作者: Katharina Durchschein , Silvia Wallner , Peter Macheroux , Wilfried Schwab , Thorsten Winkler
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摘要: Four NAD(P)H-dependent non-flavin ene reductases have been investigated for their ability to reduce activated C=C bonds in an asymmetric fashion by using 20 structurally diverse substrates. In comparison with flavin-dependent Old Yellow Enzyme homologues, a higher degree of electronic activation was required, because the best activities were obtained enals and nitroalkenes rather than enones carboxylic esters. Although FaEO from Fragaria x ananassa (strawberry) its homologue SlEO Solanum lycopersicum (tomato) exhibited narrow substrate spectrum, progesterone 5β-reductase (At5β-StR) Arabidopsis thaliana (thale cress) leukotriene B4 12-hydroxydehydrogenase (LTB4DH/PGR) Rattus norvegicus (rat) appear be promising candidates, particular bioreduction open-chain enals, α,β-unsaturated γ-butyrolactones. Competing nitro reduction non-enzymatic Weitz–Scheffer epoxidation largely suppressed.