High affinity monocarboxylate transporter (MCT) involved in acetate uptake. Unlike other activities involved in acetate utilization, acpA is dispensable for growth on the acetate precursor ethanol. Expression is induced by ethanol and ethyl acetate and is mediated by the specific transcriptional activator of genes of the acetate utilization pathway facB. Expression is also induced by low concentrations of acetate or propionate and under the controle of the facB transcription activator. Leads to reduced growth when acetate is used as sole carbon source at low concentration and in a high pH medium. Belongs to the acetate uptake transporter (AceTr) (TC 2.A.96) family.