将大肠杆菌转化为仅用甲醇生长的合成甲基菌
Frederic Y-H Chen1, Hsin-Wei Jung2, Chao-Yin Tsuei2
1Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan; Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA.
Cell
|August 12, 2020
概括
研究人员设计了大肠杆菌以有效地使用甲醇作为其唯一的碳来源. 这种合成甲基可以克服微生物C1转换的挑战,从而实现高细胞密度的生长.
科学领域:
- 合成生物学
- 微生物代谢
- 生物技术
背景情况:
- 甲醇是一种由甲或二氧化碳制成的可再生单碳 (C1) 原料.
- 甲基食生物利用 рибо单酸盐 (RuMP) 循环进行甲醇同化.
- 设计非甲基养生物来利用高密度的甲醇是一项挑战.
研究的目的:
- 设计一种能够有效利用甲醇的合成甲基.
- 克服非甲基养生物对C1的代谢障碍.
- 使用甲醇作为唯一的碳来源来实现高细胞密度的生长.
主要方法:
- 基于强度标准的大肠杆菌的代谢工程.
- 实验室进化以增强甲醇的吸收.
- 基因组编辑和突变分析,包括插入序列 (IS) 介导的拷贝数变异 (CNV).
主要成果:
- 确定了一种合成甲基菌菌株.
- 通过IS介导的CNV减轻了DNA-蛋白交联 (DPC) 的障碍.
- 在各种甲醇度中实现了与天然甲基食物相比的生长速度.
结论:
- 基因组编辑和进化可以改变C1化合物利用的微生物热带.
- 开发的合成甲基增强了生物C1转化能力.
- 这项工作证明了微生物原料的成功策略.
更多相关视频
相关概念视频
01:28Microbial Nutrition
876
Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...
876
01:15Metabolism of Chemolithotrophs
583
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
583