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Ullah A, Ul Haq M, Iqbal M, Irfan M, Khan S, Muhammad R, Ullah A, Khurram M, Alharbi M, Alasmari AF, Ahmad S. A computational quest for identifying potential vaccine candidates against Moraxella lacunata: a multi-pronged approach. J Biomol Struct Dyn 2024; 42:2976-2989. [PMID: 37177816 DOI: 10.1080/07391102.2023.2212793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 04/27/2023] [Indexed: 05/15/2023]
Abstract
Moraxella lacunata is an emerging gram-negative bacterium that is responsible for multiple nosocomial infections. The bacterium is evolving resistance to several antibiotics, and currently, no effective licensed vaccines are available, which warrants the search for new therapeutics. A multi-epitope-based vaccine has been designed for M. lacunata. The complete proteome of M. lacunata contains 10,110 core proteins. Subcellular localization analysis revealed the presence of five proteins in the extracellular matrix, while 19 proteins were predicted to be located in the outer membrane, and 21 proteins were predicted to be located in the periplasmic region. Only two proteins, the type VI secretion system tube protein (Hcp) and the transporter substrate-binding domain-containing protein, were selected for epitope prediction as they fulfilled all the criteria for being potential vaccine candidates. Shortlisted epitopes from the selected proteins were fused together using "GPGPG" linkers to overcome the limitations of single-epitope vaccines. Next, the cholera toxin-B adjuvant was attached to the peptide epitope using an EAAAK linker. Docking analysis was performed to examine the interaction between the vaccine and immune cell receptors, revealing robust intermolecular interactions and a stable binding conformation. Molecular dynamics simulation findings revealed no drastic changes in the binding conformation of complexes during the simulation period. The net binding free energy of vaccine-receptor complexes was estimated using the molecular mechanics energies combined with the Poisson-Boltzmann and surface area continuum solvation (MM-PBSA) method. The reported values were -586.38 kcal/mol, -283.74 kcal/mol, and -296.88 kcal/mol for the TLR-4-vaccine complex, MHC-I-vaccine complex, and MHC-II-vaccine complex, respectively. Furthermore, the molecular mechanics energies combined with the generalized Born and surface area continuum solvation (MM-GBSA) analysis predicted binding free energies of -596.69 kcal/mol, -287.39 kcal/mol, and -298.28 kcal/mol for the TLR-4-vaccine complex, MHC-I-vaccine complex, and MHC-II-vaccine complex, respectively. The theoretical vaccine design proposed in the study could potentially serve as a powerful therapeutic against targeted pathogens, subject to validation through experimental studies.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Asad Ullah
- Department of Health and Biological Sciences, Abasyn University, Peshawar, Pakistan
| | - Mahboob Ul Haq
- Department of Pharmacy, Abasyn University, Peshawar, Pakistan
| | - Madiha Iqbal
- Department of Health and Biological Sciences, Abasyn University, Peshawar, Pakistan
| | - Muhammad Irfan
- College of Dentistry, Department of Oral Biology, University of Florida, Gainesville, FL, USA
| | - Saifullah Khan
- Institute of Biotechnology and Microbiology, Bacha Khan University, Charsadda, Pakistan
| | - Riaz Muhammad
- Department of Health and Biological Sciences, Abasyn University, Peshawar, Pakistan
| | - Amin Ullah
- Department of Health and Biological Sciences, Abasyn University, Peshawar, Pakistan
| | | | - Metab Alharbi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Abdullah F Alasmari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Sajjad Ahmad
- Department of Health and Biological Sciences, Abasyn University, Peshawar, Pakistan
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Chen X, Xue B, Wahab S, Sultan A, Khalid M, Yang S. Structure-based molecular docking and molecular dynamics simulations study for the identification of dipeptidyl peptidase 4 inhibitors in type 2 diabetes. J Biomol Struct Dyn 2023:1-14. [PMID: 38100564 DOI: 10.1080/07391102.2023.2291831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 11/23/2023] [Indexed: 12/17/2023]
Abstract
