Predicted to enable procollagen-proline 3-dioxygenase activity. Predicted to be involved in collagen biosynthetic process; negative regulation of cell population proliferation; and peptidyl-lysine hydroxylation. Predicted to be part of catalytic complex. Predicted to be active in endoplasmic reticulum. Orthologous to human P3H3 (prolyl 3-hydroxylase 3). [provided by Alliance of Genome Resources, Apr 2022]