Involved in the biosynthesis of the streptose moiety of streptomycin. Catalyzes the formation of dTDP-glucose, from dTTP and glucose 1-phosphate, as well as its pyrophosphorolysis (By similarity). alpha-D-glucose 1-phosphate + dTTP + H(+) = diphosphate + dTDP-alpha-D-glucose Binds 1 Mg(2+) ion per subunit. Antibiotic biosynthesis; streptomycin biosynthesis. Belongs to the glucose-1-phosphate thymidylyltransferase family.