Site specific interactions of amino acids with (ZnO)12 cluster: Density functional approach

The Stability and electronic properties of bio-hybrid molecules are investigated in the framework of the first-principles density functional theory. The site-specific interactions between (ZnO)(12) nano-cluster and arginine/aspartic acid are investigated. There are partially ionic and covalent bonds between the interacting atoms, higher binding energy 8.86 eV is observed at -COOH site of arginine, and 7.60 eV at -CN site of aspartic acid during the interaction with a nano-cluster. Higher HOMO-LUMO gap 4.3 eV is found in arginine, and smaller 2.6 eV in a cluster, it becomes zero with -COOH site of arginine, and 0.8 eV at -CN site of aspartic acid during the formation of bio-hybrids, i.e. highly stable amino acids arg/asp-nano-cluster (ZnO)(12) bio-hybrids are formed with small forbidden energy-gap. This study will support in the formation of drugs which will improve the response in wound healing, immune functioning in burn injuries, and in the treatment of bone dysfunction. HIGHLIGHTS circle The binding energy is higher in a bio-hybrid at -COOH site of Arg, and -CN site of Asp. circle HOMO-LUMO gap is higher in a pristine Arg (4.3 eV), smaller in a cluster (2.6 eV), zero gap in a bio-hybrid with -COOH site of Arg, smaller 0.8 eV at -CN site of Asp. circle Higher binding energy is found with the small forbidden energy-gap of bio-hybrid molecules. circle This study will support in the formation of drugs which will improve the response in wound healing, immune functioning in burn injuries, and in the treatment of bone dysfunction.

Automated summary

In this study, the stability and electronic properties of bio-hybrid molecules were investigated using first-principles density functional theory. The interactions between a (ZnO) (12) nano-cluster and arginine/aspartic acid showed higher stability, providing insights for the development of drugs for wound healing and bone dysfunction treatment.