Sequence-Selective Protection of Peptides from Proteolysis.

Area of Science:

• Biochemistry
• Nanotechnology
• Molecular Biology

Background:

• Proteolysis plays a key role in viral infections and cancer cell metastasis.
• Broad-specificity proteases are essential for normal cellular functions, making their inhibition challenging.
• Targeted inhibition of proteases is needed to avoid off-target effects.

Purpose of the Study:

• To develop a method for selective peptide protection against proteolysis using nanoparticle receptors.
• To demonstrate the versatility and generality of the developed method for various peptides and proteases.

Main Methods:

• Preparation of nanoparticle receptors using molecular imprinting technology.
• Utilizing the strong and selective binding of receptors to protect target peptide sequences.
• Testing the method's efficacy with hydrophobic and hydrophilic peptides, different proteases, and complex mixtures.

Main Results:

• Nanoparticle receptors successfully protected targeted peptide sequences from proteolysis in aqueous solutions.
• The method demonstrated generality by protecting diverse peptides (hydrophobic, hydrophilic) from various proteases.
• Selective protection of specific peptide segments and peptides within mixtures was achieved.
• Cooperative protection by two receptors targeting different parts of a long peptide was observed.

Conclusions:

• Molecular imprinting provides a versatile platform for creating nanoparticle receptors for selective peptide protection.
• This approach offers a promising strategy to control protease activity in biological contexts like viral infections and cancer.
• The ability to protect specific peptide sequences opens avenues for therapeutic interventions and biochemical research.