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Related Concept Videos

Ligand Binding Sites02:40

Ligand Binding Sites

Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
The Equilibrium Binding Constant and Binding Strength02:18

The Equilibrium Binding Constant and Binding Strength

The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

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Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...

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Fluorescence Anisotropy as a Tool to Study Protein-protein Interactions
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Fluorescence quenching to study protein-ligand binding: common errors.

Marco van de Weert1

  • 1Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark. mvdw@farma.ku.dk

Journal of Fluorescence
|December 10, 2009
PubMed
Summary
This summary is machine-generated.

This letter highlights inappropriate fluorescence methodology used in recent studies to determine protein ligand binding characteristics. It discusses common pitfalls to prevent the spread of incorrect methods and encourages re-evaluation of published research.

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Area of Science:

  • Biochemistry
  • Biophysics
  • Analytical Chemistry

Background:

  • Recent publications, particularly in the Journal of Fluorescence, have employed flawed fluorescence techniques for assessing protein-ligand binding.
  • These methods often lead to inaccurate conclusions regarding binding affinities and characteristics.

Discussion:

  • This letter critically examines common methodological errors in fluorescence-based protein-ligand binding assays.
  • Specific attention is given to pitfalls illustrated in two recent publications (Wang et al. 2009; Ding et al. 2009).

Key Insights:

  • Inappropriate fluorescence methodology can significantly misrepresent protein-ligand binding data.
  • Standardized and validated fluorescence protocols are crucial for reliable biochemical and biophysical research.

Outlook:

  • The aim is to curb the dissemination of incorrect fluorescence methodologies in scientific literature.
  • This work advocates for a critical reappraisal of previously published studies that utilized similar flawed approaches.