大学化学 >> 2023, Vol. 38 >> Issue (4): 243-252.doi: 10.3866/PKU.DXHX202210002

所属专题: 第3届全国大学生化学实验创新设计竞赛

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理性改造光脱羧酶并用于反式脂肪酸选择性脱羧反应

曾森海, 鲍雨妍, 曹奡, 黄小强()   

  • 收稿日期:2022-10-04 录用日期:2022-12-11 发布日期:2023-04-27
  • 通讯作者: 黄小强 E-mail:huangx513@nju.edu.cn

Rational Evolution of a Fatty Acid Photodecarboxylase for Highly Selective Photodecarboxylation of trans Fatty Acid

Senhai Zeng, Yuyan Bao, Ao Cao, Xiaoqiang Huang()   

  • Received:2022-10-04 Accepted:2022-12-11 Published:2023-04-27
  • Contact: Xiaoqiang Huang E-mail:huangx513@nju.edu.cn

摘要:

立足光酶催化合成和酶的理性改造等研究前沿,设计了一例光酶催化的反式脂肪酸高选择性脱羧去除实验。具体地,本实验借助分子对接技术,理性设计脂肪酸光脱羧酶CvFAP的突变体V453E-CvFAP,并实验验证该突变体能够选择性地催化反油酸的脱羧反应,从而实现顺式脂肪酸的富集。实验涉及培养细胞、诱导酶表达、提取酶液、设计反应以及产物的定性、定量分析等内容,非常适合在化学生物学实验或综合化学实验课程中开设。

关键词: 酶的理性改造, 脂肪酸光脱羧酶CvFAP, 反式脂肪酸, 光酶催化, 脱羧反应

Abstract:

Photoenzymatic synthesis and rational engineering of enzymes are among the most emerging research areas. Herein, a highly selective photodecarboxylation of trans fatty acid was achieved by rational repurposing of the photodecarboxylase. Specifically, via molecular docking, a mutant of the photodecarboxylase CvFAP, namely V453E-CvFAP, was rationaly designed, constructed and subjected to the photoactivated decarboxylation of fatty acids. It turned out that the mutant was highly selective towards elaidic acid, thereby enriching oleic acid. Experimental trainings like cells culturing, protein expression, reaction design, and qualitative and quantitative analysis of products were included. The experiment is easy to conduct and safe for undergraduate chemistry experiment.

Key words: Rational evolution of enzyme, Photodecarboxylase CvFAP, Trans fatty acid, Photobiocatalysis, Decarboxylation