TTK

Involved in mitotic spindle assembly checkpoint signaling, a process that delays anaphase until chromosomes are bioriented on the spindle, and in the repair of incorrect mitotic kinetochore-spindle microtubule attachments. Phosphorylates MAD1L1 to promote the mitotic spindle assembly checkpoint. Phosphorylates CDCA8/Borealin leading to enhanced AURKB activity at the kinetochore. Phosphorylates SKA3 at 'Ser-34' leading to dissociation of the SKA complex from microtubules and destabilization of microtubule-kinetochore attachments. Phosphorylates KNL1, KNTC1 and autophosphorylates. Phosphorylates MCRS1 which enhances recruitment of KIF2A to the minus end of spindle microtubules and promotes chromosome alignment..

Function from UniProtKB (P33981), read 2026-09-23. CC BY 4.0.