Cell Cycle Regulatory Protein

Cell cycle regulatory proteins are a broad class of molecules that control the progression and fidelity of the cell cycle, ensuring that cells divide accurately and only when appropriate. These proteins orchestrate key events such as DNA replication, chromosome segregation, and cell division by acting at specific checkpoints throughout the cell cycle. Key classes include cyclins, cyclin-dependent kinases (Cdks), checkpoint regulators (e.g., Rb, p53, p21), and ubiquitin ligases (e.g., SCF complex, Anaphase-Promoting Complex/APC). Dysregulation can lead to uncontrolled proliferation—a hallmark of cancer. Therapeutic targeting often focuses on modulating these pathways—for example, CDK inhibitors used in cancer therapy.

Phosphorylation, protein-protein interaction, proteolysis