DYRK3

DYRK3, originally described as the erythroid-specific kinase REDK, shows a striking expression pattern concentrated in erythroid cells and in testis. Beyond erythroid differentiation, DYRK3 has a distinctive cytoplasmic role: during stress it accumulates in stress granules, and on stress relief it is released to activate mTORC1, thereby helping cells restore translation and proliferative signaling. Like other family members, it activates through autophosphorylation of an activation-loop tyrosine and then phosphorylates serine/threonine sites. DYRK3 is therefore a specialized stress-sensing kinase rather than a broad developmental regulator such as DYRK1A. Recombinant DYRK3 serves translational-control research and inhibitor selectivity panels.