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Curr Opin Genet Dev. 2007 Feb;17(1):8-14. Epub 2007 Jan 8.

Jak2: normal function and role in hematopoietic disorders.

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  • 1Department of Biochemistry, St Jude Children's Research Hospital, Memphis, TN 38105, USA. james.ihle@stjude.org

Abstract

Janus kinase 2 (Jak2) associates with cytokine receptors and is essential for signal transduction by mediating tyrosine phosphorylation. Kinase activity is regulated by a series of interactions beginning with the requirement to bind to specific domains in receptors, suppression of activation by the pseudokinase domain, and the requirement for phosphorylation within the activation loop. Recent studies have implicated de-regulation of Jak2 kinase activity by chromosomal translocations in hematopoietic tumors and mutations within the pseudokinase domain in a spectrum of myeloproliferative diseases.

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