用终端脱氧核样转移酶对2'-改性寡核酸的模板独立合成和3'-终端标记
Leping Sun1, Yuming Xiang1, Yuhui Du1
1MOE International Joint Research Laboratory on Synthetic Biology and Medicines, School of Biology and Biological Engineering, South China University of Technology, 510006 Guangzhou, China.
Nucleic acids research
|August 16, 2024
概括
终端脱氧核样转移酶 (TdTs) 显示了合成和标记具有2'修饰的外生核酸 (XNA) 的各种活动. 这使得DNA保护和仿真水凝构造等新型应用成为可能.
科学领域:
- 生物化学 生物化学
- 合成生物学 合成生物学
- 分子生物学分子生物学
背景情况:
- 异生菌核酸 (XNA) 与DNA相比提供了增强的稳定性和功能.
- 酶合成和XNA的标记对于扩大它们的应用至关重要.
- 终端脱核样转移酶 (TdTs) 已知用于DNA合成,但它们的XNA活性尚未得到充分研究.
研究的目的:
- 系统地调查三种TdT (牛,MTdT-evo,murine) 的合成和标记2e2-修饰XNAs的活动.
- 探索XNAs与自然或非自然核基的TdT介导扩展.
- 开发利用TdT对XNA的活性开发新的应用,包括DNA保护和材料合成.
主要方法:
- 通过TdTs将2e2 - methoxy NTPs,2e2 - fluoro NTPs和2e2 - fluoroarabino NTPs纳入模板独立.
- 使用TdT与各种 (d) NTP使用2e2修改XNA的扩展.
- 开发用于DNA保护和XNA标签的TdT介导策略.
- 构建DNA-XNA仿真水凝的方法.
主要成果:
- 证明了多种TdT活动,用于将多种2e2修饰核酸纳入DNA并扩展XNAs.
- 已建立的基于TdT的方法来保护使用XNA尾巴的单链DNA免受降解.
- 开发了TdT介导的2e2修饰XNA的2e2末端标签.
- 通过使用MTdT-evo.成功合成了一种DNA-2 e2 -fluoroarabino核酸 (FANA) 仿真水凝.
结论:
- 在XNAs的合成和修改方面,TdTs表现出显著和多功能的活动.
- TdT介导的XNA合成为DNA保护和功能材料创造提供了有效的策略.
- 这项工作扩展了XNA操纵和应用程序开发的工具包.
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