Shows both esterase and beta-lactamase activities, with a much higher activity against phenyl esters than against beta-lactams (PubMed:26398213, PubMed:26672466). Shows esterase activity against both long-chain and short-chain p-nitrophenol (pNP) esters, with a preference for shorter chain esters (PubMed:26398213, PubMed:26672466). Hydrolyzes substrates containing beta-lactam ring such as nitrocefin and ampicillin (PubMed:26672466). Functions as an immunogen that activates both humoral and cell-mediated responses (PubMed:26398213). a fatty acid ester + H2O = a fatty acid + an aliphatic alcohol + H(+) an acetyl ester + H2O = acetate + an aliphatic alcohol + H(+) a butanoate ester + H2O = an aliphatic alcohol + butanoate + H(+) an octanoate ester + H2O = an aliphatic alcohol + H(+) + octanoate decanoate ester + H2O = an aliphatic alcohol + decanoate + H(+) a dodecanoate ester + H2O = an aliphatic alcohol + dodecanoate + H(+) a tetradecanoate ester + H2O = an aliphatic alcohol + H(+) + tetradecanoate H2O + hexadecanoate ester = an aliphatic alcohol + H(+) + hexadecanoate H2O + octadecanoate ester = an aliphatic alcohol + H(+) + octadecanoate a hexanoate ester + H2O = an aliphatic alcohol + H(+) + hexanoate a beta-lactam + H2O = a substituted beta-amino acid Esterase and beta-lactamase activities are inhibited by the active site residue modifiers phenylmethanesulfonylflouride (PMSF) and diethylpyrocarbonate (DEPC). kcat is 0.0932 sec(-1) with pNP-butyrate as substrate. Optimum pH is 7.0 (with pNP-butyrate as substrate). Optimum temperature is 40 degrees Celsius (with pNP-butyrate as substrate). Up-regulated in acidic and oxidative stress conditions. Belongs to the beta-lactamase family.