Structure/activity virtual screening and in vitro testing of small molecule inhibitors of 8-hydroxy-5-deazaflavin:NADPH oxidoreductase from gut methanogenic bacteria
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Medientyp:
E-Artikel
Titel:
Structure/activity virtual screening and in vitro testing of small molecule inhibitors of 8-hydroxy-5-deazaflavin:NADPH oxidoreductase from gut methanogenic bacteria
Erschienen:
Springer Science and Business Media LLC, 2020
Erschienen in:Scientific Reports
Sprache:
Englisch
DOI:
10.1038/s41598-020-70042-w
ISSN:
2045-2322
Entstehung:
Anmerkungen:
Beschreibung:
<jats:title>Abstract</jats:title><jats:p>Virtual screening techniques and in vitro binding/inhibitory assays were used to search within a set of more than 8,000 naturally occurring small ligands for candidate inhibitors of 8-hydroxy-5-deazaflavin:NADPH oxidoreductase (FNO) from <jats:italic>Methanobrevibacter smithii</jats:italic>, the enzyme that catalyses the bidirectional electron transfer between NADP<jats:sup>+</jats:sup> and F420H<jats:sub>2</jats:sub> during the intestinal production of CH<jats:sub>4</jats:sub> from CO<jats:sub>2</jats:sub>. In silico screening using molecular docking classified the ligand-enzyme complexes in the range between − 4.9 and − 10.5 kcal/mol. Molecular flexibility, the number of H-bond acceptors and donors, the extent of hydrophobic interactions, and the exposure to the solvent were the major discriminants in determining the affinity of the ligands for FNO. In vitro studies on a group of these ligands selected from the most populated/representative clusters provided quantitative kinetic, equilibrium, and structural information on ligands’ behaviour, in optimal agreement with the predictive computational results.</jats:p>