The function of Ensembl gene identifier ENSG00000117385 (P3H1, prolyl 3-hydroxylase 1) is as follows. Has prolyl 3-hydroxylase activity and catalyzes the post- translational formation of 3-hydroxyproline in -Xaa-Pro-Gly- sequences in pro-collagen chains, a critical step for the formation of mature collagen trimers (PubMed:39245686). May be involved in the secretory pathway of cells. Has growth suppressive activity in fibroblasts. .