What is "l-arabinonolactonase"

In enzymology, a L-arabinonolactonase is an enzyme that catalyzes the chemical reaction

L-arabinono-1,4-lactone + HO $\rightleftharpoons$ L-arabinonate

Thus, the two substrates of this enzyme are L-arabinono-1,4-lactone and HO, whereas its product is L-arabinonate.

This enzyme belongs to the family of hydrolases, specifically those acting on carboxylic ester bonds. The systematic name of this enzyme class is L-arabinono-1,4-lactone lactonohydrolase. This enzyme participates in ascorbate and aldarate metabolism.