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Conservative Site-specific Recombination and Phase Variation02:53

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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
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相关实验视频

Updated: Jun 1, 2025

Directed Evolution Method in Saccharomyces cerevisiae: Mutant Library Creation and Screening
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Directed Evolution Method in Saccharomyces cerevisiae: Mutant Library Creation and Screening

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积极学习辅助的定向进化.

Jason Yang1, Ravi G Lal1, James C Bowden2,3

  • 1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA.

Nature communications
|January 17, 2025
PubMed
概括
此摘要是机器生成的。

积极学习辅助的定向进化 (ALDE) 通过使用机器学习来克服突变挑战来增强蛋白质工程. 这种方法显著提高了特定应用的酶效率.

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科学领域:

  • 生物化学 生物化学
  • 蛋白质工程是指蛋白质工程.
  • 计算生物学 计算生物学

背景情况:

  • 定向进化 (DE) 对于优化蛋白质功能至关重要.
  • DE与复杂的突变相互作用 (epistasis) 进行斗争.
  • 有效的蛋白质优化需要先进的策略.

研究的目的:

  • 引入积极学习辅助的定向进化 (ALDE) 作为一个改进的DE工作流程.
  • 解决优化具有表皮突变的蛋白质的挑战.
  • 提高蛋白质工程的效率.

主要方法:

  • 开发了一种代机器学习辅助的DE工作流程 (ALDE).
  • 利用不确定性量化进行高效的搜索空间探索.
  • 应用ALDE以优化酶活性部位中的五种表皮性残留物.

主要成果:

  • 在三轮实验中,为非本地循环化反应实现了显著的产量改善,从12%提高到93%.
  • 现有数据集的计算模拟支持ALDE在传统DE上的优势.
  • 在一个具有挑战性的蛋白质工程场景中证明ALDE的有效性.

结论:

  • 阿尔德为蛋白质工程提供了一个实用且广泛适用的策略.
  • ALDE 克服了传统 DE 的局限性,特别是在表观突变的情况下.
  • 这种方法释放了改善的蛋白质工程结果,并扩大了酶应用.