通过FRET,可以实时检测RNA与小分子的结合
Yun Xie1, Andrew V Dix, Yitzhak Tor
1Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0358, USA.
Journal of the American Chemical Society
|November 14, 2009
概括
一个新的平台使用光探针来检测抗生素与细菌核糖体RNA (rRNA) A位点的结合. 这种福斯特共振能量转移 (FRET) 方法准确地测量了抗生素相互作用和竞争性取代.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 细菌rRNA的A位点是抗生素的关键目标.
- 开发强大的方法来分析抗生素结合对于药物发现至关重要.
研究的目的:
- 开发一种用于分析和发现针对细菌rRNA A-site的抗生素的新平台.
- 使用弗斯特共振能量转移 (FRET) 来敏感检测抗生素-RNA相互作用.
主要方法:
- 将发射性乌拉替代物纳入RNA的A位点.
- 用光接受器标记氨基甘油酸抗生素 (7-二甲基氨基库马林-3-碳氧酸).
- 使用具有27 Å的最佳福斯特半径 (R(0) 的FRET对来监测绑定事件.
主要成果:
- 在aminoglycoside与排放性A位点结构结合后证明成功生成FRET信号.
- 通过捐赠体排放灭和接受体排放增强,量化结合亲和力 (EC(50) 值.
- 通过其他A位点结合剂成功检测出氨基甘油酸的竞争性取代.
结论:
- 开发的基于FRET的平台为抗生素发现和分析提供了强大的方法.
- 这种方法可以准确地确定直接约束和竞争性排位事件.
- 该系统的灵敏度依赖于两个染色体之间的相互作用,而不是单个光体的环境变化.
相关概念视频
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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
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