Displays two enzymatic activities involved in procollagen processing. Forms hydroxylysine residues in -Xaa-Lys-Gly- sequences in collagens. These hydroxylysines are subsequentially glucosylated by a glucosyltransferase activity. Collagen post-translationally modified is detected in mimivirus virion. 2-oxoglutarate + L-lysyl-[collagen] + O2 = (5R)-5-hydroxy-L-lysyl-[collagen] + CO2 + succinate