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Oladipo SD, Zamisa SJ, Badeji AA, Ejalonibu MA, Adeleke AA, Lawal IA, Henni A, Lawal MM. Ni 2+ and Cu 2+ complexes of N-(2,6-dichlorophenyl)-N-mesityl formamidine dithiocarbamate structural and functional properties as CYP3A4 potential substrates. Sci Rep 2023; 13:13414. [PMID: 37591990 PMCID: PMC10435461 DOI: 10.1038/s41598-023-39502-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 07/26/2023] [Indexed: 08/19/2023] Open
Abstract
Metal compounds continued to attract diverse applications due to their malleability in several capacities. In this study, we present our findings on the crystal structures and functional properties of Ni2+ and Cu2+ complexes of N'-(2,6-dichlorophenyl)-N-mesitylformamidine dithiocarbamate (L) comprising [Ni-(L)2] (1) and [Cu-(L)2] (2) with a four-coordinate metal center. We established the two complex structures through 1H and 13C nuclear magnetic resonance (NMR), elemental, and single-crystal X-ray analysis. The analyses showed that the two complexes are isomorphous, having P21/c as a space group and a unit-cell similarity index (π) of 0.002. The two complexes conform to a distorted square planar geometry around the metal centers. The calculated and experimental data, including bond lengths, angles, and NMR values, are similar. Hirshfeld surface analysis revealed the variational contribution of the different types of intermolecular contacts driven by the crystal lattice of the two solvated complexes. Our knowledge of the potential biological implication of these structures enabled us to probe the compounds as prospective CYP3A4 inhibitors. This approach mimics current trends in pharmaceutical design and biomedicine by incorporating potentially active molecules into various media to predict their biological efficacies. The simulations show appreciable binding of compounds 1 and 2 to CYP3A4 with average interaction energies of -97 and -87 kcal/mol, respectively. The protein attains at least five conformational states in the three studied models using a Gaussian Mixture Model-based clustering and free energy prediction. Electric field analysis shows the crucial residues to substrate binding at the active site, enabling CYP3A4 structure to function prediction. The predicted inhibition with these Ni2+ and Cu2+ complexes indicates that CYP3A4 overexpression in a diseased state like cancer would reduce, thereby increasing the chemotherapeutic compounds' shelf-lives for adsorption. This multidimensional study addresses various aspects of molecular metal electronics, including their application as substrate-mimicking inhibitors. The outcome would enable further research on bio-metal compounds of critical potential.
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Affiliation(s)
- Segun D Oladipo
- Department of Chemical Sciences, Olabisi Onabanjo University, P.M.B 2002, Ago-Iwoye, Nigeria.
- School of Chemistry and Physics, Westville Campus, University of KwaZulu-Natal, Private Bag X54001, Durban, 4000, South Africa.
| | - Sizwe J Zamisa
- School of Chemistry and Physics, Westville Campus, University of KwaZulu-Natal, Private Bag X54001, Durban, 4000, South Africa
| | - Abosede A Badeji
- Department of Chemical Sciences, Tai Solarin University of Education, Ogun State, Ijagun, Nigeria
| | - Murtala A Ejalonibu
- Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban, 4000, South Africa
| | - Adesola A Adeleke
- Department of Chemical Sciences, Olabisi Onabanjo University, P.M.B 2002, Ago-Iwoye, Nigeria
| | - Isiaka A Lawal
- Faculty of Engineering and Applied Science, University of Regina, 3737 Wascana Parkway, Regina, SK, S4S 0A2, Canada
| | - Amr Henni
- Faculty of Engineering and Applied Science, University of Regina, 3737 Wascana Parkway, Regina, SK, S4S 0A2, Canada
| | - Monsurat M Lawal
- Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban, 4000, South Africa.
