Colicino et al. talks about the role of Gravin anchoring PLK1 at mitotic centrosomes. This anchor is important for regulating centrosome organization and function as seen below with super resolution imaging of the centrosome component CEP215 disorganization when Gravin is lost.
A panel taken from Figure 4 from Colicino et al. of CEP215 disorganization primarily at a single mitotic spindle pole with Gravin loss. We argue this is through uncontrolled phosphorylation of CEP215 by PLK1 in the absence of Gravin.