SPICE1 localises to spindle microtubules in mitosis and to centrioles throughout the cell cycle. Deletion of SPICE1 compromises the architecture of spindles, the integrity of the spindle pole and the process of aligning chromosomes on the spindle (chromosome congression) []. SPICE1 interacts with CEP120 in centriole duplication and elongation [].
CEP120 is a centrosomal protein required for the recruitment of CEP295 to the proximal end of new-born centrioles at the centriolar microtubule wall during early S phase in a PLK4-dependent manner []. It has been shown to interact with SPICE1 and CPAP []. This entry also includes CEP120-like proteins from plants and fungi, which do not have centrosomes.Mutations of the CEP120 gene cause short-rib thoracic dysplasia 13 with or without polydactyly (SRTD13) []and Joubert syndrome 31 (JBTS31) [].