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Related Concept Videos

Structure-Activity Relationships and Drug Design01:28

Structure-Activity Relationships and Drug Design

Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence its...
Drugs Affecting Neurotransmitter Synthesis01:29

Drugs Affecting Neurotransmitter Synthesis

Drugs affecting neurotransmitter synthesis can impact the adrenergic neuron and the synthesis of neurotransmitters. For example, α-methyltyrosine and carbidopa target specific enzymes involved in catecholamine synthesis. α-methyltyrosine inhibits the enzyme tyrosine hydroxylase, which converts tyrosine into dopamine. By blocking this enzyme, α-methyltyrosine reduces dopamine production and other catecholamines. Carbidopa, on the other hand, inhibits the enzyme dopa decarboxylase, which converts...
G Protein-coupled Receptors01:15

G Protein-coupled Receptors

G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
Drug Discovery: Overview01:26

Drug Discovery: Overview

Drug discovery is a multifaceted process involving extensive screening, testing, and optimization of lead compounds to identify potential new drugs for therapeutic use. It combines several approaches, including screening large numbers of natural products, chemical modification of known active molecules, identification of new drug targets, and rational design based on biological mechanisms and drug-receptor structure. These approaches are carried out in both academic research laboratories and...
Adrenergic Agonists: Chemistry and Structure-Activity Relationship01:16

Adrenergic Agonists: Chemistry and Structure-Activity Relationship

Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
The Two-State Receptor Model01:29

The Two-State Receptor Model

The two-state receptor model explains a drug's interaction with receptors, such as G protein-coupled receptors and ligand-gated ion channels, to induce or inhibit a biological response. When no natural ligands are present, a receptor exists in an equilibrium of inactive (Ri) and active (Ra) conformations. The inactive form does not produce a response, while the active form generates a basal effect known as constitutive activity.
The binding affinity of a drug determines its interaction with one...

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Structure-based drug design for dopamine D3 receptor.

Zhiwei Feng1, Tingjun Hou, Youyong Li

  • 1Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu, Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China.

Combinatorial Chemistry & High Throughput Screening
|August 31, 2012
PubMed
Summary

This study reviews dopamine D3 receptor (D3R) drug targets, summarizing active compounds and structure-activity relationships. It details D3R structure and inhibitor interactions, aiding the development of selective D3R antagonists and agonists.

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Area of Science:

  • Neuroscience
  • Pharmacology
  • Structural Biology

Background:

  • D2-like receptors, including dopamine D3 receptor (D3R), are crucial for behavior, cognition, and emotion.
  • D3R is a key therapeutic target for antipsychotic and anti-parkinsonian drugs.

Purpose of the Study:

  • To summarize active compounds and structure-activity relationships (SAR) for D3R.
  • To analyze the D3R crystal structure and its differences from other GPCRs.
  • To elucidate D3R inhibitor recognition mechanisms and outline future drug development.

Main Methods:

  • Review of available active compounds and SAR studies for D3R.
  • Analysis of the recent D3R crystal structure.
  • Molecular docking and molecular dynamics simulations to study inhibitor-GPCR interactions.

Main Results:

  • Identification of lead templates for D3R drug modification.
  • Detailed description of D3R structure and its unique features.
  • Elucidation of inhibitor binding mechanisms through molecular simulations.

Conclusions:

  • The study provides valuable insights into D3R structure and inhibitor interactions.
  • Findings support the development of highly selective and potent D3R antagonists and agonists.
  • This information is critical for advancing D3R-targeted drug discovery.