Essential for spermatogenesis and male fertility (By similarity). May play an important role in sperm head and tail formation (By similarity). May act as a tumor suppressor by inhibiting cell proliferation. {ECO:0000250|UniProtKB:Q8BLA1, ECO:0000269|PubMed:10213508}. This is the function of DLEC1 (DLEC1 cilia and flagella associated protein, ENSG00000008226).