Plays an important role in the metabolism of acetone derived from propane oxidation (PubMed:17071761). Catalyzes the hydrolysis of methyl acetate to acetate and methanol (PubMed:17071761). H2O + methyl acetate = acetate + H(+) + methanol Induced by propane, 2-propanol and acetone. Belongs to the class-A beta-lactamase family.