chondroitin sulfate proteoglycan metabolic process +
dermatan sulfate proteoglycan metabolic process +
elastin catabolic process +
heparan sulfate proteoglycan metabolic process +
mannoprotein catabolic process
O-sialoglycoprotein catabolic process
protein deglycosylation involved in glycoprotein catabolic process +
proteoglycan biosynthetic process +
proteoglycan catabolic process +
The chemical reactions and pathways resulting in the breakdown of proteoglycans, any glycoprotein in which the carbohydrate units are glycosaminoglycans.