Probable lipolytic acyl hydrolase (LAH), an activity which is thought to be involved in the response of tubers to pathogens. Tuber. The nitrogen atoms of the two glycine residues in the GGXR motif define the oxyanion hole, and stabilize the oxyanion that forms during the nucleophilic attack by the catalytic serine during substrate cleavage. Patatin have a dual role as a somatic storage protein and as an enzyme involved in host resistance. Belongs to the patatin family.