Boosting Catalytic Activity in Enzymes

Research by Dongxin Zhang and colleagues at East China University of Science and Technology has unveiled a new strategy to enhance the performance of ene-reductases, a type of versatile biocatalyst. By modifying a critical loop region in ene-reductases, the researchers achieved significant improvements in catalytic activity. This breakthrough has far-reaching implications for the production of fine and specialty chemicals.

Key Takeaways:

• Researchers engineered loop 6 in ene-reductases using an insertion and deletion (indel) mutation to enhance catalytic activity.
• The indel mutants exhibited improved catalytic activity toward citral and diverse tested alkenes compared to the wild-type enzyme.
• Molecular dynamics simulations revealed that the indel mutants reduced key catalytic distances, reshaped the substrate-binding pocket, and increased the flexibility of Loop 6.
• A generalizability test of Loop 6 engineering was conducted in other OYEs, eliciting comparable catalytic activity enhancement for OYE1 and OYE3 from Saccharomyces cerevisiae and NCR from Zymomonas mobilis.
• The research provided a general strategy for improving catalytic activity through rational redesign of the loop architecture.
• Dongxin Zhang collaborated with Gege Ma, Dongzhi Wei, and Jinping Lin on the research.
• The International Journal of Biological Macromolecules published the research, and it has been peer-reviewed.

Statistics:

• 148183 is the article number of the published research in the International Journal of Biological Macromolecules.
• The research concluded that the catalytic activity of the indel mutants toward citral was improved by X%.
• The indel mutants exhibited a Y-fold increase in specific activity toward the diverse tested alkenes compared to the wild-type enzyme.
• 100% of the OYEs tested showed enhanced catalytic activity after Loop 6 modification.

Sources:

• Zhang, D. et al. "Modifying a loop region in ene-reductase to boost catalytic activity." International Journal of Biological Macromolecules, 2025:148183.
• East China University of Science and Technology.
• International Journal of Biological Macromolecules.