合成方法来阻止-codon扫描突变的突变发生
Lihua Nie1, Jason J Lavinder, Mohosin Sarkar
1Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, USA.
Journal of the American Chemical Society
|April 2, 2011
概括
一种新方法使得使用珀停止编码子进行受控基因扫描,以插入各种氨基酸. 这种技术揭示了Rop蛋白中意想不到的蛋白质相互作用和潜在的四聚体形成.
科学领域:
- 分子生物学分子生物学
- 合成化学 合成化学
- 蛋白质工程是指蛋白质工程.
背景情况:
- 珀停止编码子 (TAG) 可以被抑制以结合非自然的氨基酸.
- 组合性突变发生允许系统的基因扫描和氨基酸结合.
- 罗普蛋白是一种用于研究蛋白质-蛋白质相互作用和等离子体复制数调节的模型系统.
研究的目的:
- 开发一种一般的组合性突变发生策略,用于用珀色停止编码子扫描基因.
- 为了利用这种策略将天然和非天然的氨基酸纳入Rop蛋白中.
- 为了研究Rop蛋白变体的功能,并利用光交叉链接探索蛋白质相互作用.
主要方法:
- 开发一种合成策略,使用酸化物进行受控基因扫描.
- 在Rop蛋白变体的体内活性查中,Rop蛋白变体含有内置的阿拉宁.
- 在Rop蛋白突变体中将光亲和标签p-基氨酸 (Bpa) 纳入.
- 紫外线照射和对交联的Rop蛋白产品的分析.
主要成果:
- 创建了一个多功能DNA库,用于在TAG编码子中结合多种氨基酸.
- 与体外研究相比,对Rop的氨酸整合显示了结合部位映射的差异.
- 尽管Phe14Bpa-Rop具有重要的作用,但Phe14Bpa-Rop的活性令人惊地低.
- 对Phe14Bpa-Rop的Bpa交联表明了二次体,三次体和四次体的形成,这表明四次体协会很弱.
结论:
- 开发的突变发生策略为基因扫描提供了完整的合成控制.
- Bpa交叉链接有效地捕获弱和短暂的蛋白质相互作用,揭示了Rop.中的潜在四聚体形成.
- 这种方法通过结合非自然氨基酸来促进蛋白质功能和相互作用的研究.
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