在半合成生物体中复制非自然基对的结构-活动关系和优化
Aaron W Feldman1, Floyd E Romesberg1
1Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States.
Journal of the American Chemical Society
|August 11, 2017
概括
研究人员为半合成生物 (SSO) 开发了新的非自然基对 (UBP),以存储更多信息. 四种新型的UBP在体内改善了DNA保留,使SSO技术超越了自然的遗传限制.
科学领域:
- 合成生物学
- 基因工程
- 生物化学
背景情况:
- 半合成生物 (SSO) 旨在扩大遗传字母以增加信息存储.
- 非自然基对 (UBP) 对于创建SSO至关重要,之前的开发依赖于体外数据.
- 水和包装力量,而不是结合,驱动UBP的形成.
研究的目的:
- 在Escherichia coliSSO的体内环境中选和识别具有最佳性能和保留的新型UBPs.
- 为了研究体外和体外结构-活性关系 (SARs) 之间的差异,以研究UBP的发展.
- 推进能够存储和检索比自然生物更多信息的SSO的开发.
主要方法:
- 基于体外SAR数据的dNaM-d5SICS和dNaM-dTPT3等非自然基对 (UBPs) 的开发.
- 在Escherichia coli SSO中选135个候选UBP以获得最佳性能.
- 在SSO的DNA中对UBP保留的体内评估.
主要成果:
- 在体内发现的UBP的SAR与体内发现的SAR有显著差异.
- 与以前最好的UBPdNaM-dTP3相比,发现了四种新的UBP在SSO中具有更高的DNA保留率.
- 这项研究证实,优化的疏水和包装力可以有效地取代UBP中的天然结.
结论:
- 新的UBP已被确定在体内表现优于以前的候选物质,证明了UBP设计的疏水和包装力的潜力.
- 这些发现代表了SSO在增强信息存储和检索能力方面的重大进展.
- 优化UBP的体内性能对于实现半合成生物学的全部潜力至关重要.
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