The function of Ensembl gene identifier ENSG00000170950 (PGK2, phosphoglycerate kinase 2) is as follows. Catalyzes the reversible conversion of 1,3-diphosphoglycerate to 3-phosphoglycerate and plays a role in glycolysis and gluconeogenesis (By similarity). Essential for sperm motility and male fertility (PubMed:26677959). Not required for the completion of spermatogenesis (By similarity). {ECO:0000250|UniProtKB:P09041, ECO:0000269|PubMed:26677959}.