Mutation of Cysteine-295 to Alanine in Secondary Alcohol Dehydrogenase from Thermoanaerobacter ethanolicus Affects the Enantioselectivity and Substrate Specificity of Ketone Reductions
作者:Christian Heiss、Maris Laivenieks、J.Gregory Zeikus、Robert S Phillips
DOI:10.1016/s0968-0896(01)00073-6
日期:2001.7
The mutation of Cys-295 to alanine in Thermoanaerobacter ethanolicus secondaryalcoholdehydrogenase (SADH) was performed to give C295A SADH, on the basis of molecular modeling studies utilizing the X-ray crystal structure coordinates of the highly homologous T. brockii secondaryalcoholdehydrogenase (1YKF.PDB). This mutant SADH has activity for 2-propanol comparable to wild-type SADH. However, the
Asymmetric reduction of ethynyl ketones and ethynylketoesters by secondary alcohol dehydrogenase from Thermoanaerobacter ethanolicus †
作者:Christian Heiss、Robert S. Phillips
DOI:10.1039/b001329n
日期:——
Secondaryalcoholdehydrogenase (SADH) fromThermoanaerobacterethanolicus, an NADP-dependent, thermostable oxidoreductase, reduces ethynyl ketones and ethynylketoesters enantioselectively to the corresponding propargyl (propargyl = prop-2-ynyl) alcohols. Ethynyl ketones, in general, are reduced with moderate enantioselectivity (with the exception of 4-methylpent-1-yn-3-one, which gives the (S)-alcohol