Transporter protein required for ammonia export and acetate uptake and resistance. Necessary for up-regulation and down-regulation of meiotic plaque (MP) component levels in a dependency on external acetate. Has a role in ascus formation. Localizes to large detergent resistant patches of the cell membrane (DRM) enriched in ergosterol and sphingolipids (PubMed:17395151). During meiosis and by external ammonia. Belongs to the acetate uptake transporter (AceTr) (TC 2.A.96) family.