Protein stabilization with a dipeptide-mimic triazine-scaffolded synthetic affinity ligand

Area of Science:

• Biochemistry
• Materials Science

Background:

• Protein stability is crucial for enzymatic applications.
• Developing methods for protein stabilization remains a significant challenge in biotechnology.

Purpose of the Study:

• To investigate a novel approach for protein stabilization using affinity-like interactions.
• To evaluate the effectiveness of a biomimetic triazine-scaffolded ligand for stabilizing cutinase.

Main Methods:

• A synthetic triazine-scaffolded ligand (ligand 3'/11) was synthesized.
• The ligand was immobilized on an agarose matrix using solid-phase synthesis.
• The binding affinity and stabilization effect on cutinase were assessed at different temperatures.

Main Results:

• Ligand 3'/11 demonstrated strong binding to cutinase (K(a) ≈ 10(4) M(-1)).
• Immobilized cutinase exhibited significantly increased half-lives: >8 h at 70 °C and ~34 h at 60 °C.
• A 25-fold and 57-fold increase in half-life was observed compared to the free enzyme at 70 °C and 60 °C, respectively.
• Ligand density in the matrix was identified as a key factor for stabilization.

Conclusions:

• Biomimetic ligand adsorption provides an effective strategy for protein stabilization.
• The observed stabilization is attributed to multi-residue binding, restricting enzyme mobility.
• This method offers a promising avenue for enhancing enzyme stability in various applications.