In asymmetrically dividing germline stem cells (GSCs), plays a critical role in ensuring centrosome duplication, which is essential for the production of centrosomes and centrioles in all downstream germ cells (PubMed:32965218). Might recruit SAK for daughter centriole duplication (PubMed:32965218). Interacts (via C-terminus) with Klp10A (PubMed:32965218). Interacts with SAK (PubMed:32965218). In male germline stem cells, gonialblasts and spermatogonia, localizes to the proximal end of the mother centrioles (PubMed:32965218). Only in male germ stem cells (GSCs), localizes asymmetrically to the mother centrosomes and within it with higher levels at both mother and daughter centrioles (PubMed:32965218). Colocalizes with SAK at the mother centrosome in GSCs (PubMed:32965218). Expressed in all germlines, including germline stem cells and spermatogonia. RNAi-mediated knockdown in asymmetrically dividing male germline stem cells (GSCs), results in loss of centriole duplication and thereby leads to complete loss of centrosomes (and centrioles) from all male germ cells (PubMed:32965218). In GSCs, results in the enrichment of both SAK and Sas-6 at the remaining elongated mother centrioles (PubMed:32965218). Does not change Klp10A centrosome localization in male germline stem cells (PubMed:32965218). RNAi-mediated knockdown in symmetrically dividing spermatogonia, does not affect normal centrosome duplication (PubMed:32965218). Belongs to the ALMS1 family.