Cell cycle-coupled CK1δ turnover, autoinhibition, and activity
This study reveals that CK1δ activity and abundance are dynamically coordinated throughout the cell cycle, where free active kinase is degraded in G1, unassembled kinase is stabilized in S phase to support DNA damage signaling, and mitotic entry triggers autoinhibitory phosphorylation to preserve a kinase pool for rapid post-mitotic reactivation.