Four NAD(P)H-dependent non-flavin ene reductases have been investigated for their ability to reduce activatedC=Cbonds in an asymmetric fashion by using 20 structurally diverse substrates. In comparison with flavin-dependent OldYellowEnzyme homologues, a higher degree of electronic activation was required, because the best activities were obtained with enals and nitroalkenes rather than enones and
Biocatalytic Asymmetric Alkene Reduction: Crystal Structure and Characterization of a Double Bond Reductase from <i>Nicotiana tabacum</i>
作者:David J. Mansell、Helen S. Toogood、John Waller、John M. X. Hughes、Colin W. Levy、John M. Gardiner、Nigel S. Scrutton
DOI:10.1021/cs300709m
日期:2013.3.1
biocatalysis for the asymmetric reduction of activatedC═C is a powerful tool for the manufacture of high-value chemical commodities. The biocatalytic potential of “-ene” reductasesfrom the OldYellowEnzyme (OYE) family of oxidoreductases is well-known; however, the specificity of these enzymes toward mainly small molecule substrates has highlighted the need to discover “-ene” reductasesfrom different enzymatic
Opposite Stereochemical Courses for Enzyme-Mediated Alkene Reductions of an Enantiomeric Substrate Pair
作者:Despina J. Bougioukou、Jon D. Stewart
DOI:10.1021/ja800200r
日期:2008.6.18
olefin reductions for some activated alkenes at the expense of NADPH in the absence of a flavin cofactor. Unlike flavoprotein alkene reductases, where net trans-addition of hydrogen has been consistently observed, Ltb4dh reduced both enantiomers of perillaldehyde to the same cis-product. To uncover the reason for this unexpected result, the stereochemicalcourses of perillaldehyde reductions by Ltb4dh