High-affinity uptake of alpha-glucosides such as maltose, turanose, isomaltose, alpha-methylglucoside, maltotriose, palatinose, trehalose, melezitose and glucose (PubMed:15128531, PubMed:10368160). Acts with the concomitant transport of protons into the cell (symport system) (By similarity). Provides an alternative and minor mechanism for growth on trehalose carbon source by transporting trehalose into the cytoplasm for conversion to glucose by neutral trehalase NTH1 (PubMed:15128531, PubMed:10368160). Severely decreases intracellular trehalose during growth on trehalose carbon source (PubMed:10368160). Decreases growth on trehalose carbon source, simultaneous disruption of ATH1 abolishes growth on trehalose carbon source (PubMed:15128531). Belongs to the major facilitator superfamily. Sugar transporter (TC 2.A.1.1) family. The alternative and minor mechanism for utilizing trehalose as a carbon source provided by the MAL11/AGT1 and NTH1 system is specific to S.cerevisiae strains with constitutive and non-glucose-repressible expression of the MAL genes.