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

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).

Keywords

• nicotinamide nucleoside kinase; β-nicotinamide mononucleotide; expression; identification; biocatalysis