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Related Experiment Videos

Time-dependent ligand current into a single cell performing chemoreception.

B J Geurts1, F W Wiegel

  • 1Center for Theoretical Physics, University of Twente, Enschede, The Netherlands.

Biophysical Chemistry
|October 1, 1987
PubMed
Summary
This summary is machine-generated.

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This study models ligand-receptor interactions on a single cell. It reveals that reaching a steady state for ligand binding depends on ligand concentration proximity and diffusion time.

Area of Science:

  • Biophysics
  • Chemical Kinetics
  • Cell Biology

Background:

  • Cells possess numerous receptors on their surface for ligand binding.
  • Understanding ligand-receptor dynamics is crucial for cellular processes.

Purpose of the Study:

  • To determine the ligand current into a single spherical cell with surface receptors.
  • To analyze the impact of ligand concentration and diffusion on steady-state binding.

Main Methods:

  • Mathematical modeling of ligand distribution around a spherical cell.
  • Calculation of time-dependent ligand current based on concentration gradients.
  • Analysis of diffusion-limited binding kinetics.

Main Results:

  • Steady-state ligand current is achieved faster when ligand concentration is maintained near the cell.

Related Experiment Videos

  • If ligand concentration is constant at infinity, reaching steady state takes significantly longer (approx. 1000 times diffusion time).

    • Conclusions:

    • The rate of ligand binding and achieving a steady state is highly sensitive to the external ligand concentration profile.
    • Diffusion time and cell proximity are key factors governing ligand-receptor interactions.