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Alimardan Z, Abbasi M, Hasanzadeh F, Aghaei M, Khodarahmi G, Kashfi K. Heat shock proteins and cancer: The FoxM1 connection. Biochem Pharmacol 2023; 211:115505. [PMID: 36931349 PMCID: PMC10134075 DOI: 10.1016/j.bcp.2023.115505] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 03/09/2023] [Accepted: 03/10/2023] [Indexed: 03/17/2023]
Abstract
Heat shock proteins (Hsp) and FoxM1 have significant roles in carcinogenesis. According to their relative molecular weight, Hsps are divided into Hsp110, Hsp90, Hsp70, Hsp60, Hsp40, and small Hsps. Hsp70 can play essential functions in cancer initiation and is overexpressed in several human cancers. Hsp70, in combination with cochaperones HIP and HOP, refolds partially denatured proteins and acts as a cochaperone for Hsp90. Also, Hsp70, in combination with BAG3, regulates the FoxM1 signaling pathway. FoxM1 protein is a transcription factor of the Forkhead family that is overexpressed in most human cancers and is involved in many cancers' development features, including proliferation, migration, invasion, angiogenesis, metastasis, and resistance to apoptosis. This review discusses the Hsp70, Hsp90, and FoxM1 structure and function, the known Hsp70 cochaperones, and Hsp70, Hsp90, and FoxM1 inhibitors.
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Affiliation(s)
- Zahra Alimardan
- Department of Medicinal Chemistry, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Pharmacology, School of Medicine, Arak University of Medical Sciences, Arak, Iran
| | - Maryam Abbasi
- Department of Medicinal Chemistry, Faculty of Pharmacy, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Farshid Hasanzadeh
- Department of Medicinal Chemistry, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mahmud Aghaei
- Department of Biochemistry, Faculty of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ghadamali Khodarahmi
- Department of Medicinal Chemistry, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran; Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Khosrow Kashfi
- Department of Molecular, Cellular and Biomedical Sciences, Sophie Davis School of Biomedical Education, City University of New York School of Medicine, New York, NY, USA; Graduate Program in Biology, City University of New York Graduate Center, NY, USA.
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Heat Shock Protein 90 (HSP90) Inhibitors as Anticancer Medicines: A Review on the Computer-Aided Drug Discovery Approaches over the Past Five Years. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:2147763. [PMID: 35685897 PMCID: PMC9173959 DOI: 10.1155/2022/2147763] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 05/08/2022] [Accepted: 05/19/2022] [Indexed: 12/24/2022]
Abstract
Cancer is a disease caused by the uncontrolled, abnormal growth of cells in different anatomic sites. In 2018, it was predicted that the worldwide cancer burden would rise to 18.1 million new cases and 9.6 million deaths. Anticancer compounds, often known as chemotherapeutic medicines, have gained much interest in recent cancer research. These medicines work through various biological processes in targeting cells at various stages of the cell's life cycle. One of the most significant roadblocks to developing anticancer drugs is that traditional chemotherapy affects normal cells and cancer cells, resulting in substantial side effects. Recently, advancements in new drug development methodologies and the prediction of the targeted interatomic and intermolecular ligand interaction sites have been beneficial. This has prompted further research into developing and discovering novel chemical species as preferred therapeutic compounds against specific cancer types. Identifying new drug molecules with high selectivity and specificity for cancer is a prerequisite in the treatment and management of the disease. The overexpression of HSP90 occurs in patients with cancer, and the HSP90 triggers unstable harmful kinase functions, which enhance carcinogenesis. Therefore, the development of potent HSP90 inhibitors with high selectivity and specificity becomes very imperative. The activities of HSP90 as chaperones and cochaperones are complex due to the conformational dynamism, and this could be one of the reasons why no HSP90 drugs have made it beyond the clinical trials. Nevertheless, HSP90 modulations appear to be preferred due to the competitive inhibition of the targeted N-terminal adenosine triphosphate pocket. This study, therefore, presents an overview of the various computational models implored in the development of HSP90 inhibitors as anticancer medicines. We hereby suggest an extensive investigation of advanced computational modelling of the three different domains of HSP90 for potent, effective inhibitor design with minimal off-target effects.
