Tuning Active Site Electron Density for Enhanced Molecular Recognition and Catalysis

Area of Science:

• Biochemistry
• Materials Science
• Parasitology

Background:

• Enzymes leverage aromatic interactions for molecular recognition and catalysis.
• Parasitic infections like those caused by *Trypanosoma vivax* require targeted therapeutic strategies.
• Developing artificial systems to mimic enzymatic functions is crucial for various applications.

Purpose of the Study:

• To design and synthesize molecularly imprinted nanoparticle receptors utilizing aromatic interactions.
• To enhance the molecular recognition of aromatic guests based on subtle differences in π-electron density.
• To mimic the catalytic activity of nucleoside hydrolase from *Trypanosoma vivax*.

Main Methods:

• Fabrication of nanoparticle receptors with aromatic "wall" materials in the imprinted binding site.
• Utilizing π-π stacking and other aromatic interactions for selective guest binding.
• Employing aromatic interactions to activate an electron-rich aryl leaving group on a glycoside substrate.

Main Results:

• Demonstrated enhanced molecular recognition of aromatic guests with similar physicochemical properties but varying π-electron densities.
• Successfully mimicked the catalytic mechanism of nucleoside hydrolase using the designed nanoparticle receptors.
• Showcased the potential of aromatic interactions in designing artificial enzymes.

Conclusions:

• Molecularly imprinted nanoparticles with aromatic walls are effective for selective molecular recognition.
• Aromatic interactions can be strategically employed to mimic enzymatic catalysis.
• This approach offers a promising avenue for developing biosensors and therapeutic agents targeting parasitic enzymes.