Fungal Dioxygenase AsqJ Is Promiscuous and Bimodal: Substrate‐Directed Formation of Quinolones versus Quinazolinones
作者:Manuel Einsiedler、Cooper S. Jamieson、Mark A. Maskeri、Kendall N. Houk、Tobias A. M. Gulder
DOI:10.1002/anie.202017086
日期:2021.4.6
induces a skeletal rearrangement in viridicatin biosynthesis in Aspergillus nidulans, generating a quinolone scaffold from benzo[1,4]diazepine‐2,5‐dione substrates. We report that AsqJ catalyzes an additional, entirely different reaction, simply by a change in substituent in the benzodiazepinedione substrate. This new mechanism is established by substrate screening, application of functional probes, and
先前的研究表明,Fe II /α-酮戊二酸依赖性双加氧酶AsqJ诱导构巢曲霉在viridicatin生物合成中的骨架重排,从苯并[1,4]二氮杂-2,5-二酮底物生成喹诺酮骨架。我们报告说,仅通过改变苯并二氮杂二酮底物中的取代基,AsqJ即可催化另外的,完全不同的反应。通过底物筛选,功能探针的应用和计算分析来建立这种新机制。AsqJ消费税H 2由合适的苯并[1,4]二氮杂-2-5,5-二酮底物的杂环结构生成CO,生成喹唑啉酮。这种新颖的AsqJ催化途径由复杂底物中的单个取代基控制。AsqJ的这种独特的底物定向反应性可实现喹诺酮或喹唑啉酮的靶向生物催化生成,喹诺酮或喹唑啉酮是两种具有特殊生物医学相关性的生物碱框架。