Utilizes succinyl-CoA to convert toxic acetate to acetyl-CoA and succinate. Required for growth on acetic acid and for resistance to high levels of acetic acid. Has also low activity with acetoacetate as substrate. acetate + succinyl-CoA = acetyl-CoA + succinate Subject to competitive inhibition by coenzyme A (CoA). kcat is 280 sec(-1) with acetate. kcat is 201 sec(-1) with succinyl-CoA. kcat is 75 sec(-1) with acetyl-CoA. kcat is 36.5 sec(-1) with acetoacetate. kcat is 70.9 sec(-1) with succinate. Metabolic intermediate biosynthesis; acetyl-CoA biosynthesis. Homodimer. Expressed at intermediate levels during the first growth phase, when ethanol is metabolized and acetic acid accumulates in the growth medium. Up-regulated during the second growth phase, when acetate is catabolized. Cells cannot grow on acetate and have lost the resistance to high levels of acetate, a characteristic of wild-type A.aceti. Belongs to the acetyl-CoA hydrolase/transferase family.