Nek8 contains an N-terminal kinase catalytic domain and a C-terminal RCC1 (regulator of chromosome condensation) domain. Nek8 human mutations have been shown to cause major organ developmental defects due to altered ciliogenesis and cell differentiation/proliferation through deregulation of the Hippo pathway []. Nek8 is one in a family of 11 different Neks (Nek1-11) that are involved in cell cycle control [].This entry represents the catalytic domain of Nek8.