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Adebayo MA, Kolawole AN, Falese BA, Kolawole AO. Spectroscopic and in silico evaluation of hesperetin, aglycone flavanone, as a prospective regulatory ligand for human salivary α-amylase. J Biomol Struct Dyn 2024; 42:3177-3192. [PMID: 37382217 DOI: 10.1080/07391102.2023.2225621] [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: 08/29/2022] [Accepted: 05/01/2023] [Indexed: 06/30/2023]
Abstract
The insight into the binding mechanism of hesperetin, an aglycone flavanone, with human salivary α-amylase (HSAA), simulated under physiological salivary condition, was explored using various spectroscopic approaches and in silico method. Hesperetin effectively quenched the intrinsic fluorescence of HSAA and the quenching was mixed quenching mechanism. The interaction perturbed the HSAA intrinsic fluorophore microenvironment and the enzyme global surface hydrophobicity. The negative values of ΔG for thermodynamic parameters and in silico study revealed the spontaneity of HSAA-hesperetin complex while the positive values of enthalpy change (ΔH) and entropy change (ΔS) showed noticeable involvement of hydrophobic bonding in the stabilization of the complex. Hesperetin was a mixed inhibitor for HSAA with a KI of 44.60 ± 1.63 μM and having apparent inhibition coefficient (α) of 0.26. Macromolecular crowding, given rise to microviscosity and anomalous diffusion, regulated the interaction. Sodium ion (Na+) created high ionic strength, also, modulated the interaction. The in silico study proposed the preferential binding of hesperetin at the active cleft domain of HSAA with the least energy of -8.0 kcal/mol. This work gives a novel insight on the potentials of hesperetin as a future prospective medicinal candidate in the management of postprandial hyperglycemic condition.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Masaudat A Adebayo
- Department of Science Laboratory Technology (Biochemistry Option), School of Science and Technology, Federal Polytechnic, Ede, Osun State, Nigeria
| | - Adejoke N Kolawole
- Biomolecular Structure and Dynamics Unit, Department of Biochemistry, The Federal University of Technology, Akure, Nigeria
| | - Babatunde A Falese
- Biomolecular Structure and Dynamics Unit, Department of Biochemistry, The Federal University of Technology, Akure, Nigeria
| | - Ayodele O Kolawole
- Biomolecular Structure and Dynamics Unit, Department of Biochemistry, The Federal University of Technology, Akure, Nigeria
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Richa, Kushwaha N, Negi S, Kumar A, Zangrando E, Kataria R, Saini V. Synthesis, characterization and utility of a series of novel copper(II) complexes as excellent surface disinfectants against nosocomial infections. Dalton Trans 2021; 50:13699-13711. [PMID: 34013925 DOI: 10.1039/d1dt00199j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nosocomial infections are among the major public health concerns, especially during the ongoing Covid19 pandemic. There is a great demand for novel chemical agents that are capable of killing specific pathogens or augmenting the efficiency of existing disinfectants. Herein, we report the synthesis and comprehensive characterization (through FT-IR, HR-MS, SEM, TGA-DSC, CV, UV and SCXRD analyses) of six novel copper(II) complexes, [CuL(4X-An)] (5a-5d), [CuL(An)] (5e), and [CuL(benzhydrylamine)] (5f), and their evaluation as anti-microbial agents against WHO priority pathogens, confirming their possible use in hospital settings. The compounds were synthesized with a Schiff base (H2L) obtained by the condensation reaction of 3-acetyl-6-methyl-2H-pyran-2,4(3H)-dione (DHA) and benzohydrazide and further addition of different p-substituted aniline (An) molecules. Single crystal structure analyses revealed that the aniline derivatives are isostructural to the copper atom in a square planar coordination, while the benzhydrylamine complex forms a dimer (5f), with a square pyramidal coordination geometry for the metal. Time-kill kinetics and reduced microbial recovery studies revealed excellent bactericidal action against Staphylococcus aureus and Enterococcus faecalis. Particularly, the novel compound 5f significantly reduced microbial recovery compared to ethanol-based sanitisers. In fact, addition of 5f to 70% ethanol remarkably synergized the killing with >6-log reduction in microbial burden. Overall, our novel compounds would increase the disinfection efficacy in hospitals and industries, thereby improving the efficiency and minimizing the risk of infections.
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Affiliation(s)
- Richa
- Department of Chemistry & Centre of Advance Studies in Chemistry, Panjab University, Chandigarh, 160014, India.
| | - Namrata Kushwaha
- Laboratory of Infection Biology and Translational Research, Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India.
| | - Sheetal Negi
- Laboratory of Infection Biology and Translational Research, Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India.
| | - Ajay Kumar
- Department of Chemistry & Centre of Advance Studies in Chemistry, Panjab University, Chandigarh, 160014, India.
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste 34127, Italy
| | - Ramesh Kataria
- Department of Chemistry & Centre of Advance Studies in Chemistry, Panjab University, Chandigarh, 160014, India.
| | - Vikram Saini
- Laboratory of Infection Biology and Translational Research, Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India.
