Engineering catalytically promiscuous enzymes to serve new functions

Area of Science:

• Biochemistry
• Enzymology
• Protein Engineering

Background:

• Catalytic promiscuity, the ability of enzymes to catalyze multiple distinct reactions, is increasingly recognized for its significance in nature and potential for functional redesign.
• The discovery of additional promiscuous enzymes highlights the importance of this trait in biological systems and evolution.

Purpose of the Study:

• To comprehensively review the factors influencing enzyme catalytic promiscuity.
• To explore protein engineering strategies for enhancing enzyme activity and stereoselectivity.
• To discuss the role of catalytic promiscuity in enzyme evolution and its applications.

Main Methods:

• Examination of variations in substrate binding modes and high-energy intermediate stability.
• Analysis of the roles of critical amino acid residues in catalytic mechanisms.
• Review of protein engineering technologies and strategies for enzyme modification.

Main Results:

• Identified key factors influencing catalytic promiscuity, including substrate binding, intermediate stability, and catalytic residues.
• Highlighted the induction of novel reactions through alterations in the enzyme's catalytic environment, such as light-induced reactions.
• Summarized current protein engineering approaches for improving enzyme performance.

Conclusions:

• Catalytic promiscuity is a fundamental aspect of enzyme evolution with significant implications for functional redesign.
• Protein engineering offers powerful tools to expand enzyme capabilities for industrial applications.
• Further research into the origins and mechanisms of catalytic promiscuity is essential for harnessing its full potential.