Aliases for ITK Gene
External Ids for ITK Gene
Previous GeneCards Identifiers for ITK Gene
This gene encodes an intracellular tyrosine kinase expressed in T-cells. The protein contains both SH2 and SH3 domains which are often found in intracellular kinases. It is thought to play a role in T-cell proliferation and differentiation. [provided by RefSeq, Jul 2008]
GeneCards Summary for ITK Gene
ITK (IL2 Inducible T Cell Kinase) is a Protein Coding gene. Diseases associated with ITK include Lymphoproliferative Syndrome 1 and Agammaglobulinemia, X-Linked. Among its related pathways are ICos-ICosL Pathway in T-Helper Cell and T-Cell Receptor and Co-stimulatory Signaling. Gene Ontology (GO) annotations related to this gene include transferase activity, transferring phosphorus-containing groups and protein tyrosine kinase activity. An important paralog of this gene is TEC.
UniProtKB/Swiss-Prot Summary for ITK Gene
Tyrosine kinase that plays an essential role in regulation of the adaptive immune response. Regulates the development, function and differentiation of conventional T-cells and nonconventional NKT-cells. When antigen presenting cells (APC) activate T-cell receptor (TCR), a series of phosphorylation lead to the recruitment of ITK to the cell membrane, in the vicinity of the stimulated TCR receptor, where it is phosphorylated by LCK. Phosphorylation leads to ITK autophosphorylation and full activation. Once activated, phosphorylates PLCG1, leading to the activation of this lipase and subsequent cleavage of its substrates. In turn, the endoplasmic reticulum releases calcium in the cytoplasm and the nuclear activator of activated T-cells (NFAT) translocates into the nucleus to perform its transcriptional duty. Phosphorylates 2 essential adapter proteins: the linker for activation of T-cells/LAT protein and LCP2. Then, a large number of signaling molecules such as VAV1 are recruited and ultimately lead to lymphokine production, T-cell proliferation and differentiation (PubMed:12186560, PubMed:12682224, PubMed:21725281). Phosphorylates TBX21 at 'Tyr-530' and mediates its interaction with GATA3 (By similarity).
ITK (IL-2-inducible T-cell kinase) is a member of the Tec family of nonreceptor tyrosine kinases that are critically important for the growth, differentiation and activation of myeloid-, mast- and B-cells. ITK has a critical role in T-cell growth, signaling and function.