intramolecular transferase activity (1,4)-alpha-D-glucan 1-alpha-D-glucosylmutase activity https://github.com/geneontology/go-ontology/issues/30193 RHEA:13621 MetaCyc:5.4.99.15-RXN molecular_function malto-oligosyltrehalose synthase activity (1->4)-alpha-D-glucan 1-alpha-D-glucosylmutase Catalysis of the reaction: 4-[(1->4)-alpha-D-glucosyl](n-1)-D-glucose = 1-alpha-D-[(1->4)-alpha-D-glucosyl](n-1)-alpha-D-glucopyranoside. GO:0047470 EC:5.4.99.15 maltodextrin alpha-D-glucosyltransferase activity