Journal
CHEMCATCHEM
Volume 6, Issue 8, Pages 2248-2252Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201402218
Keywords
asymmetric catalysis; biocatalysis; chiral amines; dehydrogenase; NADPH-dependent reductase
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The importance and structural diversity of chiral amines is well-demonstrated by the myriad nonenzymatic methods for their chemical production. In nature, the production of amines is performed by transamination rather than by reduction of an imine precursor derived from the corresponding ketone. Imine reductases, however, show great potential in the reduction of cyclic imines that are stable towards hydrolysis in aqueous reaction media. Here, we report the catalytic activity of two S-selective imine reductases towards 3,4-dihydroisoquinolines and 3,4-dihydro-beta-carbolines and their activity in the direct reductive amination of ketone substrates. The crystal structures of the enzyme from Streptomyces sp. GF3546 in complex with the cofactor NADPH and from Streptomyces aurantiacus in native form have been solved and refined to a resolution of 1.9 angstrom
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