不同类型的有机酸盐与来自Ochrobactrum物种的甲基帕拉酸酶的分子结合
Nayana Bhat1, Bodee Nutho2, Chonnikan Hanpaibool1
1Center of Excellence in Biocatalyst and Sustainable Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.
Proteins
|August 30, 2023
概括
甲基帕拉氨酸酸酶 (MPH) 有效降解有机酸盐 (OPs). 这项研究揭示了profenofos与MPH的结合最强,为设计更好的生物修复剂提供了洞察力,以消除OP农药.
科学领域:
- 生物化学和酶学 生物化学和酶学
- 环境科学和生物修复
- 计算化学和分子建模
背景情况:
- 甲基帕拉酸酶 (MPH),一种金属β-乳酸酶,水解有机酸盐 (OPs),并显示出作为酶生物修复剂的前景.
- MPH的二维结构具有双核金属离子中心,影响其选择性模式,尽管金属离子在其功能进化中的确切作用尚不清楚.
- 了解金属离子协调对于阐明MPH的选择性和为OP降解设计改进的酶变体至关重要.
研究的目的:
- 为了研究和比较不同OP农药与MPH的结合,在存在下, (II) 金属离子.
- 阐明MPH与各种OP基质相互作用的分子机制.
- 为MPH的合理设计提供见解,以加强OP农药生物修复.
主要方法:
- 从Ochrobactrum sp.获得MPH的分子建模. 与OP结合的农药 (甲基氧,二,profenofos) 有关.
- 密度函数理论 (DFT) 计算用于优化对接的基板结构.
- 原子分子动力学 (MD) 模拟 (500 ns) 和具有约束力的自由能量计算.
- 基于结构的药模拟.
主要成果:
- OP杀虫剂偏好与较少埋藏的β金属离子协调,扰乱它们的协调球体.
- 阿尔法金属离子与所有测试的农药都没有协调.
- 这三种基质 (甲基,二,) 都在MPH活性部位内表现出有利的结合.
- 与甲基帕洛和二伏相比,Profenofos对MPH具有显著更强的结合亲和力.
结论:
- 该研究为MPH和各种OP农药之间的结合相互作用提供了详细的分子见解.
- 这些发现突出显示,profenofos是MPH的特别有效基质,表明了特定的结合模式.
- 这项研究为工程MPH变种奠定了基础,为OP农药的生物修复提高了有效性.
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