a dual-specificity protein kinase of the DYRK family. Contains a nuclear targeting signal sequence, a protein kinase domain, a leucine zipper motif, and a highly conservative 13-consecutive-histidine repeat. May play a significant role in a pathway regulating cell proliferation and may be involved in brain development. Its gene is localized in the Down syndrome (DS) critical region of chromosome 21, and is a strong candidate gene for learning defects associated with Down syndrome. Overexpression in mice gives rise to neurological abnormalities similar to those observed in DS. Five splice-variant isoforms have been described. Note: This description may include information from UniProtKB.
Protein type: CMGC group; DYRK family; Dyrk1 subfamily; EC 18.104.22.168; Kinase, protein; Protein kinase, CMGC; Protein kinase, dual-specificity (non-receptor)
Molecular Function: non-membrane spanning protein tyrosine kinase activity; protein binding; protein kinase activity; protein self-association; protein serine/threonine kinase activity; protein-tyrosine kinase activity; tau protein binding
Biological Process: circadian rhythm; negative regulation of DNA damage response, signal transduction by p53 class mediator; nervous system development; peptidyl-threonine phosphorylation; peptidyl-tyrosine phosphorylation; protein amino acid autophosphorylation; protein amino acid phosphorylation