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Janus kinase 2 (commonly called JAK2) is a non-receptor tyrosine kinase.It is a member of the Janus kinase family and has been implicated in signaling by members of the type II cytokine receptor family (e.g. interferon receptors), the GM-CSF receptor family (IL-3R, IL-5R and GM-CSF-R), the gp130 receptor family (e.g., IL-6R), and the single chain receptors (e.g. Epo-R, Tpo-R, GH-R, PRL-R).
TEL-JAK2 is a gene fusion resulting from a chromosomal translocation between chromosomes 9 and 12 observed in human leukemia. [ 1 ] [ 2 ] The 5' moiety of TEL is fused to the 3' end of JAK2 . The oligomerisation domain of the TEL protein (also called ETV6 ) becomes juxtaposed to the tyrosine kinase domain of JAK2, and as result the TEL-JAK2 ...
Janus kinase (JAK) is a family of intracellular, non-receptor tyrosine kinases that transduce cytokine-mediated signals via the JAK-STAT pathway.They were initially named "just another kinase" 1 and 2 (since they were just two of many discoveries in a PCR-based screen of kinases), [1] but were ultimately published as "Janus kinase".
Specifically, mutations in exons 12, 13, 14 and 15 of the JAK2 gene are proposed to be a risk factor in developing lymphoma or leukemia. [6] Additionally, mutated STAT3 and STAT5 can increase JAK-STAT signalling in NK and T cells, which promotes very high proliferation of these cells, and increases the likelihood of developing leukaemia. [66]
Non-receptor tyrosine-protein kinase TYK2 is an enzyme that in humans is encoded by the TYK2 gene. [5] [6] TYK2 was the first member of the JAK family that was described (the other members are JAK1, JAK2, and JAK3). [7] It has been implicated in IFN-α, IL-6, IL-10 and IL-12 signaling.
•List of human protein-coding genes page 2 covers genes EPHA1–MTMR3 •List of human protein-coding genes page 3 covers genes MTMR4–SLC17A7 •List of human protein-coding genes page 4 covers genes SLC17A8–ZZZ3 NB: Each list page contains 5000 human protein-coding genes, sorted alphanumerically by the HGNC-approved gene symbol.
A mutation in the JAK2 kinase (V617F) is strongly associated with polycythemia vera. [18] [19] While it is a JAK2 V617F mutation in 95% of patients, JAK2 exon 12 mutations have also been observed. [20] The V617F mutation is not inherited, but develops as a somatic mutation in the erythroid progenitor cells. [21]
Janus kinase 3 is a tyrosine kinase that belongs to the janus family of kinases. Other members of the Janus family include JAK1, JAK2 and TYK2. Janus kinases (JAKs) are relatively large kinases of approximately 1150 amino acids with apparent molecular weights of 120-130 kDa. [7]