Decoding the Structural Impact of Shape-Engineered Copper Nanoclusters on Lysozyme

Area of Science:

• Materials Science
• Biophysics
• Computational Chemistry

Background:

• Copper nanoclusters (CuNCs) are crucial for biomedical applications like drug delivery and bioimaging.
• Protein-nanomaterial interactions are influenced by the size and shape of nanoclusters.
• Understanding these interactions is key for designing effective nanomaterials.

Purpose of the Study:

• To investigate the stability of copper nanocluster-lysozyme complexes using molecular dynamics (MD) simulations.
• To determine how nanocluster geometry affects protein-nanomaterial binding and stability.
• To provide insights for the rational design of CuNC-based systems for biomedical use.

Main Methods:

• Molecular dynamics (MD) simulations were used to study lysozyme stability in water with various force fields.
• Different geometries of CuNCs were docked onto lysozyme.
• MD simulations were performed on the resulting CuNC-lysozyme complexes to assess stability.

Main Results:

• Lysozyme's structural stability is dependent on the chosen force field, with AMBER99SB-ILDN showing the best results.
• The icosahedral CuNC-lysozyme complex demonstrated the highest stability.
• Both the protein and the icosahedral nanocluster maintained their structures during simulations.

Conclusions:

• Nanocluster geometry is a critical factor in the stability of protein-nanomaterial assemblies.
• The icosahedral geometry of CuNCs leads to more stable complexes with proteins.
• These findings are valuable for designing advanced CuNC-based nanomaterials for biomedical applications.