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Ndagi U, Abdullahi M, Hamza AN, Magaji MG, Mhlongo NN, Babazhitsu M, Majiya H, Makun HA, Lawal MM. Impact of Drug Repurposing on SARS-Cov-2 Main Protease. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022; 96. [PMCID: PMC10036164 DOI: 10.1134/s0036024423030299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
The recent emergence of the severe acute respiratory disease caused by a novel coronavirus remains a concern posing many challenges to public health and the global economy. The resolved crystal structure of the main protease of SARS-CoV-2 or SCV2 (Mpro) has led to its identification as an attractive target for designing potent antiviral drugs. Herein, we provide a comparative molecular impact of hydroxychloroquine (HCQ), remdesivir, and β-D-N4-Hydroxycytidine (NHC) binding on SCV2 Mpro using various computational approaches like molecular docking and molecular dynamics (MD) simulation. Data analyses showed that HCQ, remdesivir, and NHC binding to SARS-CoV-2 Mpro decrease the protease loop capacity to fluctuate. These binding influences the drugs’ optimum orientation in the conformational space of SCV2 Mpro and produce noticeable steric effects on the interactive residues. An increased hydrogen bond formation was observed in SCV2 Mpro–NHC complex with a decreased receptor residence time during NHC binding. The binding mode of remdesivir to SCV2 Mpro differs from other drugs having van der Waals interaction as the force stabilizing protein–remdesivir complex. Electrostatic interaction dominates in the SCV2 Mpro−HCQ and SCV2 Mpro–NHC. Residue Glu166 was highly involved in the stability of remdesivir and NHC binding at the SCV2 Mpro active site, while Asp187 provides stability for HCQ binding.
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Affiliation(s)
- Umar Ndagi
- Africa Centre of Excellence for Mycotoxin and Food Safety, Federal University of Technology, Minna, Nigeria
| | - Maryam Abdullahi
- Faculty of Pharmaceutical Sciences, Ahmadu Bello University, Zaria, Kaduna State, Nigeria
| | - Asmau N. Hamza
- Faculty of Pharmaceutical Sciences, Ahmadu Bello University, Zaria, Kaduna State, Nigeria
| | - Mohd G. Magaji
- Faculty of Pharmaceutical Sciences, Ahmadu Bello University, Zaria, Kaduna State, Nigeria
| | - Ndumiso N. Mhlongo
- Department of Medical Biochemistry, School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, 4001 Durban, South Africa
| | - Makun Babazhitsu
- Department of Medical Microbiology and Parasitology, Faculty of Basic Clinical Sciences, College of Health Sciences, Usman Danfodio University, Sokoto, Nigeria
| | - Hussaini Majiya
- Department of Microbiology, Ibrahim Badamasi Babangida University, Lapai, Niger State, Nigeria
| | - Hussaini Anthony Makun
- Africa Centre of Excellence for Mycotoxin and Food Safety, Federal University of Technology, Minna, Nigeria
| | - Monsurat M. Lawal
- Department of Medical Biochemistry, School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, 4001 Durban, South Africa
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Magwenyane AM, Lawal MM, Amoako DG, Somboro AM, Agoni C, Khan RB, Mhlongo NN, Kumalo HM. Exploring the inhibitory mechanism of resorcinylic isoxazole amine NVP-AUY922 towards the discovery of potential heat shock protein 90 (Hsp90) inhibitors. SCIENTIFIC AFRICAN 2022. [DOI: 10.1016/j.sciaf.2022.e01107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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6
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Piven YA, Scherbakov AM, Yastrebova MA, Sorokin DV, Shchegolev YY, Matous AE, Zinovich VG, Khlebnicova TS, Lakhvich FA. Effective synthesis of novel dihydrobenzisoxazoles bearing the 2-aminothiazole moiety and evaluation of the antiproliferative activity of their acylated derivatives. Org Biomol Chem 2021; 19:10432-10443. [PMID: 34846407 DOI: 10.1039/d1ob01614h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An effective method for the synthesis of 8-aryl-4,5-dihydrothiazolo[4',5':3,4]benzo[1,2-c]isoxazol-2-amines was developed. This method includes the α-keto bromination of 3-aryl-6,7-dihydrobenzo[c]isoxazol-4(5H)-ones followed by the condensation of the obtained bromo derivatives with thiourea in acetonitrile. Using virtual screening, a series of acylated derivatives of the obtained compounds were selected as potential HSP90 inhibitors. These compounds were prepared and evaluated as antiproliferative agents against three cancer cell lines (A431, 22Rv1, and MCF-7). Compounds 8b, 8c and 8q exhibiting high antiproliferative potency against MCF-7 breast cancer cells with IC50 values ranging from 2.3 to 9.5 μM were chosen for in-depth evaluation. The selected compounds had remarkable effects on HSP90 client proteins, including steroid hormone receptors and the anti-apoptotic factor BCL2. The obtained compounds are of interest for anticancer drug development.
