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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".
The kinase domain is vital for JAK activity, since it allows JAKs to phosphorylate (add phosphate groups to) proteins. There are seven STAT proteins: STAT1, STAT2, STAT3, STAT4, STAT5A, STAT5B and STAT6. [1] STAT proteins contain many different domains, each with a different function, of which the most conserved region is the SH2 domain. [2]
16453 Ensembl ENSG00000105639 ENSMUSG00000031805 UniProt P52333 Q62137 RefSeq (mRNA) NM_000215 NM_001190830 NM_010589 RefSeq (protein) NP_000206 NP_001177759 NP_034719 Location (UCSC) Chr 19: 17.82 – 17.85 Mb Chr 8: 72.13 – 72.14 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Tyrosine-protein kinase JAK3 is a tyrosine kinase enzyme that in humans is encoded by the JAK3 gene ...
A Janus kinase inhibitor, also known as JAK inhibitor or jakinib, [1] is a type of immune modulating medication, which inhibits the activity of one or more of the Janus kinase family of enzymes (JAK1, JAK2, JAK3, TYK2), thereby interfering with the JAK-STAT signaling pathway in lymphocytes.
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).
Differences in interactions with protein substrates arise because of the mutually exclusive utilization of two exons within the kinase domain. [1] c-Jun N-terminal kinase isoforms have the following tissue distribution: JNK1 and JNK2 are found in all cells and tissues. [3] JNK3 is found mainly in the brain, but is also found in the heart and ...
JAK1 is a human tyrosine kinase protein essential for signaling for certain type I and type II cytokines.It interacts with the common gamma chain (γc) of type I cytokine receptors, to elicit signals from the IL-2 receptor family (e.g. IL-2R, IL-7R, IL-9R and IL-15R), the IL-4 receptor family (e.g. IL-4R and IL-13R), the gp130 receptor family (e.g. IL-6R, IL-11R, LIF-R, OSM-R, cardiotrophin-1 ...
Janus kinase 3 inhibitors work by inhibiting the action of the enzyme Janus kinase 3, thereby interfering with the JAK-STAT signaling pathway.JAK3 is required for signaling by cytokines through the common γ chain of the interleukin receptors for IL-2, IL-4, IL-7, IL-9, IL-15, and IL-21. [4]