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通过病毒传递改善了蛋白质拼接
Adam J Hume1,2,3, Dylan J Deeney1,2, John S Smetana4
1Department of Microbiology, Boston University School of Medicine, Boston, Massachusetts, USA.
mBio
|May 23, 2024
概括
再组合埃博拉病毒的连续传递工程与干预蛋白质 (intin) 记者导致突变,增强intin拼接活动. 这些蛋白质突变在不同系统和环境中提高了催化效率,为蛋白质开发提供了一种新方法.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 蛋白质工程是指蛋白质工程.
背景情况:
- 干预性蛋白质 (inteins) 是蛋白质元素,它们自剪切并结合侧面序列 (exteins).
- 整因已经被设计成生物系统的记者,例如使用Rada整因和ZsGreen光蛋白 (ZsG) 的埃博拉病毒 (EBOV) 自删除翻译记者.
- 此前将该报告者纳入重组EBOV (rEBOV-RadA-ZsG) 导致了复制缺陷,可能是由于RADA拼接不足.
研究的目的:
- 调查串行传递对rEBOV-RadA-ZsG的复制效率的影响.
- 识别和描述在病毒环境中增强蛋白活性的突变.
- 建立一种新的策略来选择具有改进的催化性能的整体.
主要方法:
- 在人类细胞中连续传递rEBOV-RadA-ZsG.
- 通过病毒基因组的测序以确定突变.
- 评估原生细胞和真核细胞表达系统中的蛋白质活性,具有各种蛋白质背景.
主要成果:
- 与未经传递的病毒相比,连续传递显著提高了rEBOV-RadA-ZsG的复制效率.
- 测序揭示了特定的因丁相关突变.
- 这些已识别的突变增强了在多种表达系统和外表环境中蛋白质的活性.
结论:
- 病毒传递是一种有效的方法,用于隔离具有增强催化活性的素.
- 鉴定到的突变赋予了改善的蛋白质拼接效率,独立于蛋白质的环境或表达系统.
- 这项工作提出了一种新方法,用于开发用于蛋白质工程应用的高度活性蛋白质.
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