通过改造的核糖体扩大蛋白质合成的范围
Larisa M Dedkova1, Sidney M Hecht1
1Biodesign Center for BioEnergetics and School of Molecular Sciences , Arizona State University , Tempe , Arizona 85287 , United States.
Journal of the American Chemical Society
|March 24, 2019
概括
核糖体工程允许使用非正规氨基酸直接合成蛋白质. 修改后的核糖体可以结合多种氨基酸类型,扩大蛋白质和的生产能力.
科学领域:
- 分子生物学
- 生物化学
- 合成生物学
背景情况:
- 核糖体是一个复杂的分子机器, 负责蛋白质合成,
- 核糖体RNAs (rRNAs) 通常是保存的,但可以被修改,特别是对抗生素的反应.
- 针对蛋白质合成的故意rRNA结构修改是最近的一项进展.
研究的目的:
- 审查rRNA修饰的历史和进展.
- 突出非正规氨基酸的直接核糖体结合.
- 讨论修改后核糖体在新生物材料生产中的潜力.
主要方法:
- 总结历史的rRNA修改.
- 证明 23S rRNA 修改用于结合非正规氨基酸.
- 讨论在体外和体内 (细菌细胞) 的修饰蛋白质.
主要成果:
- 随意修改23SrRNA可通过d-氨基酸,β-氨基酸和二胺基药物直接合成体.
- 修改后的核糖体可以直接产生含有非正规氨基酸的蛋白质,绕过传统的翻译后修改.
- 在试验室和细菌细胞中成功地制造出改性蛋白质.
结论:
- 工程核糖体提供了一个强大的平台来创造具有新型氨基酸组成的蛋白质.
- 这种方法扩大了蛋白质和合成的范围,超出了标准的20种氨基酸.
- 修改后的核糖体有望开发新的生物材料并推进合成生物学.
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