Inhibition of dipeptidyl peptidase-4 (DPP4) activity has emerged as a promising therapeutic approach for the treatment of type 2 diabetes mellitus (T2DM). Bioinformatics-driven approaches have emerged as crucial tools in drug discovery. Molecular docking and molecular dynamics (MD) simulations are effective tools in drug discovery, as they reduce the time and cost associated with experimental screening. In this study, we employed structure-assisted in-silico methods, including molecular docking and MD simulations, to identify SRT2183, a small molecule that may potentially inhibit the activity of DPP4 enzyme. The interaction between the small molecule "SRT2183" and DPP4 exhibited a binding affinity of -9.9 Kcal/Mol, leading to the formation of hydrogen bonds with the amino acid residues MET348, SER376, and THR351 of DPP4. The MD simulations over a period of 100 ns indicated stable protein-ligand interactions, with no significant conformational rearrangements observed within the simulated timeframe. In conclusion, our results suggest that the small molecule SRT2183 may have the potential to inhibit the DPP4 enzyme and pave the way for the therapeutics of T2DM.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Xi Chen
- School of Management, Guangzhou College of Technology and Business, Guangzhou, China
| | - Bin Xue
- School of Engineering, Guangzhou College of Technology and Business, Guangzhou, China
| | - Shadma Wahab
- Department of Pharmacognosy, College of Pharmacy, King Khalid University, Abha, Saudi Arabia
| | - Armiya Sultan
- Department of Biotechnology, Jamia Millia Islamia, New Delhi, India
| | - Mohammad Khalid
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Alkharj, Saudi Arabia
| | - Song Yang
- Department of Wine, Food and Molecular Biosciences, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln, New Zealand
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Sultan A, Ali R, Ishrat R, Ali S. Anti-HIV and anti-HCV small molecule protease inhibitors in-silico repurposing against SARS-CoV-2 M pro for the treatment of COVID-19. J Biomol Struct Dyn 2022; 40:12848-12862. [PMID: 34569411 DOI: 10.1080/07391102.2021.1979097] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The COVID-19 pandemic is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). It is a global health emergency warranting development and implementation of targeted treatment. The enzyme main protease (Mpro; also known as 3C-like protease) is emerging as an attractive drug target. This enzyme plays an indispensable role in processing the translated polyproteins of viral RNA. Inhibiting the activity of Mpro would wedge viral replication. To facilitate the discovery of targeted therapy for COVID-19, we carried out the structure-assisted repurposing of existing protease inhibiting small molecules to target SARS-CoV-2 Mpro. Based on the structure of SARS-CoV-2 Mpro, here we report the small drug molecule namely saquinavir as its potent inhibitor. Findings support the premise that this promising antiviral protease inhibiting small drug molecule can be validated and implemented for the treatment and clinical management of COVID-19 pandemic disease.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Armiya Sultan
- Department of Biosciences, Jamia Millia Islamia (A Central University), New Delhi, India
| | - Rafat Ali
- Computational Laboratory, Center for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi, India
| | - Romana Ishrat
- Computational Laboratory, Center for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi, India
| | - Sher Ali
- Department of Life Sciences, Sharda University, Greater Noida, UP, India
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Boreak N, Bhandi S. In-Silico modulation of Interleukin-8 (IL8) for the therapeutic management of endodontic pulpitis. Saudi J Biol Sci 2022; 29:905-910. [PMID: 35197758 PMCID: PMC8848128 DOI: 10.1016/j.sjbs.2021.10.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 09/13/2021] [Accepted: 10/04/2021] [Indexed: 11/16/2022] Open
Abstract
Emerging clinical evidences highlight the association of Interleukin-8 (IL8) with endodontic pulpitis. Relatively higher expression of IL8 has been found in the pulp samples of pulpitis patients with moderate/severe pain. It is speculated that IL8 can be considered as a potential target for therapeutics of endodontic pulpitis. A library consisting of 3072 small molecules from the ZINC database was used to identify potential lead molecules with drug-like properties against the IL8. Based on the in-silico structure-assisted drug designing involving molecular docking, MD simulations, and MMPBSA analyses, we found a small molecule ZINC14613097 inhibits IL8. This study provides a new lead molecule than can be further validated in in-vitro, in-vivo, and ongoing clinical studies for the therapeutic management of endodontic pulpitis.
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