Glycosylasparaginase catalyzes the hydrolysis of the glycosylamide bond of asparagine-linked glycoproteins. This enzyme is an amidase located inside lysosomes. Mutation of this gene in humans causes a genetic disorder known as aspartylglycosaminuria (AGU). The glycosylasparaginase precursor undergoes autoproteolysis through an N-O or N-S acyl rearrangement of the peptide bond, which leads to the cleavage of a peptide bond between an Asp and a Thr. This proteolysis step generates an exposed N-terminal catalytic threonine and activates the enzyme.
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