L-Asparaginase hydrolyzes L-asparagine to L-aspartate and ammonia. The proenzyme undergoes an autoproteolytic cleavage into alpha and beta subunits to expose a threonine residue which becomes the N-terminal residue of the beta subunit. The threonine residue plays a central role in hydrolase activity. Some asparaginases can also hydrolyze L-glutamine and are termed glutaminase-asparaginase. This is a member of the Ntn-hydrolase superfamily, and this subfamily covers mostly bacterial and fungal enzymes.
Jiyao W et al.(2023). "The conserved domain database in 2023.",