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Related Concept Videos

Local Anesthetics: Chemistry and Structure-Activity Relationship01:30

Local Anesthetics: Chemistry and Structure-Activity Relationship

Local anesthetics (LAs) are drugs that induce a temporary loss of sensation in a limited body area, preventing pain. Cocaine was the first local anesthetic discovered in the late 19th century. Cocaine is a benzoic acid ester obtained from the leaves of coca shrubs and was often used for its psychotropic effects. Cocaine was first isolated in 1860 by Albert Niemann. Sigmund Freud studied the physiological actions of cocaine. Carl Koller later introduced it into clinical practice in 1884 as a...
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Related Experiment Video

Updated: Jul 7, 2026

Structure-Guided Design and Development of Novel Cyclophilin A Inhibitors and Ganoderiol-F Derivatives: An In-Silico Approach
10:01

Structure-Guided Design and Development of Novel Cyclophilin A Inhibitors and Ganoderiol-F Derivatives: An In-Silico Approach

Published on: June 23, 2026

Four-alpha-helix bundle with designed anesthetic binding pockets. Part I: structural and dynamical analyses.

Dejian Ma1, Nicole R Brandon, Tanxing Cui

  • 1Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, 15260, USA.

Biophysical Journal
|March 4, 2008
PubMed
Summary

This study reveals the high-resolution structure of a designed four-alpha-helix bundle, a mimic for general anesthetic binding sites. The structure elucidates specific anesthetic-protein interactions crucial for understanding anesthesia mechanisms.

Related Experiment Videos

Last Updated: Jul 7, 2026

Structure-Guided Design and Development of Novel Cyclophilin A Inhibitors and Ganoderiol-F Derivatives: An In-Silico Approach
10:01

Structure-Guided Design and Development of Novel Cyclophilin A Inhibitors and Ganoderiol-F Derivatives: An In-Silico Approach

Published on: June 23, 2026

Area of Science:

  • Biochemistry
  • Structural Biology
  • Pharmacology

Background:

  • Cys-loop receptors are implicated as protein targets for general anesthetics.
  • Understanding anesthetic-protein interactions is key to elucidating general anesthesia mechanisms.

Purpose of the Study:

  • To determine the high-resolution structure of a designed four-alpha-helix bundle mimicking anesthetic binding sites.
  • To identify specific binding pockets and interactions for volatile anesthetics within the bundle.

Main Methods:

  • High-resolution Nuclear Magnetic Resonance (NMR) spectroscopy to solve protein structure.
  • NMR relaxation dispersion measurements and Modelfree analysis for protein dynamics.
  • Autodock analysis for predicting anesthetic binding sites.

Main Results:

  • The determined structure (PDB ID: 2I7U) revealed an asymmetric quaternary arrangement of the four helices.
  • A primary anesthetic binding pocket was identified within the dimeric hydrophobic core, centered between W15 side chains.
  • Protein dynamics analysis indicated potential exchange contributions to relaxation at multiple residues.

Conclusions:

  • The high-resolution structure provides atomistic details of potential anesthetic-protein interaction sites.
  • This provides a foundation for understanding the molecular mechanisms of general anesthesia.
  • The designed protein serves as a valuable model for studying anesthetic binding.