scholarly journals Inhibitory Mechanism of Taxifolin against α-Glucosidase Based on Spectrofluorimetry and Molecular Docking

2017 ◽  
Vol 12 (11) ◽  
pp. 1934578X1701201 ◽  
Author(s):  
Jiang Liu ◽  
Xiansheng Wang ◽  
Sheng Geng ◽  
Benguo Liu ◽  
Guizhao Liang
Keyword(s):  
Hydrogen Bonding ◽  
Molecular Docking ◽  
Docking Simulation ◽  
Fluorescence Analysis ◽  
Binding Mode ◽  
Amino Acid Residues ◽  
Inhibitory Mechanism ◽  
Quenching Mechanism ◽  
Molecular Docking Simulation ◽  
And Behavior

The α-glucosidase inhibitory activity and behavior of taxifolin was first investigated by spectrofluorimetry and molecular docking. It was found that taxifolin inhibits α-glucosidase in a competitive manner with the IC50 value of 0.16 mg/mL. The intrinsic fluorescence quenching of α-glucosidase in the presence of taxifolin was observed by the static quenching mechanism. According to the thermodynamic study, the complex of taxifolin and α-glucosidase was maintained by van der Waals and hydrogen bonding. The binding mode provided by molecular docking simulation indicated the existence of hydrogen bonding between taxifolin and the amino acid residues of α-glucosidase (Glu429, Asp 568 and Glu771), which coincided with the result of fluorescence analysis.

scholarly journals Inhibitory Mechanism of Engeletin Against α-Glucosidase

2021 ◽  
Vol 16 (1) ◽  
pp. 1934578X2098672
Author(s):  
Yunbo Li ◽  
Xiaoling Liu ◽  
Haoyu Zhou ◽  
Bo Li ◽  
Igor Kostiantinovich Mazurenko
Keyword(s):  
Hydrogen Bonding ◽  
Molecular Docking ◽  
Amino Acid ◽  
Fluorescence Quenching ◽  
Fluorescence Spectroscopy ◽  
Inhibitory Concentration ◽  
Amino Acid Residues ◽  
Inhibitory Mechanism ◽  
Hydrophobic Force ◽  
First Time

The inhibitory mechanism of engeletin against α-glucosidase was investigated for the first time by fluorescence spectroscopy and molecular docking. The results showed that engeletin could inhibit α-glucosidase in a noncompetitive inhibition mode with a half-maximal inhibitory concentration value of 48.5 ± 6.0 µg/mL (0.11 ± 0.014 mmol/L). It was found that engeletin could cause static fluorescence quenching of α-glucosidase by forming a complex with α-glucosidase. The thermodynamic parameters indicated that the combination of engeletin and α-glucosidase was driven by hydrophobic force. The molecular docking results confirmed that some amino acid residues of α-glucosidase (Trp391, Arg428, Glu429, Gly566, Trp710, Glu771) could interact with engeletin by hydrogen bonding.

scholarly journals Exploring the Interaction of Tartrazine and Lipase: A Multispectroscopic Analysis, Docking and Computational Simulation Methods

2019 ◽  
Vol 7 (4) ◽  
pp. 1-7 ◽  
Author(s):  
Baosheng Liu ◽  
Hongcai Zhang ◽  
Xu Cheng
Keyword(s):  
Molecular Docking ◽  
Active Center ◽  
Environmental Changes ◽  
Computational Simulation ◽  
Docking Simulation ◽  
Amino Acid Residues ◽  
Molecular Docking Simulation ◽  
Lipase A ◽  
Endogenous Fluorescence ◽  
Hoff Equation

The interaction between food colorant tartrazine and lipase was studied by multi-spectroscopic and molecular docking simulation under simulated physiological conditions to evaluate the toxic of tartrazine at the protein level. The results showed that tartrazine could effectively quench the endogenous fluorescence of lipase. The thermodynamic parameters were obtained from the van't Hoff equation, and the Gibbs free energy ΔG<0, indicating that the reaction was spontaneous; ΔH<0, ΔS>0, indicating hydrophobic interaction played a major role in forming the tartrazine-lipase complex. as shown by the synchronous fluorescence, UV-vis absorption and circular dichroism data, tartrazine could lead to the conformational and micro environmental changes of lipase, which may affect its physiological function. Molecular docking results showed that tartrazine was site in the active center of lipase, which altered the microenvironment of amino acid residues at the catalytic active center of lipase.  

