酶性prenyl转移反应的结构功能分析确定了一个具有可修改特异性的反应室
Marco Jost1, Georg Zocher, Sylwia Tarcz
1Interfakultäres Institut für Biochemie, Universität Tübingen, Hoppe-Seyler-Strasse 4, 72076 Tübingen, Germany.
Journal of the American Chemical Society
|November 26, 2010
概括
菌的内醇前转移酶,如FtmPT1,是合成有价值化合物的关键. 结构和突变性研究揭示了这些酶的工作原理,显示了设计它们作为定制生物反应器的潜力,用于特定的prenyl转移反应.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 酶学 是一种酶学.
背景情况:
- 菌的英多尔前转移酶是参与各种生物合成途径的酶.
- 这些酶先化各种基质,显示出化学酶合成的潜力.
- FtmPT1对于合成具有抗瘤潜力的fumitremorgin型类化合物至关重要.
研究的目的:
- 确定Aspergillus fumigatus FtmPT1在未结合状态和三元复合体中的晶体结构.
- 通过结构和突变发生分析,阐明FtmPT1的催化机制和区域特异性决定因素.
- 探索工程真菌的潜力,用于特定的 prenyl 转移反应.
主要方法:
- 进行X射线晶体学,以获得FtmPT1.1.的高分辨率结构.
- 位点定向突变发生,以调查酶机制和基质特异性.
- 生物化学试验分析酶活性和区域选择性.
主要成果:
- 晶体结构揭示了FtmPT1具有罕见的α/β-桶折叠与一个中心的疏水反应室.
- 分析提供了对催化机制和调节区域特异性的因素的见解.
- 一个单一的突变 (G115T) 成功重定向了FtmPT1的区域选择性,证明了酶可修饰性.
结论:
- 菌的英多尔前转移酶共享保存的活性位点架构,其中的变异使多种基质结合成为可能.
- FtmPT1可以被设计为改变其区域选择性,突出其作为多功能生物催化剂的潜力.
- 这些发现支持将真菌的醇前转移酶作为可修改的生物反应器用于向前化.
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