Developing Inhibitors of the p47phox-p22phox Protein-Protein Interaction by Fragment-Based Drug Discovery
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- Developing Inhibitors of the p47phox-p22phox Protein-Protein Interaction by Fragment-Based Drug Discovery_(proof_version)
Accepted author manuscript, 4.48 MB, PDF document
NADPH oxidase isoform 2 is an enzyme complex, which generates reactive oxygen species (ROS) and contributes to oxidative stress. The p47phox-p22phox interaction is critical for activation of the catalytical NOX2 domain, and p47phox is a potential target for therapeutic intervention. By screening 2,500 fragments using fluorescence polarization (FP) and a thermal shift assay (TSA) and validation by surface plasmon resonance (SPR) we found eight hits towards the tandem SH3 domain of p47phox (p47phoxSH3A-B) with KD values of 400-600 μM. Structural studies revealed that fragments 1 and 2 bound two separate binding sites in the elongated conformation of p47phoxSH3A-B and these competed with p22phox for binding to p47phoxSH3A-B. Chemical optimization led to a dimeric compound with the ability to potently inhibit the p47phoxSH3A-B-p22phox interaction (Ki of 20 μM). Thereby, we reveal a new way of targeting p47phox and present the first report of druglike molecules able to bind p47phox and inhibit its interaction with p22phox.
Original language | English |
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Journal | Journal of Medicinal Chemistry |
Volume | 63 |
Issue number | 3 |
Pages (from-to) | 1156-1177 |
ISSN | 0022-2623 |
DOIs | |
Publication status | Published - 2020 |
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