3'-脱氧-β-d-阿皮奥-d-弗拉诺西尔核酸的合成和生物物理特性
Victorio Jauregui-Matos1,2, Dhrubajyoti Datta1, Jayanta Kundu1
1Alnylam Pharmaceuticals, 675 West Kendall, Cambridge, Massachusetts 02142, United States.
ACS chemical biology
|October 23, 2025
概括
研究人员合成了称为apioNAs的新型改性核酸构建块. 这些apioNA对DNA/RNA降解具有很高的抗性,从而使潜在的治疗性寡核酸开发成为可能.
科学领域:
- 核酸化学的核酸化学
- 生物化学 生物化学
- 合成生物学 合成生物学
背景情况:
- 改性核酸对于治疗应用至关重要.
- 含有3'-deoxyapio的核酸 (apioNA) 具有独特的 furanose 配置.
- 开发新型核酸类似物的高效合成方法是必不可少的.
研究的目的:
- 开发一个易于合成的24个apioNA构建块,包括酸胺,H-酸盐,固体支物和核酸三酸盐.
- 评估apioNA修饰的DNA和RNA复合体的热力学稳定性和结构性质.
- 评估apioNAs的外核酶耐药性和聚合酶基质兼容性.
主要方法:
- 合成24个apioNA构成块,从一种常见的糖中间产物中合成,这种中间产物是从d-(+) - xylose中衍生出来的.
- 用单个apioNA修饰的DNA/RNA复杂体的热力学稳定性评估.
- 一个apioNA修饰的RNA八度体的晶体结构的确定.
- 对apioNA修饰DNA的外核酶耐药性测试.
- 含有apioNA的DNA复合体的分子建模.
- 用工程聚合酶对apioNA核酸三酸盐 (NTP) 的基质评价.
主要成果:
- 实现了24个apioNA构建块 (胺酸,H-酸,固体支,NTP) 的简单合成.
- 阿皮奥纳的修改导致热力学稳定性较差的DNA和RNA复合体.
- 晶体结构揭示了类似RNA的apioNA残留结构,局部重定向有助于不稳定.
- 在DNA末端的ApioNA修饰赋予了对3'-和5'-外核酶的极高耐药性.
- 分子建模合理化了双重不稳定和外核酶抵抗.
- 对工程聚合酶的ApioNA NTP基质效率是酶和核基依赖的.
结论:
- 合成的apioNA构建块有助于将这种改性核酸纳入治疗性寡核酸中.
- ApioNAs表现出显著的外核酶耐药性,使其成为治疗应用的前景.
- 由于其独特的特性和潜在的治疗效用,需要进一步评估apioNAs.
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