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Structural insights into endothelin receptor signalling.

Wataru Shihoya1, Fumiya K Sano1, Osamu Nureki1

  • 1Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo 113-0033, Japan.

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Endothelin receptors (ETA and ETB) regulate cell functions via G proteins. Structural studies reveal their activation mechanisms and drug binding, aiding in developing new therapeutics.

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Area of Science:

  • Molecular biology
  • Structural biology
  • Pharmacology

Background:

  • Endothelins and their receptors (ETA, ETB) are key regulators of cellular processes like growth, survival, invasion, and angiogenesis.
  • These receptors signal through multiple G proteins, influencing various physiological functions.

Approach:

  • This review summarizes structural data obtained via X-ray crystallography and cryo-electron microscopy for endothelin receptors.
  • It details the mechanisms of receptor activation by endothelins and the conformational changes involved.
  • The binding modes of clinical antagonists and inverse agonists are also explored.

Key Points:

  • Structural insights into endothelin receptors reveal unique G-protein coupling mechanisms.
  • Understanding receptor activation and drug interactions is crucial for therapeutic development.
  • The review highlights findings relevant to vasodilatory antagonists and agonists.

Conclusions:

  • Structural and mechanistic studies of endothelin receptors provide a foundation for targeted drug discovery.
  • Insights into G-protein activation by endothelin receptors have significant therapeutic implications.
  • Further research can lead to novel treatments for conditions involving the endothelin system.