Summary

Name PRKCQ
Full Name Protein kinase C theta type
Synonyms nPKC-theta | PRKCT
Primary ID Q04759
Links - -
Type protein
Relations 34
Function 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. Phosphorylates CCDC88A/GIV and inhibits its guanine nucleotide exchange factor activity (PubMed:23509302).

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Modifications Tables

Relations

Regulator Mechanism target score
+ down-regulates activity img/direct_inhibition.png phosphorylation IRS1 0.549
Publications: 1 Organism: Mus Musculus
+ up-regulates activity img/direct-activation.png phosphorylation ARHGEF6 0.2
Publications: 2
+ up-regulates activity img/direct-activation.png phosphorylation PTPN7 0.2
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png phosphorylation STK39 0.458
Publications: 2 Organism: In Vitro
+ up-regulates activity img/direct-activation.png phosphorylation WIPF1 0.328
Publications: 1 Organism: In Vitro
+ up-regulates activity img/direct-activation.png phosphorylation ICAM3 0.339
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png phosphorylation CARD11 0.768
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png phosphorylation TBK1 0.2
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png phosphorylation GRM5 0.294
Publications: 2 Organism: In Vitro
+ down-regulates activity img/direct_inhibition.png phosphorylation CARD11 0.768
Publications: 1 Organism: In Vitro
+ up-regulates img/direct-activation.png phosphorylation RAPGEF2 0.2
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation RASGRP3 0.333
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png phosphorylation FOSL1 0.2
Publications: 2 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png phosphorylation PRKCQ 0.2
Publications: 1 Organism: Homo Sapiens
+ down-regulates activity img/direct_inhibition.png phosphorylation HABP4 0.306
Publications: 2 Organism: Homo Sapiens
+ down-regulates activity img/direct_inhibition.png phosphorylation NOS3 0.2
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation PRKCQ 0.388
Publications: 1 Organism: Homo Sapiens
+ img/unknown.png phosphorylation MSN 0.463
Publications: 1 Organism: Homo Sapiens
+ img/unknown.png phosphorylation PRKCQ 0.543
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation PRKCQ 0.547
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation HSF1 0.355
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png relocalization PRKCQ 0.411
Publications: 1 Organism: Homo Sapiens
+ form complex img/form-complex.png binding PKCtheta/Nfix 0.2
Publications: 1 Organism: Mus Musculus
+ up-regulates activity img/direct-activation.png phosphorylation MGluR 0.294
Publications: 1 Organism: In Vitro
+ up-regulates activity img/direct-activation.png phosphorylation CBL 0.361
Publications: 1 Organism: Mus Musculus
+ up-regulates quantity by expression img/indirect-activation.png transcriptional regulation ITGB1 0.2
Publications: 1 Organism: Mus Musculus
+ up-regulates img/indirect-activation.png PRKCQ 0.601
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation PRKCQ 0.351
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png binding PRKCQ 0.8
Publications: 1 Organism: Homo Sapiens