Enables ATP binding activity; magnesium ion binding activity; and protein serine/threonine kinase activity. Involved in several processes, including erythrocyte differentiation; negative regulation of DNA damage response, signal transduction by p53 class mediator; and protein phosphorylation. Predicted to be located in several cellular components, including cytoplasmic stress granule; nuclear speck; and pericentriolar material. Predicted to be active in cytoplasm; cytoskeleton; and nucleus. Is expressed in several structures, including alimentary system; hemolymphoid system gland; musculature; nasal cavity epithelium; and reproductive system. Orthologous to human DYRK3 (dual specificity tyrosine phosphorylation regulated kinase 3). [provided by Alliance of Genome Resources, Apr 2022]