设计一个模板独立的DNA聚合酶的活动
Marija Milisavljevic1,2, Teresa Rojas Rodriguez1, Courtney K Carlson3,4
1Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States.
ACS synthetic biology
|July 31, 2024
概括
蛋白质工程增强了DNA数据存储的终端脱核样转移酶 (TdT). 一种新型的高通量试验识别了具有提高效率和抑制剂耐药性的TdT变体,从而推进了酶性DNA编写.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 合成生物学 合成生物学
背景情况:
- 终端脱核样转移酶 (TdT) 对于模板独立的DNA合成至关重要,这是DNA信息存储的关键过程.
- 目前的TdT限制包括核糖核酸抑制和缓慢的整合率,阻碍其在先进的DNA编写中的应用.
- 对TdT序列-结构-功能关系的有限理解阻碍了合理的蛋白质工程努力.
研究的目的:
- 开发一种高通量选试验,用于测量TdT活动.
- 设计具有增强的催化效率和在抑制剂的存在下提高性能的TdT变体.
- 促进TdT的合理蛋白质工程,以改善DNA写作应用.
主要方法:
- 开发一种新的,易于修改的,基于乳液的,用于TdT活动的高通量选试验.
- 创建和选大型TdT突变库,以识别具有所需属性的变体.
- 在不需要蛋白质净化的情况下,对TdT活性进行定量测量.
主要成果:
- 成功的工程TdT突变体表现出改善的催化效率为脱氧核酸结合.
- 鉴定TdT变体在存在脱氧核酸和核酸时具有增强活性.
- 证明该试验能够在高通量中定量评估TdT活性.
结论:
- 开发的高通量测定使得TdT用于DNA信息存储的有效选和工程成为可能.
- 工程TdT变体显示出克服酶性DNA编写现有局限性的前景.
- 这项工作为合成生物学应用改进的DNA聚合酶的合理设计提供了基础.
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