Abstract
This study aims to determine UV-B resistance and to investigate computational analysis and antioxidant potential of methoxy-flavones of Micromonospora aurantiaca TMC-15 isolated from Thal Desert, Pakistan. The cellular extract was purified through solid-phase extraction and UV–Vis spectrum analysis indicated absorption peaks at λmax 250 nm, 343 nm, and 380 nm that revealed the presence of methoxy-flavones named eupatilin and 5-hydroxyauranetin. The flavones were evaluated for their antioxidant as well as protein and lipid peroxidation inhibition potential using di(phenyl)-(2,4,6-trinitrophenyl) iminoazanium (DPPH), 2,4-dinitrophenyl hydrazine (DNPH), and thiobarbituric acid reactive substances (TBARS) assays, respectively. The methoxy-flavones were further studied for their docking affinity and interaction dynamics to determine their structural and energetic properties at the atomic level. The antioxidant potential, protein, and lipid oxidation inhibition and DNA damage preventive abilities were correlated as predicted by computational analysis. The eupatilin and 5-hydroxyauranetin binding potential to their targeted proteins 1N8Q and 1OG5 is − 4.1 and − 7.5 kcal/mol, respectively. Moreover, the eupatiline and 5-hydroxyauranetin complexes illustrate van der Waals contacts and strong hydrogen bonds to their respective enzymes target. Both in vitro studies and computational analysis results revealed that methoxy-flavones of Micromonospora aurantiaca TMC-15 can be used against radiation-mediated oxidative damages due to its kosmotrophic nature. The demonstration of good antioxidant activities not only protect DNA but also protein and lipid oxidation and therefore could be a good candidate in radioprotective drugs and as sunscreen due to its kosmotropic nature.
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We acknowledge Higher Education Commission of Pakistan for the provision of funds to conduct this study.
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W. S., M. N., T. A., and A. A. S.: preparation of the overall research plan as well as protocols for various experiments; W. S., M. N., A. R.: performed experimental work in lab as per the pre-designed research plan; G. D., F. H., S. K., M. B., and S. G.: facilitated in interpretation of various bioassay and phylogenetic analysis in the current research project; S. W. A. and S. A.: contributed in docking and simulation analysis; M. F.: analysis of samples through LC–MS and interpretation of LC–MS data; W. S., M. N., A. R., A. A. S.: write up of the manuscript; A. A. S., F. H., S. K., M. B., S. G.: proofreading of the overall manuscript for English comprehension and typing mistakes.
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Sajjad, W., Nadeem, M., Alam, T. et al. Biological Evaluation and Computational Studies of Methoxy-flavones from Newly Isolated Radioresistant Micromonospora aurantiaca Strain TMC-15. Appl Biochem Biotechnol 195, 4915–4935 (2023). https://doi.org/10.1007/s12010-023-04517-7
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DOI: https://doi.org/10.1007/s12010-023-04517-7