Improved production of 1-deoxynojirymicin in Escherichia coli through metabolic engineering.
Azasugars, such as 1-deoxynojirymicin (1-DNJ), are associated with diverse pharmaceutical applications, such as antidiabetic, anti-obesity, anti-HIV, and antitumor properties. Different azasugars have been isolated from diverse microbial and plant sources though complicated purification steps, or generated by costly chemical synthesis processes. But the biosynthesis of such potent molecules using Escherichia coli as a heterologous host provides a broader opportunity to access these molecules, particularly by utilizing synthetic biological, metabolic engineering, and process optimization approaches. This work used an integrated approach of synthetic biology, enzyme engineering, and pathway optimization for rational metabolic engineering, leading to the improved production of 1-DNJ. The production of 1-DNJ in recombinant E. coli culture broth was confirmed by enzymatic assays and mass spectrometric analysis. Specifically, the pathway engineering for its key precursor, fructose-6-phosphate, along with optimized media condition, results in the highest production levels. When combined, 1-DNJ production was extended to ~ 273 mg/L, which is the highest titer of production of 1-DNJ reported using E. coli.
['Rayamajhi|Vijay|V|', 'Dhakal|Dipesh|D|', 'Chaudhary|Amit Kumar|AK|', 'Sohng|Jae Kyung|JK|http://orcid.org/0000-0003-1583-5046']
D017485:1-Deoxynojirimycin D001426:Bacterial Proteins D053898:Biosynthetic Pathways D003001:Cloning, Molecular D003470:Culture Media D004269:DNA, Bacterial D004926:Escherichia coli D005285:Fermentation D005636:Fructosephosphates D005798:Genes, Bacterial D060847:Metabolic Engineering D058615:Synthetic Biology
1-Deoxynojirymicin Metabolic engineering Azasugars Pathway optimization