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Related Experiment Videos

Mutual induced fit in cyclodextrin-rocuronium complexes.

Alan Cooper1, Margaret Nutley, Elizabeth J MacLean

  • 1Department of Chemistry, Glasgow University, Scotland, UK.

Organic & Biomolecular Chemistry
|May 13, 2005
PubMed
Summary
This summary is machine-generated.

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Rocuronium bromide and modified cyclodextrin undergo conformational changes to form complexes. This dynamic host-guest interaction shows a mutual induced fit, revealing a classic example of molecular recognition.

Area of Science:

  • Supramolecular Chemistry
  • Host-Guest Chemistry
  • Molecular Recognition

Background:

  • Cyclodextrins are widely used as hosts in supramolecular chemistry.
  • Rocuronium bromide is a neuromuscular blocking agent.
  • Understanding guest-host complexation is crucial for drug delivery and molecular assembly.

Purpose of the Study:

  • To investigate the binding mechanism of rocuronium bromide with a modified gamma-cyclodextrin.
  • To elucidate the thermodynamic and structural basis of the complexation process.
  • To explore the role of conformational changes in host-guest interactions.

Main Methods:

  • Isothermal titration calorimetry (ITC) for thermodynamic analysis.
  • Nuclear Magnetic Resonance (NMR) and fluorescence spectroscopy for solution studies.

Related Experiment Videos

  • X-ray crystallography and molecular modelling for structural insights.

    • Main Results:

    • Biphasic binding behavior indicating binary and ternary complex formation.
    • Evidence of sequential complexation involving conformational switching.
    • Rocuronium bromide switches from chair to twist-boat conformation.
    • Modified cyclodextrin opens its cavity for guest encapsulation.

    Conclusions:

    • The complexation involves a dynamic process of mutual induced fit.
    • Conformational changes in both host and guest are essential for encapsulation.
    • This study exemplifies dynamic host-guest chemistry and molecular recognition.