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FLASH GENE
Symbol PRKCQ contributors: mct/npt/pgu - updated : 23-10-2015
HGNC name protein kinase C, theta
HGNC id 9410
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
  • two zinc -dependant phorbol-ester and DAG binding domains
  • tyrosine kinase catalytic domain, and active kinase domain is required for retention of PRKCQ at the T cell immunological synapse
  • a V3 domain necessary and sufficient for localization to the immunological synapse mediated by association with the coreceptor CD28 and dependent on the kinase Lck
  • HOMOLOGY
    interspecies homolog to murine Prkcq
    Homologene
    FAMILY
  • protein kinase C (PKC) family of serine/threonine kinases
  • CATEGORY enzyme
    SUBCELLULAR LOCALIZATION     plasma membrane
        intracellular
    intracellular,cytoplasm,organelle,mitochondria
    intracellular,cytoplasm,cytosolic
    intracellular,nucleus
    text
  • translocates to the center of the immunological synapse (
  • basic FUNCTION
  • serine/threonine kinase, critically involved in the regulation of differentiation and proliferation of T lymphocytes
  • its activation induces insulin-mediated vasoconstriction by inhibition of Akt and stimulation of ERK1/2 in muscle resistance arteries
  • PRKCQ-dependent oxidative signaling organelles involved in activation-induced T-cell death
  • cooperates with atypical PRKCZ and PRKCI in NF-kappaB transactivation of T lymphocytes
  • PRKCA and PRKCQ have overlapping functions in alloimmunoreactivity and both PRKCQ and PRKCA isotypes must be targeted to prevent organ allograft rejection
  • in regulatory T cells, inhibits their function and, intriguingly, is sequestered from the activating cellular interface
  • maintains the correct structure and function of the heart by preventing cardiomyocyte cell death in response to work demand and to neuro-hormonal signals
  • serine/threonine kinase that plays an essential role in antigen-regulated responses of T lymphocytes
  • implicated in several physiological processes regulating the activation response of platelets
  • involved in the regulation of hemostasis and thrombosis
  • critical TCR signaling molecule that promotes the activation and differentiation of naive T cells into inflammatory effector T cells
  • able to control T cell-mediated immune responses by shifting the balance between the differentiation of effector T cells and inhibitory Tregs
  • integrates the signals from TCR signaling and Th17 priming cytokines to upregulate STAT3 via NFKB and AP1, resulting in the stimulation of Th17 differentiation
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism
    signaling
    a component
    INTERACTION
    DNA
    RNA
    small molecule
    protein
  • CD28 (for localization wihtin the immunologic synapse)
  • interaction with filamin A (required for T cell activation mediated by protein kinase C-theta)
  • established constituent of the immunological synapse, physically and functionally interacted with PRKCZ and PRKCI
  • crucial role of PRKCQ in positive selection of thymocytes in a pathway leading to the activation of ERK, AP1, NFAT, and NFkappaB
  • PRKCQ and CARD11 form a signalosome with TNFRSF4 in the immune synapse and play a major role in promoting maximum and prolonged NFKB activity mediated by TNFRSF4
  • KAT2A and EBF1 participate in regulation of PRKCQ gene expression in an opposite manner in immature B cells
  • to activate RAC1 and consequently PYGM, PRKCQ phosphorylates ARHGEF6 in T cells
  • in primary T cells, regulatory role of CORO1A on PRKCQ recruitment and function downstream of the TCR leading to NFKB1 transactivation
  • cell & other
    REGULATION
    ASSOCIATED DISORDERS
    corresponding disease(s)
    Susceptibility to rheumatoid arthritis
    Variant & Polymorphism
    Candidate gene
    Marker
    Therapy target
    SystemTypeDisorderPubmed
    immunologyautoimmune 
    potential therapy target for the prevention and treatment of autoimmune and alloimmune disease states
    ANIMAL & CELL MODELS
  • the thymus of PKCtheta(-/-) mouse contains significantly less mature single positive T cells compared to wild-type controls