Allosteric Inhibition of Neutral Sphingomyelinase 2 (nSMase2) by DPTIP: From Antiflaviviral Activity to Deciphering Its Binding Site through In Silico Studies and Experimental Validation
Abstract
:1. Introduction
2. Results and Discussion
2.1. Antiviral Activity of DPTIP
2.2. Modelling of the Missing Loops of nSMase2 Structure and Cavity Probing
2.3. Binding Mode of DPTIP: Docking Studies and Molecular Dynamics Simulations
2.4. nSMase2 Inhibition Assay
3. Materials and Methods
3.1. DPTIP
3.2. Virus Infections and Drug Treatments
3.3. Production of Recombinant nSMase2
3.4. nSMase2 3D Model: Modelling, Docking and Molecular Dynamics Simulations
3.4.1. Protein Model
3.4.2. Binding Site Prediction
3.4.3. Docking
3.4.4. Molecular Dynamics Simulations
3.5. Fluorescence-Based nSMase2 Activity Assay
3.6. Data Analysis
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Conflicts of Interest
References
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Pocket. | Volume | Druggability Score | Hydrophobicity Score | Location |
---|---|---|---|---|
1 | 321 | 0.104 | 40 | Adjacent to active site and to DK switch |
2 | 1000 | 0.168 | 29 | Adjacent to active site |
3 | 1618 | 0.820 | 22 | Adjacent to active site. Includes DK switch |
Compound | Structure | IC50 (µM) |
---|---|---|
DPTIP (6) | 0.03 a | |
7 | >100 a | |
8 | >100 a | |
9 | 40 a | |
10 | 0.12 a | |
11 | 0.52 a |
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Álvarez-Fernández, H.; Mingo-Casas, P.; Blázquez, A.-B.; Caridi, F.; Saiz, J.C.; Pérez-Pérez, M.-J.; Martín-Acebes, M.A.; Priego, E.-M. Allosteric Inhibition of Neutral Sphingomyelinase 2 (nSMase2) by DPTIP: From Antiflaviviral Activity to Deciphering Its Binding Site through In Silico Studies and Experimental Validation. Int. J. Mol. Sci. 2022, 23, 13935. https://doi.org/10.3390/ijms232213935
Álvarez-Fernández H, Mingo-Casas P, Blázquez A-B, Caridi F, Saiz JC, Pérez-Pérez M-J, Martín-Acebes MA, Priego E-M. Allosteric Inhibition of Neutral Sphingomyelinase 2 (nSMase2) by DPTIP: From Antiflaviviral Activity to Deciphering Its Binding Site through In Silico Studies and Experimental Validation. International Journal of Molecular Sciences. 2022; 23(22):13935. https://doi.org/10.3390/ijms232213935
Chicago/Turabian StyleÁlvarez-Fernández, Hadrián, Patricia Mingo-Casas, Ana-Belén Blázquez, Flavia Caridi, Juan Carlos Saiz, María-Jesús Pérez-Pérez, Miguel A. Martín-Acebes, and Eva-María Priego. 2022. "Allosteric Inhibition of Neutral Sphingomyelinase 2 (nSMase2) by DPTIP: From Antiflaviviral Activity to Deciphering Its Binding Site through In Silico Studies and Experimental Validation" International Journal of Molecular Sciences 23, no. 22: 13935. https://doi.org/10.3390/ijms232213935