Catalyzes the hydrolysis of triacylglycerol. a triacylglycerol + H2O = a diacylglycerol + a fatty acid + H(+) Binds 1 Ca(2+) ion per subunit. Monomer. During infection. Cells lacking this gene do not show lipase activity. The lipase chaperone LifO is required for the folding of this protein during its passage through the periplasm. Belongs to the AB hydrolase superfamily. Pseudomonas lipase family. Extended N-terminus.