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Related Concept Videos

Detergent Purification of Membrane Proteins01:18

Detergent Purification of Membrane Proteins

Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
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Overview
Protein Folding01:25

Protein Folding

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Enrichment of Detergent-insoluble Protein Aggregates from Human Postmortem Brain
09:35

Enrichment of Detergent-insoluble Protein Aggregates from Human Postmortem Brain

Published on: October 24, 2017

Detergent-mediated protein aggregation.

Chris Neale1, Hamed Ghanei, John Holyoake

  • 1Molecular Structure and Function, The Hospital for Sick Children, 555 University Avenue, Toronto, Ontario M5G 1X8, Canada.

Chemistry and Physics of Lipids
|March 8, 2013
PubMed
Summary
This summary is machine-generated.

Detergents used for membrane protein structural studies can unexpectedly cause protein aggregation. This study reveals how dodecylphosphocholine detergent mediates PagP protein aggregation through headgroup interactions, impacting structural evaluations.

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Last Updated: May 13, 2026

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08:59

4D Imaging of Protein Aggregation in Live Cells

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Computational Biophysics

Background:

  • Detergents are essential for solubilizing membrane proteins for structural analysis.
  • Understanding detergent-induced conformational changes and aggregation is crucial for accurate structural determination.

Purpose of the Study:

  • To investigate the self-assembly of dodecylphosphocholine (DPC) detergent around the integral membrane protein PagP.
  • To elucidate the mechanism of detergent-mediated protein aggregation.

Main Methods:

  • Six 500-ns molecular dynamics simulations of PagP in DPC micelles (>600,000 atoms).
  • Analysis of protein-detergent and protein-protein interactions.
  • Comparison with dynamic light scattering experiments.

Main Results:

  • DPC formed equatorial micelles around PagP, consistent with existing models.
  • Unexpectedly, PagP apical surfaces interacted with detergent headgroups in other micelles, forming stable complexes.
  • Detergent-mediated non-specific aggregation of folded PagP was observed, with PagP molecules interacting with each other via detergent micelles.

Conclusions:

  • Detergent solvation of membrane proteins can lead to non-specific aggregation.
  • This aggregation mechanism, mediated by detergent headgroup interactions, may be a general phenomenon affecting membrane protein studies.
  • Findings highlight the importance of considering detergent-induced artifacts in structural biology.