A zinc-dependent enzyme isolated from a strain of the bacterium Pseudomonas. Because glucarpidase rapidly hydrolyzes methotrexate into inactive metabolites, it may be useful as a rescue agent for methotrexate-induced nephrotoxicity. In antibody-directed enzyme prodrug therapy (ADEPT), this agent is conjugated with an antibody that binds to a specific tumor cell type, allowing for glucarpidase-catalyzed activation of a co-administered prodrug at the site of the tumor. orA drug used to treat toxic levels of methotrexate (an anticancer drug) in the blood of patients with kidney problems. It is a bacterial enzyme that breaks down proteins and other substances, such as methotrexate. Glucarpidase may also help certain drugs kill cancer cells. It is a type of chemoprotective agent and a type of prodrug activator. Also called carboxypeptidase-G2 and Voraxaze.