POC5 is a centrin-binding protein required for assembly of full-length centrioles. POC5 is not required for the initiation of procentriole assembly, but is essential for building the distal half of centrioles [].
This domain is found at the C terminus of centrosome-associated protein ALMS1, centrosomal protein of 295 kDa (CEP295, also known as KIAA1731) and (E2-independent) E3 ubiquitin-conjugating enzyme FATS (also known as C10orf90) [, ]. These proteins play a role in centrosomal functions. ALMS1 is implicated in ciliary function, cell cycle control, and intracellular transport. It interacts with alpha-actinin and components of the endosomal recycling pathway []. CEP295 is a centriole-enriched microtubule-binding protein involved in centriole biogenesis, essential for the generation of the distal portion of newborn centrioles and recruitment of centriolar proteins, such as POC1B, POC5 and CEP135 [, ].Centrosome-associated protein Alms1a, the Drosophila homologue of centrosome-associated protein ALMS1, plays critical role in ensuring centrosome duplication in asymmetrically dividing germline stem cells (GSCs), which is essential for the production of centrosomes and centrioles in all downstream germ cells []. This domain directly interacts with Klp10, a microtubule-depolymerizing kinesin of kinesin-13 family, at GSC centrosome []. Alms1a might recruit SAK for daughter centriole duplication [].
