Herfried Griengl, Andrea Hickel, Dean V. Johnson, Michael Schmidt, Christoph Kratky and Helmut Schwab
Hydroxynitrile lyases (Hnls) catalyse enantioselectively both the cleavage and formation of cyanohydrins. Besides the well known (R)-selective enzyme from almonds, (S)-Hnls have recently become available in larger quantities by cloning and over-expression. The first three-dimensional structure of a Hnl has been established for the enzyme from Hevea brasiliensis. These results are the basis for a still broader application of Hnls for biocatalytic asymmetric syntheses on a preparative scale.