Enables procollagen-proline 3-dioxygenase activity. Involved in collagen metabolic process and peptidyl-proline hydroxylation. Predicted to be located in several cellular components, including Golgi apparatus; basement membrane; and nucleoplasm. Predicted to be active in endoplasmic reticulum. Orthologous to human P3H2 (prolyl 3-hydroxylase 2). [provided by Alliance of Genome Resources, Apr 2022]