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Affiliation(s)
- Yuri A Piven
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Akad. Kuprevicha st. 5/2, Minsk 220141, Belarus.
| | - Alexander M Scherbakov
- Department of Experimental Tumor Biology, Blokhin N.N. National Medical Research Center of Oncology, Kashirskoye sh. 24, Moscow 115522, Russian Federation
| | - Margarita A Yastrebova
- Institute of Gene Biology, Russian Academy of Sciences, Vavilova st. 34/5, Moscow 119334, Russian Federation
| | - Danila V Sorokin
- Department of Experimental Tumor Biology, Blokhin N.N. National Medical Research Center of Oncology, Kashirskoye sh. 24, Moscow 115522, Russian Federation
| | - Yuri Yu Shchegolev
- Department of Experimental Tumor Biology, Blokhin N.N. National Medical Research Center of Oncology, Kashirskoye sh. 24, Moscow 115522, Russian Federation
| | - Anton E Matous
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Akad. Kuprevicha st. 5/2, Minsk 220141, Belarus.
| | - Veronica G Zinovich
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Akad. Kuprevicha st. 5/2, Minsk 220141, Belarus.
| | - Tatyana S Khlebnicova
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Akad. Kuprevicha st. 5/2, Minsk 220141, Belarus.
| | - Fedor A Lakhvich
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Akad. Kuprevicha st. 5/2, Minsk 220141, Belarus.
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Stofberg ML, Caillet C, de Villiers M, Zininga T. Inhibitors of the Plasmodium falciparum Hsp90 towards Selective Antimalarial Drug Design: The Past, Present and Future. Cells 2021; 10:2849. [PMID: 34831072 PMCID: PMC8616389 DOI: 10.3390/cells10112849] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 10/14/2021] [Accepted: 10/15/2021] [Indexed: 12/12/2022] Open
Abstract
Malaria is still one of the major killer parasitic diseases in tropical settings, posing a public health threat. The development of antimalarial drug resistance is reversing the gains made in attempts to control the disease. The parasite leads a complex life cycle that has adapted to outwit almost all known antimalarial drugs to date, including the first line of treatment, artesunate. There is a high unmet need to develop new strategies and identify novel therapeutics to reverse antimalarial drug resistance development. Among the strategies, here we focus and discuss the merits of the development of antimalarials targeting the Heat shock protein 90 (Hsp90) due to the central role it plays in protein quality control.
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Affiliation(s)
| | | | | | - Tawanda Zininga
- Department of Biochemistry, Stellenbosch University, Stellenbosch 7600, South Africa; (M.L.S.); (C.C.); (M.d.V.)
