Required to maintain the structure of the centrosomal microtubule organizing center (MTOC) during mitosis. May have a preferential role in regulating neurogenesis. Required for germ cell mitosis and oocyte differentiation. {ECO:0000269|PubMed:10073938; ECO:0000269|PubMed:15242765; ECO:0000269|PubMed:9151690}.