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On interaction of arginine, cysteine and guanine with a nano-TiO2 cluster.

Abstract：

:Nanoscopic properties of TiO2 augmented with its physicochemical properties and biocompatibility make it a material interest in the biomedical field. Efficient methods to design of such materials require a thorough understanding of associated nano-bio interfaces. In the present study, density functional theory calculations were performed to study the interactions of arginine, cysteine and guanine with a nano-TiO2 cluster. Different configurations were sampled for the adsorption of arginine, cysteine and guanine to probe the nano-bio interface via the interaction of various functional groups present on biomolecules. Adsorption energies for arginine, cysteine and guanine were in a range of -25.0 to -57.6, -12.1 to -29.6 and -45.6 to -58.7 kcal/mol, respectively. From the change in adsorption energies and free energies, interaction of amino acids with carboxylic (COOH), thiol (SH) and amine (NH2) groups while the interaction of the nucleobase via O bonded to C and N of purine ring was found to be essential for thermodynamically stable and energetically favorable states. Density of states analysis also disclosed the prominent interactions of the biomolecules with the nano-TiO2 cluster. Decrease in band gaps on adsorption of the biomolecules was a pertinent phenomenon indicating the strong chemical interactions of the biomolecules with the nanoscopic TiO2 chosen for analysis in this study.

journal_name

Comput Biol Chem

journal_title

Computational biology and chemistry

authors

Sai Phani Kumar V,Verma M,Deshpande PA

doi

10.1016/j.compbiolchem.2020.107236

subject

Has Abstract

pub_date

2020-06-01 00:00:00

pages

107236

eissn

1476-9271

issn

1476-928X

pii

S1476-9271(19)30935-1

journal_volume

86

pub_type

杂志文章

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