Concentration or activity of procollagen-lysine,2-oxoglutarate 5-dioxygenase 1 (PLOD1; also known as Lysyl hydroxylase; EC 1.14.11.4) as measured in cultured fibroblasts is below the limits of normal. PLOD1 catalyzes the formation of hydroxylysine in collagens and other proteins with collagen-like amino acid sequences, by the hydroxylation of lysine residues in X-lys-gly sequences. [from
HPO]