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葡萄糖6-酸盐脱酶变体增加了用于酵母异oprenoid生产的NADPH池
Sri Harsha Adusumilli1, Anuthariq Alikkam Veetil1, Chinmayee Choudhury2
1Department of Biological Sciences, Indian Institute of Science Education and Research Mohali, Manauli, India.
FEBS open bio
|December 21, 2023
概括
在合成生物学中增强异oprenoid 生产涉及提升尼古丁胺胺氨基二核酸 (NADPH) 水平. 这项研究提高了NADPH生成酶的效率,从而提高了二二烯酸结晶醇的产量.
科学领域:
- 代谢工程是代谢工程.
- 合成生物学 合成生物学
- 生物化学 生物化学
背景情况:
- 异类生物合成需要显著的尼古丁胺胺氨基二核酸盐 (NADPH) 辅因子.
- 目前提高异oprenoid产量的策略集中在增加流量或酶过度表达.
- 提高NADPH生成酶的效率提供了一个替代方法.
研究的目的:
- 为了提高NADPH生成效率以增加异oprenoid产量.
- 为了改造葡萄糖6酸脱酶 (G6PD) 以提高性能.
- 为了研究G6PD优化基因融合和理性突变发生.
主要方法:
- 开发了一种基因选,以识别改进的酶变体.
- 构建了G6PD与6 - 氨基甲酸酶 (6PGL) 和截断的HMG-CoA减少酶的基因融合.
- 采用理性突变发生法来创建具有增强活动的G6PD突变体.
主要成果:
- 一个没有链接器的G6PD-6PGL融合显示了对G6P的更高亲和力,增加了斯克拉醇产量.
- 与截断的HMG-CoA减少酶的G6PD融合也导致了更高的斯克拉醇产量.
- 突变的G6PD变种 (N403D和S238QI239F) 在体外活动高出15-25%并提高了斯克拉醇产量.
结论:
- 优化NADPH生成酶效率是增强异oprenoid生物合成的可行策略.
- 基因融合和理性突变发生的方法成功地改善了G6PD功能.
- 工程G6PD变种为需要更高异oprenoid产量的合成生物学应用提供了显著的好处.
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