Iodine -A Versatile reagent for Vinylogous Mannich Reaction for the Synthesis of δ-Amino γ-Butenolides and Insilico Evaluation

2021 ◽  
pp. 3921-3926
Author(s):  
Nagamani C. ◽  
Sherisha D. ◽  
Sumalatha K. ◽  
Sowjanya M.
Keyword(s):  
Mannich Reaction ◽  
Structural Changes ◽  
Molecular Iodine ◽  
Spectroscopic Techniques ◽  
Receptor Interactions ◽  
Novel Method ◽  
Molecular Modeling Studies ◽  
Drug Receptor ◽  
Layer Chromatography ◽  
Versatile Reagent

A set of δ-amino γ-butenolides (1-5) were synthesised by a novel method using molecular iodine as a catalyst by mannich reaction. The purity and progress of the reaction was assessed by thin layer chromatography and the compounds characterisation was done by IR, proton NMR and mass spectroscopic techniques. Molecular modeling studies for the compounds such as docking was performed for the synthesized butenolides to understand the drug receptor interactions and analyze structural changes when bound to the active site of the receptor. the results showed that the compounds 2 and 3 showed significant interaction with target enzymes.

Influence of Ascorbic Acid on the Structure and Function of Alpha-2- macroglobulin: Investigations using Spectroscopic and Thermodynamic Techniques

2020 ◽  
Vol 27 (3) ◽  
pp. 201-209
Author(s):  
Syed Saqib Ali ◽  
Mohammad Khalid Zia ◽  
Tooba Siddiqui ◽  
Haseeb Ahsan ◽  
Fahim Halim Khan
Keyword(s):  
Ascorbic Acid ◽  
Conformational Changes ◽  
Structural Changes ◽  
The Body ◽  
Titration Calorimetry ◽  
Spectroscopic Techniques ◽  
Human Beings ◽  
Plasma Ascorbic Acid ◽  
Dietary Antioxidant ◽  
And Function

Background: Ascorbic acid is a classic dietary antioxidant which plays an important role in the body of human beings. It is commonly found in various foods as well as taken as dietary supplement. Objective: The plasma ascorbic acid concentration may range from low, as in chronic or acute oxidative stress to high if delivered intravenously during cancer treatment. Sheep alpha-2- macroglobulin (α2M), a human α2M homologue is a large tetrameric glycoprotein of 630 kDa with antiproteinase activity, found in sheep’s blood. Methods: In the present study, the interaction of ascorbic acid with alpha-2-macroglobulin was explored in the presence of visible light by utilizing various spectroscopic techniques and isothermal titration calorimetry (ITC). Results: UV-vis and fluorescence spectroscopy suggests the formation of a complex between ascorbic acid and α2M apparent by increased absorbance and decreased fluorescence. Secondary structural changes in the α2M were investigated by CD and FT-IR spectroscopy. Our findings suggest the induction of subtle conformational changes in α2M induced by ascorbic acid. Thermodynamics signatures of ascorbic acid and α2M interaction indicate that the binding is an enthalpy-driven process. Conclusion: It is possible that ascorbic acid binds and compromises antiproteinase activity of α2M by inducing changes in the secondary structure of the protein.

Research on drug-receptor interactions and prediction of drug activity via oriented immobilized receptor capillary electrophoresis

2015 ◽  
Vol 36 (19) ◽  
pp. 2433-2441 ◽  
Author(s):  
Chunye Liu ◽  
Xuejiao Zhang ◽  
Hui Jing ◽  
Yanqing Miao ◽  
Lingzhi Zhao ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Drug Activity ◽  
Receptor Interactions ◽  
Immobilized Receptor ◽  
Drug Receptor

Development of proteo-chemometrics: a novel technology for the analysis of drug-receptor interactions

2001 ◽  
Vol 1525 (1-2) ◽  
pp. 180-190 ◽  
Author(s):  
Maris Lapinsh ◽  
Peteris Prusis ◽  
Alexandrs Gutcaits ◽  
Torbjörn Lundstedt ◽  
Jarl E.S. Wikberg
Keyword(s):  
Novel Technology ◽  
Receptor Interactions ◽  
Drug Receptor

scholarly journals Investigation of the Effect of Sodium Selenate on Acetylcholinesterase Activity under Extremely Low Frequency Electromagnetic Field

2012 ◽  
Vol 4 (1) ◽  
Author(s):  
Ezzatollah Fathi ◽  
Raheleh Farahzadi
Keyword(s):  
Electromagnetic Field ◽  
Structural Changes ◽  
Tertiary Structure ◽  
Low Frequency ◽  
Acetylcholinesterase Activity ◽  
The Elderly ◽  
Skin Aging ◽  
Sodium Selenate ◽  
Spectroscopic Techniques ◽  
Extremely Low Frequency

Acetylcholinestrase (AChE EC 3.1.1.7) is one of the most important enzymes in nervous system, which plays a role in Alzheimer’s disease. Selenium is a vital micronutrient and many investigations have been performed about the physiological, biochemical and behavioral effects of this element, such as postponing the Alzheimer's symptoms in the elderly and delaying the initiation signs of skin aging. Recent studies have shown that this element protects various enzymes against the toxicity caused by heavy metals such as; Pb, Al, Cu and Cd. AChE activity is altered under the influence of extremely low frequency electromagnetic field (ELF-EMF). In this study, the effects of ELF-EMF, with 0.3 mT field intensity and 50, 100, 217 Hz frequencies, were investigated on the AChE, in the presence of different concentrations of sodium selenate, using UV-Visible, fluorescence and circular dichroism spectroscopic techniques. The results demonstrated that the enzyme activity declined by increasing the frequency and the amount of sodium selenate. Also, significant structural changes occurred in the secondary and tertiary structures of AChE. Our results showed that with increasing the concentration of sodium selenate transition from α-helix to β-structure was appeared in the presence of ELF-EMF. In conclusion, according to changes observed in the secondary and tertiary structure of enzyme, it is proposed that these fields are able to affect the structure and dynamics of the active site gorge of AChE.

Indirect Modelling of Drug-Receptor Interactions

1991 ◽  
pp. 135-147 ◽  
Author(s):  
Uli Hacksell ◽  
Anette M. Johansson ◽  
Anders Karlén ◽  
Charlotta Mellin
Keyword(s):  
Receptor Interactions ◽  
Drug Receptor
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