title: Jak2: normal function and role in hematopoietic disorders.
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.
authors.affiliation: Department of Biochemistry, St Jude Children's Research Hospital, Memphis, TN 38105, USA. james.ihle@stjude.org
authors.forename: James N
authors.initials: JN
authors.lastname: Ihle
authors.forename: D Gary
authors.initials: DG
authors.lastname: Gilliland
mesh_terms: D015972:Gene Expression Regulation, Neoplastic; D019337:Hematologic Neoplasms / Q000235:genetics*; D006801:Humans; D053614:Janus Kinase 2 / Q000378:metabolism*; D008958:Models, Molecular; D009154:Mutation / Q000235:genetics; D009196:Myeloproliferative Disorders / Q000235:genetics*; D010766:Phosphorylation; D017434:Protein Structure, Tertiary; D018121:Receptors, Cytokine / Q000378:metabolism; D015398:Signal Transduction / Q000235:genetics / Q000502:physiology*; D014178:Translocation, Genetic / Q000235:genetics*; D014443:Tyrosine / Q000378:metabolism
chemical_list: D018121:Receptors, Cytokine; D014443:Tyrosine; C507924:JAK2 protein, human; D053614:Janus Kinase 2