Kinase from chicken homolog C ; hKFC-C ; Prostate-derived sterile 20-like kinase 1 ; PSK-1 ; Thousand and one amino acid protein kinase 2 ; KIAA0881 ; MAP3K17 ; PSK ; PSK1 ; UNQ2971/PRO7431
Categories
Elisa
Function
Serine/threonine-protein kinase involved in different processes such as membrane blebbing and apoptotic bodies formation DNA damage response and MAPK14/p38 MAPK stress-activated MAPK cascade. Phosphorylates itself, MBP, activated MAPK8, MAP2K3, MAP2K6 and tubulins. Activates the MAPK14/p38 MAPK signaling pathway through the specific activation and phosphorylation of the upstream MAP2K3 and MAP2K6 kinases. In response to DNA damage, involved in the G2/M transition DNA damage checkpoint by activating the p38/MAPK14 stress-activated MAPK cascade, probably by mediating phosphorylation of upstream MAP2K3 and MAP2K6 kinases. Isoform 1, but not isoform 2, plays a role in apoptotic morphological changes, including cell contraction, membrane blebbing and apoptotic bodies formation. This function, which requires the activation of MAPK8/JNK and nuclear localization of C-terminally truncated isoform 1, may be linked to the mitochondrial CASP9-associated death pathway. Isoform 1 binds to microtubules and affects their organization and stability independently of its kinase activity. Prevents MAP3K7-mediated activation of CHUK, and thus NF-kappa-B activation, but not that of MAPK8/JNK. May play a role in the osmotic stress-MAPK8 pathway. Isoform 2, but not isoform 1, is required for PCDH8 endocytosis. Following homophilic interactions between PCDH8 extracellular domains, isoform 2 phosphorylates and activates MAPK14/p38 MAPK which in tu phosphorylates isoform 2. This process leads to PCDH8 endocytosis and CDH2 cointealization. Both isoforms are involved in MAPK14 phosphorylation.
Specificity
Natural and recombinant Human Serine/threonine-protein kinase TAO2
Subcellular Location
Isoform 2 Cell projection dendrite In dendrites, colocalizes with PCDH8.
Interacts with MAP2K3 and MAP2K6 (By similarity). Self-associates. Interacts with tubulins through the C-terminal domain. Interacts with MAP3K7 and interfers with MAP3K7-binding to CHUK and thus prevents NF-kappa-B activation. Isoform 2 interacts with PCDH8; this complex may also include CDH2.