The function of PRSS37 (serine protease 37, ENSG00000165076) is as follows. Plays a role in male fertility (By similarity). May have a role in sperm migration or binding to zona-intact eggs (By similarity). Involved in the activation of the proacrosin/acrosin system (PubMed:27649891). {ECO:0000250|UniProtKB:Q9DAA4, ECO:0000269|PubMed:27649891}.