Random heteropolymers as enzyme mimics

Area of Science:

• Synthetic chemistry
• Biomimetic materials
• Enzyme catalysis

Background:

• Replicating protein structure is achievable, but mimicking complex protein functions remains a challenge.
• Protein functions rely on intricate chemical, structural, and dynamic heterogeneities.
• Existing synthetic approaches struggle to capture the full functional repertoire of natural enzymes.

Purpose of the Study:

• To design synthetic polymers that replicate protein functions, specifically enzyme activity.
• To explore random heteropolymers (RHPs) as a platform for creating artificial enzymes.
• To investigate methods for programming polymer sidechain behavior to achieve enzyme-like catalysis.

Main Methods:

• Analysis of approximately 1,300 metalloprotein active sites to guide design.
• One-pot synthesis of random heteropolymers (RHPs).
• Introduction of key monomers mimicking functional protein residues and statistical modulation of segmental properties like hydrophobicity.

Main Results:

• RHPs formed pseudo-active sites with protein-like microenvironments for catalytic monomers.
• Successful catalysis of oxidation and cyclization reactions (e.g., citronellal to isopulegol/menthoglycol).
• Demonstrated ability to degrade the persistent antibiotic tetracycline, expanding substrate scope.

Conclusions:

• Random heteropolymers can effectively mimic enzyme functions through programmed sidechain arrangements.
• These synthetic enzyme mimics exhibit stability under non-biological conditions and compatibility with scalable processing.
• The RHP approach offers a versatile strategy for developing artificial enzymes with broad applications, including environmental remediation.