an ubiquitous protein kinase of the CK1 family. Together with Dvl-1 and Frat-1 activate the Wnt signaling pathway. Central component of the circadian clock. May act as a negative regulator of circadian rhythmicity by phosphorylating PER1 and PER2. May play a role in cell cycle progression. Two splice variant isoforms have been described. Component of the circadian core oscillator, which includes the CRY proteins, CLOCK, or NPAS2, BMAL1 or BMAL2, CK1-D and/or CK1-E, TIMELESS and the PER proteins. Interacts directly with PER1 and PER2 which may lead to their degradation. Interacts with SOCS3. Mutations in hamster and Drosophila orthologs have circadian rhythm phenotypes, and the circadian gene period (per) is a substrate in both human and fly. A coding SNP variant in human, which increases CK1 activity, is negatively associated with circadian disorder. LOF mutations and LOH seen in mammary ductal carcinoma. Note: This description may include information from UniProtKB.
Protein type: EC 220.127.116.11; Kinase, protein; Protein kinase, Ser/Thr (non-receptor); Protein kinase, CK1; CK1 group; CK1 family
Molecular Function: ATP binding; protein binding; protein kinase activity; protein serine/threonine kinase activity
Biological Process: circadian regulation of gene expression; circadian rhythm; DNA repair; G2/M transition of mitotic cell cycle; mitotic cell cycle; negative regulation of protein binding; negative regulation of Wnt receptor signaling pathway; organelle organization and biogenesis; peptidyl-serine phosphorylation; positive regulation of proteasomal ubiquitin-dependent protein catabolic process; protein amino acid phosphorylation; regulation of circadian rhythm; signal transduction; Wnt receptor signaling pathway
LTP: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.