Discovery of Novel Bacterial Chalcone Isomerases by a Sequence‐Structure‐Function‐Evolution Strategy for Enzymatic Synthesis of (
<i>S</i>
)‐Flavanones
作者:Hannes Meinert、Dong Yi、Bastian Zirpel、Eva Schuiten、Torsten Geißler、Egon Gross、Stephan I. Brückner、Beate Hartmann、Carsten Röttger、Jakob P. Ley、Uwe T. Bornscheuer
DOI:10.1002/anie.202107182
日期:2021.7.26
strategy. These novel bacterial CHIs show diversity in substrate specificity towards various hydroxylated and methoxylated chalcones. The mutagenesis of CHIera according to the substrate binding models of these novel bacterial CHIs resulted in several variants with greatly improved activity towards these chalcones. Furthermore, the preparative scale conversion catalyzed by bacterial CHIs has been performed
查尔酮异构酶 (CHI) 是植物中类黄酮生物合成的关键酶。第一个细菌CHI(CHI时代)是从枝枝真杆菌中鉴定出来的,但其分布、进化来源、底物范围和立体选择性仍不清楚。在这里,我们描述了使用新型序列-结构-功能-进化 (SSFE) 策略从 Genbank 鉴定 66 种新型细菌 CHI。这些新型细菌 CHI 显示出对各种羟基化和甲氧基化查耳酮的底物特异性的多样性。CHI时代的诱变根据这些新型细菌 CHI 的底物结合模型,产生了几种变体,对这些查耳酮的活性大大提高。此外,已经对五种查耳酮进行了由细菌 CHIs 催化的制备规模转化,并显示出 ( S )-选择性高达 96% ee,这为高产率合成 ( S )-黄烷酮提供了一种替代生物催化途径。