubMed ID Title Journal Year
19459784 Anaplastic lymphoma kinase: signalling in development and disease

Grabbe, C, Vernersson, E, Palmer, RH, Hallberg, B

Biochem. J. 2009
15317731 Methylation of SHP1 gene and loss of SHP1 protein expression are frequent in systemic anaplastic large cell lymphoma

Khoury, JD, Amin, HM, Rassidakis, GZ, Medeiros, LJ, Lai, R

Blood 2004
18097461 The anaplastic lymphoma kinase in the pathogenesis of cancer

Chiarle, R, Piva, R, Ambrogio, C, Inghirami, G, Voena, C

Nat. Rev. Cancer 2008
16825495 Loss of SHP1 enhances JAK3/STAT3 signaling and decreases proteosome degradation of JAK3 and NPM-ALK in ALK+ anaplastic large-cell lymphoma

Frantz, C, Amin, HM, Franko, B, Han, Y, Lai, R, Shi, X

Blood 2006
16871283 Restoration of shp1 expression by 5-AZA-2'-deoxycytidine is associated with downregulation of JAK3/STAT3 signaling in ALK-positive anaplastic large cell lymphoma

Amin, HM, Franko, B, Frantz, C, Han, Y, Lai, R, Lin, Q, Lee, J

Leukemia 2006
Catalyst Activity

protein tyrosine phosphatase activity of PTPN6 [cytosol]

Orthologous Events
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