Substrate Evaluation of<i>Rhodococcus erythropolis</i>SET1, a Nitrile Hydrolysing Bacterium, Demonstrating Dual Activity Strongly Dependent on Nitrile Sub-Structure
作者:Tracey M. Coady、Lee V. Coffey、Catherine O'Reilly、Claire M. Lennon
DOI:10.1002/ejoc.201403201
日期:2015.2
Rhodococcus erythropolis SET1, a novel nitrilehydrolysing bacterial isolate, has been undertaken with 34 nitriles, 33 chiral and 1 prochiral. These substrates consist primarily of β-hydroxy nitriles with varying alkyl and aryl groups at the β position and containing in several compounds different substituents α to the nitrile. In the case of β-hydroxy nitriles without substitution at the α position
Expanding the repertoire of nitrilases with broad substrate specificity and high substrate tolerance for biocatalytic applications
作者:Avinash Vellore Sunder、Shikha Shah、Pratima Rayavarapu、Pramod P. Wangikar
DOI:10.1016/j.procbio.2020.05.004
日期:2020.7
identified nine novel nitrilase sequences from bacteria and evaluated their activity on a broad spectrum of 23 industrially relevant nitrile substrates. Nitrilases from Zobellia galactanivorans, Achromobacter insolitus and Cupriavidus necator were highly active on varying classes of nitriles and applied as whole cell biocatalysts in lab scale processes. Z. galactanivorans nitrilase could convert 4-cyanopyridine
摘要 腈水解酶将腈酶促转化为羧酸在多种药物前体和精细化学品的绿色合成中具有重要意义。尽管已经对来自多种来源的腈水解酶进行了表征,但仍存在确定表现出更高底物耐受性和更好热稳定性的广谱腈水解酶以开发工业相关生物催化过程的范围。通过基因组挖掘,我们从细菌中鉴定了 9 种新型腈水解酶序列,并评估了它们对 23 种工业相关腈底物的广谱活性。来自 Zobellia galactanivorans、Achromobacter insolitus 和 Cupriavidus necator 的腈水解酶对不同种类的腈具有高度活性,并在实验室规模的过程中用作全细胞生物催化剂。Z。galactanivorans 腈水解酶可以通过补料分批添加底物在 3 小时内转化 4-氰基吡啶以达到 1.79 M 异烟酸的产量。来自 A. insolitus 的腈水解酶可以快速水解 630 mM 亚氨基二乙腈,在 1 小时内将 86%
An Enzyme Library Approach to Biocatalysis: Development of Nitrilases for Enantioselective Production of Carboxylic Acid Derivatives
作者:Grace DeSantis、Zuolin Zhu、William A. Greenberg、Kelvin Wong、Jenny Chaplin、Sarah R. Hanson、Bob Farwell、Lawrence W. Nicholson、Cynthia L. Rand、David P. Weiner、Dan E. Robertson、Mark J. Burk
DOI:10.1021/ja0259842
日期:2002.8.1
and diverse set of nitrilases is reported. The utility of this nitrilaselibrary for identifying enzymes that catalyze efficient production of valuable hydroxy carboxylicacidderivatives is demonstrated. Unprecedented enantioselectivity and substrate scope are highlighted for three newly discovered and distinct nitrilases. For example, a wide array of (R)-mandelic acidderivatives and analogues were
Nitrile hydratase enzymes in organic synthesis: Enantioselective synthesis of the lactone moiety of the mevinic acids
作者:Samuel J. Maddrell、Nicholas J. Turner、Alison Kerridge、Andrew J. Willetts、John Crosby
DOI:10.1016/0040-4039(96)01259-2
日期:1996.8
(R)-4-Hydroxy-5-cyanopentene (−)-9, a known precursor of the protected lactonemoiety of the mevinicacids 1, has been prepared in 9 steps from (S)-3-(benzyloxy)-4-cyanobutanoic acid 5 (88% e.e.), which was obtained by the asymmetric 2 step hydrolysis of 3-benzyloxyglutaronitrile 4 involving the successive activity of a nitrile hydratase and an amidase enzyme.
An Epoxide Ring-Opening Reaction via Hypervalent Silicate Intermediate: Synthesis of Statine
作者:Hiroyuki Konno、Emi Toshiro、Naoyuki Hinoda
DOI:10.1055/s-2003-41049
日期:——
cyanide-opening reaction of epoxide with TBAF and TMSN, in THF or TBAF and TMSCN in MeCN occurred regioselectively to afford β-hydroxy azides and cyanides in good yield. These hypervalentsilicates have been shown to be highly effective as nucleophilic azide and cyanide donors under mild conditions. This methodology has been applied to the preparation of statine.