Displays enzymatic activity both for medium-chain fatty acid (MCFA) ethyl ester synthesis and hydrolysis (esterase activity). MCFA are toxic for yeast and this enzyme could thus be involved in their detoxification by esterification. acetyl-CoA + an aliphatic alcohol = an acetyl ester + CoA Present with 573 molecules/cell in log phase SD medium. Belongs to the AB hydrolase superfamily. AB hydrolase 4 family.