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8
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Yusuf T, Oladipo SD, Zamisa S, Kumalo HM, Lawal IA, Lawal MM, Mabuba N. Design of New Schiff-Base Copper(II) Complexes: Synthesis, Crystal Structures, DFT Study, and Binding Potency toward Cytochrome P450 3A4. ACS OMEGA 2021; 6:13704-13718. [PMID: 34095663 PMCID: PMC8173565 DOI: 10.1021/acsomega.1c00906] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 04/07/2021] [Indexed: 06/01/2023]
Abstract
We report the synthesis and crystal structures of three new copper(II) Schiff-base complexes. The complexes have been characterized by elemental analysis and Fourier transform infrared (FT-IR) and UV-visible spectroscopies. The X-ray diffraction (XRD) analysis reveals that complexes 1 and 3 crystallize in a monoclinic space group C2/c and 2 in a triclinic space group P1̅, each adopting a square planar geometry around the metal center. We use a density functional theory method to explore the quantum chemical properties of these complexes. The calculation proceeds with the three-dimensional (3D) crystal structure characterization of the complexes in which the calculated IR and UV-vis values are comparable to the experimental results. Charge distribution and molecular orbital analyses enabled quantum chemical property prediction of these complexes. We study the drug-likeness properties and binding potentials of the synthesized complexes. The in silico outcome showed that they could serve as permeability-glycoprotein (P-gp) and different cytochrome P450 substrates. Our calculations showed that the complexes significantly bind to cytochrome P450 3A4.
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Affiliation(s)
- Tunde
L. Yusuf
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein, P.O.
Box 17011, Johannesburg 2028, South Africa
| | - Segun D. Oladipo
- Department
of Chemical Sciences, Olabisi Onabanjo University, P. M. B., 2002 Ago-Iwoye, Nigeria
| | - Sizwe Zamisa
- School
of Chemistry and Physics, University of
KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa
| | - Hezekiel M. Kumalo
- Discipline
of Medical Biochemistry, School of Laboratory Medicine and Medical
Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South
Africa
| | - Isiaka A. Lawal
- Chemistry
Department, Faculty of Applied and Computer Science, Vaal University of Technology, Vanderbijlpark Campus, Boulevard, 1900 Vanderbijlpark, South Africa
| | - Monsurat M. Lawal
- Discipline
of Medical Biochemistry, School of Laboratory Medicine and Medical
Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South
Africa
| | - Nonhlangabezo Mabuba
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein, P.O.
Box 17011, Johannesburg 2028, South Africa
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Li W, Shrivastava M, Lu H, Jiang Y. Calcium-calcineurin signaling pathway in Candida albicans: A potential drug target. Microbiol Res 2021; 249:126786. [PMID: 33989979 DOI: 10.1016/j.micres.2021.126786] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 04/27/2021] [Accepted: 05/03/2021] [Indexed: 12/26/2022]
Abstract
Increased morbidity and mortality of candidiasis are a notable threat to the immunocompromised patients. At present, the types of drugs available to treat C. albicans infection are relatively limited. Moreover, the emergence of antifungal drug resistance of C. albicans makes the treatment of C. albicans infection more difficult. The calcium-calcineurin signaling pathway plays a crucial role in the survival and pathogenicity of C. albicans and may act as a potential target against C. albicans. In this review, we summarized functions of the calcium-calcineurin signaling pathway in several biological processes, compared the differences of this signaling pathway between C. albicans and humans, and described anti-C. albicans activity of inhibitors of this signaling pathway. We believe that targeting the calcium-calcineurin signaling pathway is a promising strategy to cope with C. albicans infection.
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Affiliation(s)
- Wanqian Li
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | | | - Hui Lu
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.
| | - Yuanying Jiang
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.
