Colloidal stability versus self-assembly of nanoparticles controlled by coiled-coil protein interactions

Area of Science:

• Biochemistry
• Materials Science
• Nanotechnology

Background:

• Biomolecular recognition is crucial for molecular interactions.
• Controlling nanoparticle self-assembly and stability is essential for various applications.
• Coiled-coils are protein structures known for their specific binding properties.

Purpose of the Study:

• To utilize orientational discrimination of biomolecular recognition as a tool for nanoparticle engineering.
• To investigate the effect of coiled-coil orientation on nanoparticle self-assembly and colloidal stability.

Main Methods:

• Conjugating nanoparticles with heterodimerizing coiled-coils (A and B).
• Manipulating the orientation of one coiled-coil (A or B) relative to the other.
• Observing the self-assembly or colloidal stability of the modified nanoparticles.

Main Results:

• Nanoparticles conjugated with parallel-oriented coiled-coils A and B exhibit controlled behavior.
• Flipping the orientation of one coiled-coil component leads to distinct outcomes: either nanoparticle self-assembly or enhanced colloidal stability.
• Demonstrated a direct correlation between coiled-coil orientation and nanoparticle fate.

Conclusions:

• Orientational discrimination of biomolecular recognition provides a precise method for controlling nanoparticle self-assembly and stability.
• This approach offers a versatile molecular engineering strategy for designing functional nanoparticle systems.
• The findings open avenues for developing novel nanomaterials with tunable properties.