在Pseudomonas putida中对联碳和能量代谢进行定量解码,以利用素碳
Nanqing Zhou1, Rebecca A Wilkes2, Xinyu Chen1
1Department of Civil and Environmental Engineering, McCormick School of Engineering and Applied Science, Northwestern University, Evanston, IL, USA.
Communications biology
|August 29, 2025
概括
通过重塑新陈代谢, Pseudomonas 种类有效地处理生物技术中的酸. 这项研究揭示了pyruvate carboxylase和glyoxylate转移如何平衡碳流量以产生必要的辅助因子.
科学领域:
- 微生物生物技术
- 代谢工程
- 合成生物学
背景情况:
- 土壤 Pseudomonas 种类是因其代谢红素衍生物的能力而成为红素价值化的关键目标.
- 了解Pseudomonas中性碳处理和辅因子生成之间的代谢协调对于优化生物技术应用至关重要.
研究的目的:
- 在使用酸时量化了解Pseudomonas putida KT2440的代谢平衡.
- 调查性催化和像NADPH和NADH这样的必需辅助因子的生成之间的协调.
主要方法:
- 包括蛋白质组学,代谢组学和动力13C代谢组学在内的多种组学研究.
- 定量13C流体学分析代谢重塑和辅助因子的产生.
- 用酸培养的Pseudomonas putida KT2440与酸盐的比较分析
主要成果:
- 蛋白质组学表明芳香传输和代谢蛋白质增加了140倍.
- 代谢学发现初始代谢的瓶,影响细胞能量充电.
- 证实了新陈代谢改造,包括增加的酸盐碳酶和酸盐突变活性.
- 13C- 流体学证明了结合的辅因子产生:通过性循环和氧化物突变产生50- 60%的NADPH和60- 80%的NADH.
- 与酸盐代谢相比,多达6倍的ATP余.
结论:
- Pseudomonas putida KT2440 重塑其新陈代谢以平衡酸代谢与辅因子生成.
- 酸盐碳酸酶和酸盐突变对于产生NADPH和NADH至关重要,支持高ATP余.
- 这种定量代谢蓝图可以预测工程素价值化途径中的辅因子失衡.
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