合成NAD (P) (H) ATP再生的循环
1Department of Chemical Engineering, Columbia University, New York, New York 10027, United States.
ACS synthetic biology
|June 27, 2023
概括
这项研究提出了一种新的酶级联,用于再生细胞的能量货币腺三酸盐 (ATP). 这种方法为生物技术应用 (如合成细胞) 提供了可持续的解决方案.
科学领域:
- 生物化学 生物化学
- 合成生物学 合成生物学
- 酶学 是一种酶学.
背景情况:
- 腺三酸盐 (ATP) 对于细胞功能至关重要.
- 高效的ATP再生对于新兴生物技术,包括合成细胞至关重要.
- 目前用于ATP再生的方法通常需要复杂的条件或昂贵的组件.
研究的目的:
- 为ATP再生设计和建造一个无膜的酶级联.
- 为了利用NAD (P) (H) 依赖的氧化还原酶和基质特异性激酶来有效地合成ATP.
- 为了证明这种级联在无细胞蛋白质合成中的应用.
主要方法:
- 组装了一个没有膜的酶级联,使用选择的NAD (P) (H) 依赖的氧化还原酶和激酶.
- 改造了酶特异性,以防止NAD周期内的交叉反应.
- 使用不可逆转的燃料氧化,最初形成,后来甲醇.
- 利用NADH酸化到NADPH,然后通过NAD+激酶将酸盐转移到ADP.
主要成果:
- 达到高ATP再生率 (高达0.74 mmol/L/h),持续数小时.
- 使用单酸盐证明了ADP转化为ATP的90%以上.
- 在无细胞蛋白质合成反应中成功使用再生的ATP.
- 通过甲醇氧化提供动力时,增强ATP生产速度.
结论:
- 开发了一种使用酶级联的简单,高效的体外ATP再生系统.
- 该系统避免了需要pH梯度或昂贵的酸盐捐赠者.
- 这种基于NAD (P) (H) 循环的方法为生物技术应用提供了一个多功能平台,需要持续的ATP供应.
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