Enables peptidyl-proline 4-dioxygenase activity. Involved in regulation of protein localization and response to hypoxia. Located in dendrite and nucleus. Expressed in ventral nerve cord and vulval precursor cell. Human ortholog(s) of this gene implicated in clear cell renal cell carcinoma and familial erythrocytosis 3. Is an ortholog of human EGLN1 (
egl-9 family hypoxia inducible factor 1) and EGLN2 (
egl-9 family hypoxia inducible factor 2).