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Related Concept Videos

Oral Hypoglycemic Agents: α-Glucosidase Inhibitors01:19

Oral Hypoglycemic Agents: α-Glucosidase Inhibitors

α-glucosidase inhibitors, including acarbose (Precose), miglitol (Glyset), and voglibose (Voglib) (primarily available in Asia), are drugs that control blood sugar levels by delaying the digestion of starch and disaccharides. They achieve this by inhibiting α-glucosidase enzymes in the intestine, which slow the absorption of carbohydrates in the intestine, which in turn leads to a prolonged release of the glucoregulatory hormone GLP-1 from intestinal L-cells.
Acarbose and miglitol are typically...
Glucagon-like Receptor Agonists01:24

Glucagon-like Receptor Agonists

Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by the...
Dipeptidyl Peptidase 4 Inhibitors01:23

Dipeptidyl Peptidase 4 Inhibitors

Dipeptidyl peptidase 4 (DPP-4) is a serine protease widely distributed in the body. It's involved in the inactivation of GLP-1 and GIP hormones, which are crucial for insulin regulation. DPP-4 inhibitors, such as sitagliptin (Januvia), saxagliptin (Onglyza), linagliptin (Tradjenta), alogliptin (Nesina), and vildagliptin (Galvus), help increase the proportion of active GLP-1, enhancing insulin secretion. These inhibitors work by competitively binding to DPP-4. This binding causes a significant...
Cell Specific Gene Expression01:58

Cell Specific Gene Expression

Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
Enzyme Inhibition01:30

Enzyme Inhibition

Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of inhibitors. Drugs and other toxins can also inhibit enzymes. Some inhibitors bind to the enzyme’s active site, while others inhibit enzymatic activity by binding to other sites on the protein structure.
Hormones Regulating Blood Glucose01:16

Hormones Regulating Blood Glucose

Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
In addition to accelerating glucose uptake and utilization, insulin has...

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Structural Biology and Analytical Chemistry Approaches for Characterizing C-Glycoside Metabolic Enzymes in Human Gut Microbiota
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[The interaction between genistein and beta-glucosidase].

Yao-Dong Zhang1, Qun-Qun Gao, Cai-Hong Yu

  • 1Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, China. ydzhang@snnu.edu.cn

Yao Xue Xue Bao = Acta Pharmaceutica Sinica
|September 3, 2011
PubMed
Summary

Genistein inhibits beta-glucosidase activity by binding strongly through hydrogen bonds and hydrophobic interactions. This study elucidates the molecular mechanism of genistein

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Published on: August 13, 2011

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Enzymology

Context:

  • Beta-glucosidase is a key enzyme in various biological processes.
  • Genistein, a soy isoflavone, has known biological activities.
  • Understanding enzyme-inhibitor interactions is crucial for drug discovery and biochemical research.

Purpose:

  • To investigate the interaction between genistein and beta-glucosidase.
  • To determine the binding mechanism and affinity using spectroscopic and computational methods.
  • To assess the inhibitory effect of genistein on beta-glucosidase activity.

Summary:

  • Fluorescence quenching and synchronous fluorimetry revealed a static quenching mechanism for genistein-beta-glucosidase interaction.
  • Binding constants indicate strong affinity, with values decreasing as temperature increases.
  • Molecular docking simulations suggest genistein binds to beta-glucosidase via hydrogen bonds, hydrophobic interactions, and electrostatic forces.

Impact:

  • Provides insights into the molecular basis of genistein's inhibitory action on beta-glucosidase.
  • Highlights the potential of genistein as an inhibitor for beta-glucosidase-related applications.
  • Contributes to the understanding of isoflavone-enzyme interactions in biological systems.