The Substrate Spectra of Pentaerythritol Tetranitrate Reductase, Morphinone Reductase,<i>N</i>-Ethylmaleimide Reductase and Estrogen-Binding Protein in the Asymmetric Bioreduction of Activated Alkenes
作者:Nicole J. Mueller、Clemens Stueckler、Bernhard Hauer、Nina Baudendistel、Hazel Housden、Neil C. Bruce、Kurt Faber
DOI:10.1002/adsc.200900832
日期:2010.2.15
yellow enzyme (OYE) family, pentaerythritoltetranitrate (PETNR) reductase, N-ethylmaleimidereductase (NEMR), morphinonereductase (MorR) and estrogen-bindingprotein (EBP1), exhibited a broad substrate tolerance by accepting conjugated enals, enones, imides, dicarboxylic acids and esters, as well as a nitroalkene and therefore can be employed for the asymmetricbioreduction of carbon-carbon double (CC)
Asymmetric Bioreduction of Alkenes Using Ene–Reductases YersER and KYE1 and Effects of Organic Solvents
作者:Yanto Yanto、Christoph K. Winkler、Stephanie Lohr、Mélanie Hall、Kurt Faber、Andreas S. Bommarius
DOI:10.1021/ol200394p
日期:2011.5.20
activated alkenes by KYE1 from Kluyveromyces lactis and Yers-ER from Yersinia bercovieri, two ene–reductasesfrom the OldYellowEnzymefamily, showed a broad substrate spectrum with a moderate to excellent degree of stereoselectivity. Both substrate- and enzyme-based stereocontrols were observed to furnish opposite stereoisomeric products. The effects of organic solvents on enzyme activity and stereoselectivity
A Site-Saturated Mutagenesis Study of Pentaerythritol Tetranitrate Reductase Reveals that Residues 181 and 184 Influence Ligand Binding, Stereochemistry and Reactivity
作者:Helen S. Toogood、Anna Fryszkowska、Martyn Hulley、Michiyo Sakuma、David Mansell、Gill M. Stephens、John M. Gardiner、Nigel S. Scrutton
DOI:10.1002/cbic.201000662
日期:2011.3.21
Divergent evolution: A site‐saturation study of PETN reductase was performed at conserved substrate bindingresidues H181 and H184. These residues were shown to dramatically alter the ratio of alkene versus nitro‐group reduction in favour of oxime by‐product formation, as summarised in the picture.
Two “classical” Old Yellow Enzymes from Chryseobacterium sp. CA49: Broad substrate specificity of Chr-OYE1 and limited activity of Chr-OYE2
作者:Xiao-Qiong Pei、Meng-Yu Xu、Zhong-Liu Wu
DOI:10.1016/j.molcatb.2015.11.008
日期:2016.1
Two putative Old Yellow Enzyme (OYE) homologues, Chr-OYE1 and Chr-OYE2, were identified from the genome of Chryseobacterium sp. CA49 as new members of the "classical" subfamily. Chr-OYE1 and Chr-OYE2 were most closely related to the SYE4 from Shewanella oneidensis and NerA from Agrobacterium radiobacter with 41% and 45% identity, respectively. Both enzymes were expressed in Escherichia coli in soluble form, but their catalytic abilities as ene-reductases were quite different. Among the 19 substrate tested, Chr-OYE1 could catalyze the reduction of 18 of them including an ynone with excellent stereos electivity for several prochiral ones, and its specific activity was roughly 1100-fold high than Chr-OYE2, which only catalyzed 3 of the substrates. After restoring the conserved tyrosine, Chr-OYE2 remained the same substrate spectrum, but showed significantly enhanced activity and stereoselectivity. (C) 2015 Elsevier B.V. All rights reserved.