(+)-3,6-环氧马来酰亚胺:一种由 CYP450 BM3-139-3 及其变体催化的 (+)-Bicyclogermacrene 氧化作用的新型衍生物。

IF 2.6 4区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
ChemBioChem Pub Date : 2024-10-27 DOI:10.1002/cbic.202400410
Kai Xu, Zheng-Yu Huang, Chen-Yi Sun, Dr. Jiang Pan, Prof. Dr. Chun-Xiu Li, Prof. Dr. Jian-He Xu
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引用次数: 0

摘要

(+)-Bicyclogermacrene 是一种倍半萜化合物,存在于多种植物精油中,是多种生物活性化合物的重要前体。研究表明,(+)-双环莽草烯的许多衍生物都具有重要的生物活性。巨型芽孢杆菌的细胞色素 P450 BM3 可催化多种底物和不同类型的氧化反应,因此成为氧化萜烯类化合物的有力工具。在这项研究中,我们利用 P450 BM3-139-3 变体对(+)-双环锗烯进行了体外酶促氧化,鉴定出了一种新型的(+)-双环锗烯氧化衍生物,命名为(+)-3,6-环氧马莲烯,以及一种未知的倍半萜类化合物,两者的比例为 70 :根据气相色谱峰面积)。(+)-3,6-epoxymaaliane 对大肠杆菌和金黄色葡萄球菌具有明显的抗菌活性。为了获得具有高选择性形成 (+)-3,6-epoxymaaliane 的更好的单加氧酶变体,我们将丙氨酸扫描与 "聚焦理性迭代位点特异性突变"(FRISM)策略相结合,对底物周围 5 Å 半径范围内最接近的残基进行修饰,从而创建了一个小而精的突变体库。结果,该方法产生了一种最佳变体,其转化率提高了 1.6 倍,转化率高达 964,可用于生产 (+)-3,6-环氧玛莲烯,并具有更高的产品选择性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

(+)-3,6-Epoxymaaliane: A Novel Derivative of (+)-Bicyclogermacrene Oxidation Catalyzed by CYP450 BM3-139-3 and Its Variants

(+)-3,6-Epoxymaaliane: A Novel Derivative of (+)-Bicyclogermacrene Oxidation Catalyzed by CYP450 BM3-139-3 and Its Variants

(+)-Bicyclogermacrene is a sesquiterpene compound found in various plant essential oils and serves as a crucial precursor for multiple biologically active compounds. Many derivatives of (+)-bicyclogermacrene have been shown to exhibit valuable bioactivities. Cytochrome P450 BM3 from Bacillus megaterium can catalyze a variety of substrates and different types of oxidation reactions, making it become a powerful tool for oxidizing terpenes. In this study, we employed P450 BM3-139-3 variant for in vitro enzymatic oxidation of (+)-bicyclogermacrene, identifying a novel oxidized derivative of (+)-bicyclogermacrene, named (+)-3,6-epoxymaaliane, and an unknown sesquiterpenoid in a ratio of 70 : 30 (by GC peak area). (+)-3,6-Epoxymaaliane showed demonstrated antibacterial activities toward Escherichia coli and Staphylococcus aureus. To obtain a better variant of the monooxygenase with a high selectivity to form (+)-3,6-epoxymaaliane, we combined alanine scanning with the “Focused Rational Iterative Site-Specific Mutagenesis” (FRISM) strategy to modify the closest residues within 5 Å radius surrounding the substrate to create a small-but-smart library of mutants. Consequently, it gave an optimal variant with 1.6-fold improvement, in a turnover number (TON) of up to 964 toward (+)-3,6-epoxymaaliane production with a higher product selectivity.

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来源期刊
ChemBioChem
ChemBioChem 生物-生化与分子生物学
CiteScore
6.10
自引率
3.10%
发文量
407
审稿时长
1 months
期刊介绍: ChemBioChem (Impact Factor 2018: 2.641) publishes important breakthroughs across all areas at the interface of chemistry and biology, including the fields of chemical biology, bioorganic chemistry, bioinorganic chemistry, synthetic biology, biocatalysis, bionanotechnology, and biomaterials. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies, and supported by the Asian Chemical Editorial Society (ACES).
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