The DsbA signal peptide-mediated secretion of a highly efficient raw-starch-digesting, recombinant α-amylase from Bacillus licheniformis ATCC 9945a

► A new approach for extracellular recombinant α-amylase production in E. coli. ► Secretion of α-amylase triggered by fusion to the signal peptide of DsbA protein. ► The recombinant α-amylase 8-11% more efficient in diverse raw starches hydrolysis. ► Recombinant and commercial enzyme comparable in raw starch hydrolysis efficiency.