Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

A structural and dynamic model for the nicotinic acetylcholine receptor.

E M Kosower1

  • 1Biophysical Organic Chemistry Unit, School of Chemistry, Sackler Faculty of Exact Sciences, Tel-Aviv University, Ramat-Aviv, Israel.

Progress in Clinical and Biological Research
|January 1, 1989
PubMed
Summary

A new structural model for the nicotinic acetylcholine receptor (AChR) explains its function, including ion channel gating and drug interactions. This model clarifies receptor activation, desensitization, and antagonist binding mechanisms.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A molecular model for an acetylcholine binding site: ion channel and the bilayer helices of the acetylcholine receptor assigned using single group rotation theory and electrostatic interactions.

Biophysical journal·2009
Same author

Diamide: an oxidant probe for thiols.

Methods in enzymology·1995
Same author

Bromobimane probes for thiols.

Methods in enzymology·1995
Same author

para-sulfobenzoyloxybromobimane: a new membrane-impermeable reagent useful for the analysis of thiols and their export from cells.

Analytical biochemistry·1992
Same author

Deuterium exchange on micrograms of proteins by attenuated total reflection Fourier transform infrared spectroscopy on silver halide fiber.

Analytical biochemistry·1992
Same author

Sensory mechanisms on the molecular level.

Endeavour·1992

Area of Science:

  • Biochemistry
  • Structural Biology
  • Neuroscience

Background:

  • The nicotinic acetylcholine receptor (AChR) is a crucial ion channel protein involved in neurotransmission.
  • Understanding its complex structure and dynamic behavior is essential for pharmacology and neuroscience.

Purpose of the Study:

  • To develop a functional structural model of the nicotinic acetylcholine receptor (AChR) based on its five polypeptide subunits.
  • To elucidate the molecular mechanisms underlying AChR activation, ion channel function, and drug interactions.

Main Methods:

  • Integration of hydrophobicity, amphipathic character, molecular shape, binding site information, disulfide bonds, genetic homology, and antagonist labeling.
  • Decomposition of the AChR model into exobilayer, bilayer, and cytoplasmic components.

Related Experiment Videos

  • Analysis of subunit interactions and conformational changes during activation and desensitization.

    • Main Results:

    • A detailed model of the AChR structure, comprising beta-strands (exobilayer), alpha-helices (bilayer), and cytoplasmic loops.
    • A "flower" model for the exobilayer, explaining agonist-induced opening (activation) and partial closing (desensitization).
    • A molecular mechanism for ion flow through the amphipathic helices of the ion channel and an explanation for non-competitive antagonist labeling.

    Conclusions:

    • The proposed AChR model provides a unified framework for interpreting diverse experimental data on receptor dynamics and function.
    • The model clarifies the roles of different subunits and structural elements in receptor gating and ligand binding.
    • This structural insight facilitates a deeper understanding of cholinergic signaling and the development of targeted therapeutics.