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Falese BA, Kolawole AN, Sarumi OA, Kolawole AO. Probing the interaction of iminium form of sanguinarine with human salivary α-amylase by multi-spectroscopic techniques and molecular docking. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116346] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Arif R, Rana M, Yasmeen S, Amaduddin, Khan MS, Abid M, Khan M, Rahisuddin. Facile synthesis of chalcone derivatives as antibacterial agents: Synthesis, DNA binding, molecular docking, DFT and antioxidant studies. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.127905] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Kabeer H, Hanif S, Arsalan A, Asmat S, Younus H, Shakir M. Structural-Dependent N,O-Donor Imine-Appended Cu(II)/Zn(II) Complexes: Synthesis, Spectral, and in Vitro Pharmacological Assessment. ACS OMEGA 2020; 5:1229-1245. [PMID: 31984281 PMCID: PMC6977212 DOI: 10.1021/acsomega.9b03762] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 12/23/2019] [Indexed: 05/26/2023]
Abstract
Four mononuclear bioefficient imine-based coordination complexes, [(L 1 ) 2 Cu], [(L 1 ) 2 Zn], [(L 2 )Cu(H 2 O)], and [(L 2 )Zn(H 2 O)], were synthesized using ligands [L 1 = 2-(((3-hydroxynaphthalen-2-yl)methylene)amino)-2-methylpropane-1,3-diol and L 2 = 4-(1-((1,3-dihydroxy-2-methylpropan-2-yl)imino)ethyl)benzene-1,3-diol]. The formation of the complexes was ascertained by elemental analysis, Fourier transform infrared, 1H NMR, 13C NMR, electrospray ionization-mass spectroscopy, electron paramagnetic resonance, and thermogravimetric analysis. The comparative binding propensity profiles of the above-synthesized complexes with the DNA/human serum albumin (HSA) were investigated via UV absorption, fluorescence, and Förster resonance energy-transfer studies. On the basis of extended conjugation and planarity, L 1 complexes exhibited superior bioactivity with greater calculated DNA binding constant values, (K b) 2.9444 × 103 [(L 1 ) 2 Cu] and 2.2693 × 103 [(L 1 ) 2 Zn], as compared to L 2 complexes, 1.793 × 103 [(L 2 )Cu(H 2 O)] and 9.801 × 102 [(L 2 )Zn(H 2 O)]. The competitive displacement assay of complexes was performed by means of fluorogenic dyes (EtBr and Hoechst), which corroborates the occurrence of minor groove binding because of the enhanced displacement activity with Hoechst 33258. The minor groove binding of the [(L 1 ) 2 Cu] complex is further confirmed by the molecular docking study. Moreover, the HSA study demonstrated effective static quenching of complexes with substantial K sv values. The [(L 1 ) 2 Cu] complex was found to have pronounced cleavage efficiency as evaluated from sodium dodecyl sulfate polyacrylamide gel electrophoresis electrophoresis. Furthermore, in vitro antioxidant activity against 2,2-diphenyl-1-picrylhydrazyl and superoxide radicals further proclaimed the remarkable bioefficiency of compounds, which make them promising as active chemotherapeutic agents.
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Affiliation(s)
- Hina Kabeer
- Department
of Chemistry, Interdisciplinary Biotechnology Unit, and Department of
Biochemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Summaiya Hanif
- Department
of Chemistry, Interdisciplinary Biotechnology Unit, and Department of
Biochemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Abdullah Arsalan
- Department
of Chemistry, Interdisciplinary Biotechnology Unit, and Department of
Biochemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Shamoon Asmat
- Department
of Chemistry, Interdisciplinary Biotechnology Unit, and Department of
Biochemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Hina Younus
- Department
of Chemistry, Interdisciplinary Biotechnology Unit, and Department of
Biochemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Mohammad Shakir
- Department
of Chemistry, Interdisciplinary Biotechnology Unit, and Department of
Biochemistry, Aligarh Muslim University, Aligarh 202002, India
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Synthesis, DNA Binding, and Molecular Docking Studies of Dimethylaminobenzaldehyde-Based Bioactive Schiff Bases. J CHEM-NY 2019. [DOI: 10.1155/2019/8152721] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
A new series of p-dimethylaminobenzaldehyde derivatives were tested for therapeutic potential by exploring their properties through characterization. The derivatives were synthesized by 1 : 1 condensation reaction of p-dimethylaminobenzaldehyde and substituted amines. The synthesized compounds 1–8 were characterized by different characterization techniques including IR, mass, 1H NMR, and 13C NMR spectroscopy, elemental analysis, and mass spectrometry. Furthermore, binding of these Schiff bases to Ct-DNA was examined by absorption spectroscopy, fluorescence quenching, circular dichroic, viscosity measurement, molecular docking, and molecular dynamics simulation methods. Schiff bases were tested for antimicrobial activity against bacterial species Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Staphylococcus aureus by the disc diffusion method. The pharmacological treatment of Schiff bases showed that 1–8 have promising potential against tested bacterial strains. The molecular docking study of the target compounds was also carried out against B-DNA dodecamer d(CGCGAATTCGCG)2, and it has been found that 1–8 can bind to Ct-DNA via an intercalative mode. DPPH free radical and hydrogen peroxide scavenging assays were employed to assess the antioxidant potential of synthesized Schiff bases.
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Alam MF, Varshney S, Khan MA, Laskar AA, Younus H. In vitro DNA binding studies of therapeutic and prophylactic drug citral. Int J Biol Macromol 2018; 113:300-308. [DOI: 10.1016/j.ijbiomac.2018.02.098] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/10/2018] [Accepted: 02/14/2018] [Indexed: 01/09/2023]
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