Calcium-independent, phospholipid- and diacylglycerol (DAG)-dependent serine/threonine-protein kinase that mediates non-redundant functions in T-cell receptor (TCR) signaling, including T-cells activation, proliferation, differentiation and survival, by mediating activation of multiple transcription factors such as NF-kappa-B, JUN, NFATC1 and NFATC2. In TCR-CD3/CD28-co-stimulated T-cells, is required for the activation of NF-kappa-B and JUN, which in turn are essential for IL2 production, and participates in the calcium-dependent NFATC1 and NFATC2 transactivation. Mediates the activation of the canonical NF-kappa-B pathway (NFKB1) by direct phosphorylation of CARD11 on several serine residues, inducing CARD11 association with lipid rafts and recruitment of the BCL10-MALT1 complex, which then activates IKK complex, resulting in nuclear translocation and activation of NFKB1. May also play an indirect role in activation of the non-canonical NF-kappa-B (NFKB2) pathway. In the signaling pathway leading to JUN activation, acts by phosphorylating the mediator STK39/SPAK and may not act through MAP kinases signaling. Plays a critical role in TCR/CD28-induced NFATC1 and NFATC2 transactivation by participating in the regulation of reduced inositol 1,4,5-trisphosphate generation and intracellular calcium mobilization. After costimulation of T-cells through CD28 can phosphorylate CBLB and is required for the ubiquitination and subsequent degradation of CBLB, which is a prerequisite for the activation of TCR. During T-cells differentiation, plays an important role in the development of T-helper 2 (Th2) cells following immune and inflammatory responses, and, in the development of inflammatory autoimmune diseases, is necessary for the activation of IL17-producing Th17 cells. May play a minor role in Th1 response. Upon TCR stimulation, mediates T-cell protective survival signal by phosphorylating BAD, thus protecting T-cells from BAD-induced apoptosis, and by up-regulating BCL-X(L)/BCL2L1 levels through NF-kappa-B and JUN pathways. In platelets, regulates signal transduction downstream of the ITGA2B, CD36/GP4, F2R/PAR1 and F2RL3/PAR4 receptors, playing a positive role in 'outside-in' signaling and granule secretion signal transduction. May relay signals from the activated ITGA2B receptor by regulating the uncoupling of WASP and WIPF1, thereby permitting the regulation of actin filament nucleation and branching activity of the Arp2/3 complex. May mediate inhibitory effects of free fatty acids on insulin signaling by phosphorylating IRS1, which in turn blocks IRS1 tyrosine phosphorylation and downstream activation of the PI3K/AKT pathway. Phosphorylates MSN (moesin) in the presence of phosphatidylglycerol or phosphatidylinositol. Phosphorylates PDPK1 at 'Ser-504' and 'Ser-532' and negatively regulates its ability to phosphorylate PKB/AKT1. Belongs to the protein kinase superfamily. AGC Ser/Thr protein kinase family. PKC subfamily. Expressed in skeletal muscle, T-cells, megakaryoblastic cells and platelets. 3 alternatively spliced human isoforms have been reported. Note: This description may include information from UniProtKB.
Protein type: AGC group; Delta subfamily; EC 184.108.40.206; Kinase, protein; PKC family; Protein kinase, AGC; Protein kinase, Ser/Thr (non-receptor)
Molecular Function: ATP binding; metal ion binding; protein binding; protein kinase activity; protein kinase C activity; protein serine/threonine kinase activity
Biological Process: axon guidance; cell chemotaxis; Fc-epsilon receptor signaling pathway; inflammatory response; intracellular signal transduction; membrane protein ectodomain proteolysis; negative regulation of insulin receptor signaling pathway; negative regulation of T cell apoptotic process; platelet activation; positive regulation of interleukin-17 production; positive regulation of interleukin-2 biosynthetic process; positive regulation of interleukin-4 production; positive regulation of NF-kappaB transcription factor activity; positive regulation of T cell activation; positive regulation of T cell proliferation; positive regulation of T-helper 17 type immune response; positive regulation of T-helper 2 cell activation; positive regulation of telomerase activity; positive regulation of telomere capping; positive regulation of telomere maintenance via telomerase; regulation of cell growth; regulation of megakaryocyte differentiation; regulation of platelet aggregation; regulation of transcription, DNA-templated; T cell receptor signaling pathway