核酸结构和功能的热可逆控制
Steve D Knutson1, Aimee A Sanford1, Colin S Swenson1
1Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States.
Journal of the American Chemical Society
|October 5, 2020
概括
格里奥克萨尔修饰为各种核酸提供可逆的热控制,使其在治疗和生物计算中的应用成为可能. 这种方法提高了PCR的特异性,并控制了活细胞中的基因表达.
科学领域:
- 合成生物学
- 生物化学
- 分子生物学
背景情况:
- 控制核酸结构和活性对于治疗,生物传感,纳米技术和生物计算的应用至关重要.
- 目前控制核酸的方法仅限于小分子或光刺激,热触发控制在很大程度上尚未探索.
- 目前的技术通常仅限于天然核酸,与聚合酶生成的序列不相容.
研究的目的:
- 开发一种热触发核酸结构和活性控制的方法.
- 解决现有的响应性核酸技术的局限性.
- 探索glyoxal作为一种多功能工具,用于传递对核酸的可逆热反应.
主要方法:
- 多种DNA和RNA结构的glyoxal修饰以共价地附着于核基.
- 对核酸结构和功能的glyoxal修饰的影响的描述.
- 对可调节的热活性恢复的glyoxal adduct去除动力学的评估.
- 在RNA合体,TNA,PNA支架,CRISPR-Cas9系统,PCR和反感性寡核酸中应用.
主要成果:
- 格里奥克萨尔修饰有效地和可逆地调节各种核酸支架的结构和活性.
- 可调节的热去除glyoxal添加物允许控制的核酸功能恢复.
- 在控制酶-核酸相互作用,CRISPR- Cas9活性,PCR特异性和通过抗意义寡核酸的基因表达方面,glyoxal表现出多功能性.
- 该方法与天然和合成核酸兼容,包括聚合酶生成的序列.
结论:
- 氧化是一种简单,无痕的方法,可以将可逆热响应传递给几乎任何核酸结构.
- 这种方法解决了合成生物学对可编程核酸组件的重大需求.
- 氧化为医学,纳米技术和生物计算领域的应用提供了一种多功能新工具.
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