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G-protein Coupled Receptors01:21

G-protein Coupled Receptors

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G-protein Coupled Receptors01:21

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G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
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The affinity, intrinsic activity and selectivity of a structurally novel EP<sub>2</sub> receptor agonist at human prostanoid receptors.

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Related Experiment Video

Updated: May 28, 2026

Parallel Interrogation of &#946;-Arrestin2 Recruitment for Ligand Screening on a GPCR-Wide Scale using PRESTO-Tango Assay
09:03

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Published on: March 10, 2020

Prostanoid receptor assays.

J Chen1, D F Woodward, R A Coleman

  • 1Allergan, Irvine, California, USA.

Current Protocols in Pharmacology
|October 1, 2011
PubMed
Summary
This summary is machine-generated.

This study reviews prostanoid receptors, including prostaglandins (PGs) and thromboxanes (TXs), and their subtypes like EP receptors. It highlights available assays for studying these receptors in smooth muscle and platelets.

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Area of Science:

  • Biochemistry
  • Pharmacology

Background:

  • Prostanoids, encompassing prostaglandins (PGs) and thromboxanes (TXs), are key signaling molecules.
  • These molecules exert their effects by binding to specific G-protein coupled receptors (GPCRs).
  • Five distinct prostanoid receptor types (DP, EP, FP, IP, TP) are known, each sensitive to a specific natural prostanoid.

Purpose of the Study:

  • To detail the characteristics of prostanoid receptors and their subtypes.
  • To focus on the EP receptor family, which has four well-characterized subtypes (EP₁, EP₂, EP₃, EP₄).
  • To present available assays for studying prostanoid receptors in smooth muscle and platelet preparations.

Main Methods:

  • Review of existing literature on prostanoid receptor families and subtypes.
  • Description of receptor expression patterns in mammalian tissues.
  • Compilation of functional assays for prostanoid receptor research.

Main Results:

  • Prostanoid receptors (DP, EP, FP, IP, TP) are widely distributed in mammals.
  • EP receptor subtypes (EP₁, EP₂, EP₃, EP₄) are highly expressed in smooth muscle and platelets.
  • Various assays are available for studying these receptors, despite challenges with isolated preparations.

Conclusions:

  • Prostanoid receptors and their subtypes play significant roles in physiological processes.
  • The EP receptor family, particularly its subtypes, is a key area of research.
  • Established assays facilitate the investigation of prostanoid receptor function in relevant biological systems.