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Ugbaja SC, Sanusi ZK, Appiah-Kubi P, Lawal MM, Kumalo HM. Computational modelling of potent β-secretase (BACE1) inhibitors towards Alzheimer's disease treatment. Biophys Chem 2020; 270:106536. [PMID: 33387910 DOI: 10.1016/j.bpc.2020.106536] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/20/2020] [Accepted: 12/21/2020] [Indexed: 12/28/2022]
Abstract
Researchers have identified the β-amyloid precursor protein cleaving enzyme 1 (BACE1) in the multifactorial pathway of Alzheimer's disease (AD) as a drug target. The design and development of molecules to inhibit BACE1 as a potential cure for AD thus remained significant. Herein, we simulated two potent BACE1 inhibitors (AM-6494 and CNP-520) to understand their binding affinity at the atomistic level. AM-6494 is a newly reported potent BACE1 inhibitor with an IC50 value of 0.4 nM in vivo and now picked for preclinical considerations. Umibecestat (CNP-520), which was discontinued at human trials lately, was considered to enable a reasonable evaluation of our results. Using density functional theory (DFT) and Our Own N-layered Integrated molecular Orbital and Molecular Mechanics (ONIOM), we achieved the aim of this investigation. These computational approaches enabled the prediction of the electronic properties of AM-6494 and CNP-520 plus their binding energies when complexed with BACE1. For AM-6494 and CNP-520 interaction with protonated BACE1, the ONIOM calculation gave binding free energy of -62.849 and -33.463 kcal/mol, respectively. In the unprotonated model, we observed binding free energy of -59.758 kcal/mol in AM-6494. Taken together thermochemistry of the process and molecular interaction plot, AM-6494 is more favourable than CNP-520 towards the inhibition of BACE1. The protonated model gave slightly better binding energy than the unprotonated form. However, both models could sufficiently describe ligand binding to BACE1 at the atomistic level. Understanding the detailed molecular interaction of these inhibitors could serve as a basis for pharmacophore exploration towards improved inhibitor design.
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Affiliation(s)
- Samuel C Ugbaja
- Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4001, South Africa
| | - Zainab K Sanusi
- Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4001, South Africa
| | - Patrick Appiah-Kubi
- Molecular Bio-computational and Drug Design Research Group, School of Health Sciences, University of KwaZulu-Natal, Westville Campus, Durban 4001, South Africa
| | - Monsurat M Lawal
- Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4001, South Africa.
| | - Hezekiel M Kumalo
- Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban 4001, South Africa.
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11
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Akinpelu OI, Lawal MM, Kumalo HM, Mhlongo NN. Computational studies of the properties and activities of selected trisubstituted benzimidazoles as potential antitubercular drugs inhibiting MTB-FtsZ polymerization. J Biomol Struct Dyn 2020; 40:1558-1570. [PMID: 33021149 DOI: 10.1080/07391102.2020.1830176] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Trisubstituted benzimidazoles (trisbenz) are significantly active against nonreplicating Mycobacterium tuberculosis (MTB) by inhibiting the polymerization of Filamentous Temperature Sensitive Mutant Z (FtsZ), an essential bacteria cell division protein. In-depth in-silico study of 5 of the most active trisubstituted benzimidazoles; trisbenz 1, 2, 3, 4 and 5, giving insight into their properties, such as stability, bioavailability, interactions with residues at the binding site of MTB-FtsZ and their influence on structural dynamics of the protein have been conducted. This was achieved through the application of in-silico methods including density functional theory (DFT) calculations, ADME properties calculations, molecular docking and molecular dynamics simulations. A DFT approach was applied to predict reactivity properties of potent FtsZ inhibitors, and the results reveal the relative reactivity of these inhibitors as bioactive moieties. The estimated ADME properties predicted all 5 compounds to be bioavailable and suitable for oral administration. Molecular docking, binding free energy, RMSD, RMSF, and hydrogen bond analysis confirmed these 5 compounds as potent MTB-FtsZ inhibitors. Although analyses proved these compounds to be bioactive and potent MTB-FtsZ inhibitors, however, trisbenz 1 appeared to be the most active against this protein while trisbenz 5 was the least active. This study further confirms the experimental study while also giving insight on the compounds mechanism of action and presents their bioavailability properties.
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Affiliation(s)
- Olayinka I Akinpelu
- Biomolecular Modelling Research Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban, South Africa.,School of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Monsurat M Lawal
- Biomolecular Modelling Research Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban, South Africa
| | - Hezekiel M Kumalo
- Biomolecular Modelling Research Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban, South Africa
| | - Ndumiso N Mhlongo
- Biomolecular Modelling Research Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban, South Africa
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