FunctionCentrosomal protein required for establishing a robust mitotic centrosome architecture that can endure the forces that converge on the centrosomes during spindle formation. Required for stabilizing the expanded pericentriolar material around the centriole.
Sequence similaritiesBelongs to the kizuna family.
Post-translational modificationsPhosphorylation at Thr-379 by PLK1 is not needed for centrosomal localization or pericentriolar material expansion but is indispensable for spindle-pole stabilization.
Cellular localizationCytoplasm > cytoskeleton > centrosome. Localizes to centrosomes throughout the cell cycle. After centrosome duplication, it usually remains associated only with the mother centrosome, containing the older mature centriole and particles surrounding it. During prophase, additional particles accumulate around both separating centrosomes. Does not accumulate at the microtubule minus ends, but instead localizes to the centrosomes and centrosome-surrounding area in a microtubule-independent and dependent manner, respectively.