Directed Evolution of Nonheme Fe Enzymes for Enantioselective and Regiodivergent 1,3- and 1,4-Nitrogen Migration: Biocatalytic Asymmetric Synthesis of Noncanonical α- and β-Amino Acids.
Two complementary nitrogen migratases were developed that enabled biocatalyst-controlled 1,3- and 1,4-nitrogen migration with excellent regioselectivity and exhibited similar kinetic isotope effects for both 1,5- and 1,6-HAT pathways, suggesting that enzyme engineering controls regio- and enantioselectivity but does no...