Enables procollagen-proline 4-dioxygenase activity. Involved in several processes, including cuticle development involved in collagen and cuticulin-based cuticle molting cycle; embryo development; and embryonic body morphogenesis. Located in endoplasmic reticulum. Expressed in hypodermis; muscle cell; neurons; and pharynx. Human ortholog(s) of this gene implicated in myopia. Is an ortholog of human P4HA1 (prolyl 4-hydroxylase subunit alpha 1) and P4HA2 (prolyl 4-hydroxylase subunit alpha 2).
Predicted to be located in extracellular space. Is an ortholog of human CLEC18A (C-type lectin domain family 18 member A); CLEC18B (C-type lectin domain family 18 member B); and CLEC18C (C-type lectin domain family 18 member C).