Design, Molecular docking, Synthesis and Biological evaluation of 5, 7 dimethyl pyrido(2, 3-d)pyrimidin-4-one and 4,5 dihydro pyrazolo (3, 4-d) pyrimidines for cytotoxic activity

2021 ◽  
pp. 3029-3038
Author(s):  
M. Sathish Kumar ◽  
M. Vijey Aanandhi
Keyword(s):  
Molecular Docking ◽  
Docking Simulation ◽  
Docking Studies ◽  
Biological Evaluation ◽  
Hep G2 ◽  
Molecular Docking Simulation ◽  
Hela Cell Lines ◽  
Benzene Diazonium ◽  
Synthesis And Biological Evaluation ◽  
Mcf 7

The fused pyrimidine derivatives are potent tyrosine kinase and thymidylate synthase inhibitors. The compound 3-(4-sulphonyl amino)-2-methyl thio-6-phenyl azo-5, 7-dimethyl pyrido(2,3-d)pyrimidin-4-one was synthesized from Ethyl 2-amino-4,6-dimethylpyridine-3-carboxylate, benzene diazonium chloride, benzene sulphonyl amino isothiocyanate in subsequent reactions. 1-(1, 3-benzothiazol-2-yl)-3-methyl-4-phenyl-1H-pyrazolo[3,4-d]pyrimidines were synthesized from 1, 3-benzothiazole, 2-thiol, Hydrazine Hydrate, 2-hydrazinyl-1, 3-benzothiazole and aldehydes in subsequent reactions. Twenty-five derivatives pyrimidine scaffolds were designed and performed molecular docking studies for the ability to inhibit the target protein using molecular docking simulation, selective compounds were synthesized and characterized by spectral methods. All the synthesized compounds evaluated for their antioxidant activity and MTT assay exhibited compounds 13c, 13e and 14d can be potential anticancer candidates against MCF-7, Hep G2 and Hela cell lines respectively. Based on all the studies conclude that good agreement was observed between the top-ranked docking scores and top experimental inhibitors when compared with standards ascorbic acid and imatinib. Hence, the compounds could be considered as new anticancer hits for further lead optimization.

Binding Investigation of Integrin αvβ3 With Its Inhibitors by SPR Technology and Molecular Docking Simulation

2010 ◽  
Vol 15 (2) ◽  
pp. 131-137 ◽  
Author(s):  
Yaqin Liu ◽  
Yuanjiang Pan ◽  
Yuhong Xu
Keyword(s):  
Molecular Docking ◽  
Binding Sites ◽  
Structural Model ◽  
Docking Simulation ◽  
Integrin Αvβ3 ◽  
Equilibrium Dissociation Constant ◽  
Molecular Docking Simulation ◽  
Spr Biosensor ◽  
Inhibitor Discovery ◽  
Equilibrium Dissociation

Integrins play critical roles in the process of angiogenesis and are attractive targets for anticancer therapies. It is desirable to develop new types of small-molecule inhibitors of integrin. Herein, the binding features of several inhibitors to integrin αvβ3 have been studied by surface plasmon resonance (SPR) biosensor technology and molecular docking analyses. The SPR results indicated that the equilibrium dissociation constant (KD) values are evaluated for the inhibitors and showed that the KD value of cyclopeptide c-Lys is much lower than the reference molecule. In addition, the 3D structural model of integrin αvβ3 was generated according to the crystal structure of the integrin αvβ3 complex, and the molecular docking simulation analyses revealed that the predicted binding sites for the most active cyclopeptide c-Lys were consistent with the reported structure. These results thus implied that cyclopeptide c-Lys could be developed as a novel inhibitor for integrin αvβ3. The current work has potential for application in structure-based integrin αvβ3 inhibitor discovery.

scholarly journals Discovery of GPX4 inhibitor by molecular docking simulation as a potential ferroptosis inducer

2020 ◽  
Vol 10 (1) ◽  
pp. 4929-4933
Keyword(s):  
Molecular Docking ◽  
Therapeutic Strategy ◽  
Docking Simulation ◽  
Drug Candidate ◽  
Synthetic Compounds ◽  
Molecular Docking Simulation ◽  
Docking Simulations ◽  
Lipinski’S Rule ◽  
Mercaptosuccinic Acid ◽  
Significant Public Health

As one of the most complex diseases in the world, cancer continues as one of the significant public health problems. It was recorded by 2014 that cancer caused 1,551,000 death in Indonesia. One type of programmed cell death (PCD) that played a role in cancer cell treatment is Ferroptosis. Ferroptosis is PCD on iron and characterized by the inactivation of glutathione-dependent peroxidase (GPx4). In this research, a new therapeutic strategy for cancer was developed through the computational approach on synthetic compounds to discover its potential as an inhibitor of GPx4. About 688 compounds derivative from mercaptosuccinic acid acquired from the Zinc15 database. These compounds screened through the Lipinski’s Rule of Three and pharmacological prediction to eliminate ligands with undesired molecular properties. After that, the ligands underwent both rigid and flexible molecular docking simulations to predict their inhibition activity toward GPx4. From molecular docking simulation, (2S)-2-[(Z)-3-phenylprop-2-enyl]sulfanylbutanedioic acid show favorable characteristics as a drug candidate.

PTP1B inhibitors from Selaginella tamariscina (Beauv.) Spring and their kinetic properties and molecular docking simulation

2017 ◽  
Vol 72 ◽  
pp. 273-281 ◽  
Author(s):  
Duc Dat Le ◽  
Duc Hung Nguyen ◽  
Bing Tian Zhao ◽  
Su Hui Seong ◽  
Jae Sue Choi ◽  
...  
Keyword(s):  
Molecular Docking ◽  
Docking Simulation ◽  
Kinetic Properties ◽  
Molecular Docking Simulation ◽  
Selaginella Tamariscina ◽  
Ptp1b Inhibitors
Sign in / Sign up

Export Citation Format

Share Document