食品科学 ›› 2023, Vol. 44 ›› Issue (16): 192-197.doi: 10.7506/spkx1002-6630-20220912-095

• 生物工程 • 上一篇    下一篇

酿酒酵母烟酰胺核苷激酶的异源表达及其酶学性质分析

何建菊,刘欣欣,史红玲,冉璐妮,王贤,张英君,唐存多   

  1. (1.南阳师范学院生命科学与农业工程学院,河南 南阳 473061;2.赊店老酒股份有限公司博士后创新实践基地,河南 南阳 473300;3.河南农业大学食品科学技术学院,河南 郑州 450002)
  • 出版日期:2023-08-25 发布日期:2023-09-01
  • 基金资助:
    国家自然科学基金青年科学基金项目(31900916);河南省高校科技创新人才项目(21HASTIT041); 河南省中央引导地方科技发展资金项目(Z20221343035)

Heterologous Expression and Enzymatic Properties of Nicotinamide Nucleoside Kinase from Saccharomyces cerevisiae

HE Jianju, LIU Xinxin, SHI Hongling, RAN Luni, WANG Xian, ZHANG Yingjun, TANG Cunduo   

  1. (1. College of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang 473061, China; 2. Postdoctoral Innovation Practice Base, She Dian Lao Jiu Co. Ltd., Nanyang 473300, China; 3. College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, China)
  • Online:2023-08-25 Published:2023-09-01

摘要: 从酿酒酵母中克隆烟酰胺核苷激酶 (nicotinamide riboside kinase,NRK)ScNRK1的编码基因,借助pET28a质粒在大肠杆菌中实现了可溶性表达。结果表明,发酵液中酶活力为14.75 IU/mL,纯化后的比活力为2 252.59 IU/mg。此外,ScNRK1的动力学参数也明显优于其他已报道的NRK,在烟酰胺单核苷酸的酶促合成中具有更大的优势。

关键词: 烟酰胺核苷激酶;β-烟酰胺核苷酸;表达;鉴定;生物催化

Abstract: In this study, the nicotinamide riboside kinase 1 gene (ScNRK1) was cloned from Saccharomyces cerevisiae, and its soluble expression in Escherichia coli was achieved using pET28a plasmid. The enzyme activity in the fermentation broth was 14.75 IU/mL, and the specific activity the purified enzyme was 2 252.59 IU/mg. In addition, the kinetic parameters of ScNRK1 were significantly higher than those of other reported nicotinamide nucleoside kinases, so ScNRK1 could be more advantageous in the enzymatic synthesis of nicotinamide mononucleotide (NMN).

Key words: nicotinamide nucleoside kinase; β-nicotinamide mononucleotide; expression; identification; biocatalysis

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