从细菌中采集的III型基因的基因组挖掘和生物工程
Kuang Xu1, Sijia Guo1, Wei Zhang2
1State Key Laboratory of Microbial Metabolism, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
International journal of molecular sciences
|September 14, 2024
概括
第三类,一种类,现在在细菌中发现,而不仅仅是真菌. 研究人员设计了一个关键酶,KchMA,以创建多种N-甲基化,解锁合成生物学应用的潜力.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 合成生物学 合成生物学
背景情况:
- 氨酸是通过核糖体合成和翻译后修改的 (RiPPs),其特征是α-N-甲基化骨干.
- 以前,III型玻素仅在真菌中被发现,这限制了它们已知的来源和应用.
- 玻的生物合成途径虽然在1997年被发现,但在很久以后才被完全阐明,这突显了该类正在进行的研究.
研究的目的:
- 为了调查细菌物种中III型氨酸的存在和潜力.
- 生物化学验证KchMA的自我甲基化活性,KchMA是氨酸生物合成中的关键酶.
- 通过蛋白酶和人工智能驱动的理性设计,设计KchMA用于生产各种N-甲基化.
主要方法:
- 进行了广泛的基因组挖掘,以确定细菌中的III型玻素序列.
- 进行了生化实验,以确认KchMA酶的自我甲基化活性.
- 商业蛋白酶处理和人工智能辅助理性设计的组合被用来设计KchMA.
主要成果:
- 基因组挖掘揭示了III型氨酸在细菌中普遍存在,扩大了它们已知的生态分布,超出了真核生物.
- 实验证实了KchMA的自我甲基化能力.
- 工程KchMA证明了生产各种N-甲基化的能力,展示了它的多功能性.
结论:
- 第三种类型的蛋白广泛分布在真核生物和细菌领域.
- 工程化KchMA酶提供了一个强大的工具,用于生成各种N-甲基化.
- 这些发现强调了III型素作为合成生物学中多功能工具的巨大潜力.
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