Shuang Wei1, Xiao-Yang Zhang1, Yue Sun1, Louis Patrick Conway1, Li Liu1.
Abstract
BACKGROUND: The biocatalytic oxidation of UDP-glucose in the presence of NAD+ is catalyzed by UDP-glucose dehydrogenases.
OBJECTIVES: The main objective of this study was the characterization of a UDP-glucose dehydrogenase (AmUGD) from Akkermansia muciniphila, a bacterium originally isolated from human faeces in an anaerobic medium containing gastric mucin as the sole carbon source.
METHODS: The biochemical analysis of AmUGD was performed using a plate reader-based assay measuring the reaction by-product NADH. Furthermore, HPLC- and MALDI-ToF-MS- based methods were used for the enzyme characterization.
RESULTS: The recombinant form of the protein was expressed in E. coli and the purified enzyme exhibited optimum levels of activity at 37°C and pH 9.0. While the enzyme is active in the absence of metal ions, the presence of Zn2+ ions results in markedly enhanced levels of catalysis.
CONCLUSION: This study describes the first characterization of a nucleotide-processing enzyme from A. muciniphila. The ease of expression and purification of this enzyme make it ideal for biotechnological applications such as the enzymatic synthesis of nucleotide sugars, which may in turn be used for the synthesis of complex carbohydrates or glycoconjugates. Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.org.
BACKGROUND: The biocatalytic oxidation of UDP-glucose in the presence of NAD+ is catalyzed by UDP-glucose dehydrogenases.
OBJECTIVES: The main objective of this study was the characterization of a UDP-glucose dehydrogenase (AmUGD) from Akkermansia muciniphila, a bacterium originally isolated from human faeces in an anaerobic medium containing gastric mucin as the sole carbon source.
METHODS: The biochemical analysis of AmUGD was performed using a plate reader-based assay measuring the reaction by-product NADH. Furthermore, HPLC- and MALDI-ToF-MS- based methods were used for the enzyme characterization.
RESULTS: The recombinant form of the protein was expressed in E. coli and the purified enzyme exhibited optimum levels of activity at 37°C and pH 9.0. While the enzyme is active in the absence of metal ions, the presence of Zn2+ ions results in markedly enhanced levels of catalysis.
CONCLUSION: This study describes the first characterization of a nucleotide-processing enzyme from A. muciniphila. The ease of expression and purification of this enzyme make it ideal for biotechnological applications such as the enzymatic synthesis of nucleotide sugars, which may in turn be used for the synthesis of complex carbohydrates or glycoconjugates. Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.org.
Entities:
Keywords:
Akkermansia muciniphila; UDP-glucose dehydrogenases; UDP-glucuronic acid; glycoconjugates; nucleotide sugars
Mesh：
Substances：
Year: 2017
PMID： 28741460 DOI： 10.2174/0929866524666170724111147
Source DB: PubMed Journal: Protein Pept Lett ISSN： 0929-8665 Impact factor: 1.890