Synthetic affinity ligands as a novel tool to improve protein stability

Area of Science:

• Biochemistry
• Protein engineering
• Enzyme kinetics

Background:

• Cutinase from Fusarium solani pisi serves as a model enzyme.
• Protein stability is crucial for enzyme function and application.
• Synthetic affinity ligands offer a novel approach to modulate protein stability.

Purpose of the Study:

• To develop and assess synthetic triazine-scaffolded affinity ligands for enhancing cutinase stability.
• To identify ligands that bind specifically to regions involved in thermal unfolding.
• To evaluate the impact of ligand binding on enzyme activity and thermostability.

Main Methods:

• Solid-phase combinatorial and biased library synthesis of triazine-bisubstituted molecules.
• High-throughput screening using fluorescence-based assays and affinity chromatography.
• Thermostability assessment of cutinase bound to selected ligands at elevated temperatures and specific pH.
• Enzyme activity assays to evaluate functional retention.

Main Results:

• Selection of high-affinity ligands for cutinase using a semi-rational design approach.
• Demonstration that bound ligands exhibit varied effects on cutinase thermostability.
• Identification of specific synthetic ligands that significantly enhance enzyme stability.
• Observation of both stabilizing and destabilizing effects of ligands on enzyme activity.

Conclusions:

• Synthetic triazine-scaffolded affinity ligands can be tailored to modulate enzyme stability.
• Targeting surface regions involved in unfolding is a viable strategy for protein stabilization.
• This approach provides a novel tool for engineering protein stability for biotechnological applications.