The function of CETN1 (centrin 1, ENSG00000177143) is as follows. Plays a fundamental role in microtubule-organizing center structure and function (PubMed:8175926). Plays a role in sperm cilia formation (By similarity). {ECO:0000250|UniProtKB:P41209, ECO:0000269|PubMed:8175926}.