使用隔间自我复制和微流体平台解开Phi29 DNA聚合酶的盐分耐受性
Yaping Sun1, Danny Hsu Ko2, Jie Gao2
1Research Center of Molecular Diagnostics and Sequencing, Research Institute of Tsinghua University in Shenzhen, Shenzhen, China.
Frontiers in microbiology
|November 29, 2023
概括
为高盐条件优化phi29聚合酶可以增强纳米孔测序. 突变提高了盐分耐受性和过程性,这对于实时测序应用至关重要.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 纳米技术纳米技术
背景情况:
- 高盐度对于Phi29-alpha-hemolysin纳米孔测序信号至关重要.
- 较高的盐含量会抑制聚合酶活性和过程性,特别是在合成测序 (SBS) 所需的外核酶缺乏变体中.
研究的目的:
- 优化phi29聚合酶以提高盐分耐受性和过程性.
- 为了保持聚合酶的外核酶缺陷性质,用于纳米孔测序应用.
主要方法:
- 使用了耐盐分隔自我复制 (stCSR) 和微流体平台.
- 产生和分析了11个突变部位,改善了盐分耐受性.
- 进行了测序和生物化学分析,以评估聚合酶的性能.
主要成果:
- 确定了11个突变部位,增加了对盐的耐受性.
- 特定的氨基酸替代 (G197D,Y369E,T372N,I378R) 对于在高盐度下保持过程性至关重要.
- Y369E和T372N突变显著影响DNA聚合酶结合亲和力.
结论:
- 优化的phi29聚合酶变体在高盐纳米孔测序中表现出更好的性能.
- 突变增强了盐分耐受性和过程性,这对于实时测序至关重要.
- 这些发现推进了纳米孔测序技术及其应用.
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