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来自Corynebacterium glutamicum的新型NADPH生成型甘-3-酸盐脱酶的基于结构的功能分析

Hyeoncheol Francis Son¹, Woojin Park², Sangwoo Kim³

¹Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.

International journal of biological macromolecules

|November 22, 2023

概括

研究人员设计了一种来自Corynebacterium glutamicum的新型NADPH产生酶,CgGapX,以改善生物基化学品生产的辅因子供应. 这种增强的酶显著提高了催化效率.

科学领域:

生物化学生物化学
酵素工程是什么意思酵素工程
代谢工程是代谢工程.

背景情况:

在生物基化学品生产中,Corynebacterium glutamicum 具有至关重要的作用.
提高辅助因子 (NADPH) 的回收是提高产量的关键.
大多数有机体缺乏足够的NADPH产生酶,如GapDH.

研究的目的:

描述一种来自C. glutamicum (CgGapX) 的新型NADPH生成的甘甲基-3-酸盐脱酶 (GapDH).
阐明NADP稳定和酶稳定的结构基础.
为了改进CgGapX以提高催化性能.

主要方法:

对CgGapX的功能表征和晶体结构的确定.
在CgGapX的结构引导酶工程.
对GapX类酶的生物信息分析.

主要成果:

确定了CgGapX的晶体结构,揭示了独特的NADP稳定特征.
确定了影响酶稳定性的N端辅助域 (AD).
开发了一种工程CgGapX变体,具有4.3倍高的kcat和1.2倍高的kcat/KM.
生物信息分析表明,GapX类酶的稳定性受到影响的多种抗药物.

结论:

CgGapX是一种有前途的NADPH生成酶.
结构洞察力指导酶工程,以提高稳定性和活性.
设计的CgGapX可以改善NADPH辅因子池,用于工业生物技术.

关键词:

在Corynebacterium glutamicum的研究中,我们发现甘甲基-3-酸盐脱酶的使用.提供NADPH的NADPH提供.独特的辅因子选择性.

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