微生物通过全细胞生物催化剂合成m-tyrosine
Vanna Nguyen1, Ashley Tseng1, Cui Guo1
1Biotechnology Program, Department of Engineering Technology, Cullen College of Engineering, University of Houston, Houston, TX 77004, United States.
Enzyme and microbial technology
|January 28, 2025
概括
微生物对甲铁素 (m-tyrosine) 的产生是使用工程化大肠杆菌 (E. coli) 实现的. 这项研究展示了生产m-tyrosine的新方法,m-tyrosine是农业和医学的宝贵化合物.
科学领域:
- 生物技术是生物技术.
- 生物化学 生物化学
- 合成生物学 合成生物学
背景情况:
- 甲铁氨酸 (m-tyrosine) 是一种非蛋白质原性氨基酸,在农业和医学中具有潜在的应用.
- 低自然丰度的m-tyrosine限制了其广泛的使用.
- 微生物生产为获得m-tyrosine提供了一个可行的替代方案.
研究的目的:
- 为了确定微生物产生的m-tyrosine.
- 在芳香氨基酸氧化中设计酶以改变其区域选择性.
主要方法:
- 来自大肠杆菌中Streptomyces coeruleoribudus的表达的氨酸3-氧酶 (PacX) 用于m-tyrosine合成.
- 集成了一个辅助因子再生系统,以提高生物转化效率.
- 采用蛋白质工程来修改来自Xanthomonas campestris的氨氨酸4-基酶 (P4H).
主要成果:
- 在微生物中产生m-tyrosine,其度高达368 mg/L.
- 证明PacX利用了本土的大肠杆菌辅因子四胺素 (MH4).
- 设计了一种双重突变的P4H (F184C/G199T),该突变将基化区域选择性从para-转移到meta-position.
结论:
- 成功开发了一种全细胞生物催化方法,用于生产m-tyrosine.
- 通过蛋白质工程确定改变酶区域选择性的可行性.
- 为可扩展和可持续的m-tyrosine生产铺平了道路.
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