CDK11B/CDC2L1

CDK11B, also called CDC2L1, is the better-characterized of the two tandem CDK11 genes on chromosome 1p36 and encodes the p110 and p58 PITSLRE kinase forms. During apoptosis, p110 is cleaved by caspase-1 to generate p58, which accumulates at centrosomes and contributes to apoptotic dismantling of the cell, linking CDK11B to both cell-cycle and death signaling. With cyclin L partners, CDK11B regulates transcription, RNA splicing, sister chromatid cohesion and autophagy. CDK11B is broadly expressed and elevated in several cancers, including multiple myeloma and hepatocellular carcinoma, making it an emerging therapeutic target distinct from classic proliferative CDKs.