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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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Related Experiment Video

Updated: May 20, 2026

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
10:49

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy

Published on: March 5, 2017

A Technique for Stabilizing Membrane Proteins in Nanodiscs.

Xiaomin Zeng1, Jingyi Yang2, Zixue Wang3

  • 1College of Biology, Hunan University.

Journal of Visualized Experiments : Jove
|May 18, 2026
PubMed
Summary

Nanodisc technology improves membrane protein stability for structural studies. This method successfully reconstituted the human potassium channel Task2, enabling high-resolution cryo-electron microscopy analysis.

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Co-Translational Insertion of Membrane Proteins into Preformed Nanodiscs
08:24

Co-Translational Insertion of Membrane Proteins into Preformed Nanodiscs

Published on: November 19, 2020

Related Experiment Videos

Last Updated: May 20, 2026

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
10:49

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy

Published on: March 5, 2017

Co-Translational Insertion of Membrane Proteins into Preformed Nanodiscs
08:24

Co-Translational Insertion of Membrane Proteins into Preformed Nanodiscs

Published on: November 19, 2020

Area of Science:

  • Structural biology
  • Membrane protein biophysics

Background:

  • Detergent-based extraction methods often compromise membrane protein stability, activity, and homogeneity.
  • This instability presents significant challenges for high-resolution cryo-electron microscopy (cryo-EM).

Purpose of the Study:

  • To develop a robust nanodisc reconstitution protocol for the human potassium channel Task2.
  • To validate the nanodisc-embedded Task2 for high-resolution structural analysis using cryo-EM.

Main Methods:

  • Human Task2 potassium channel was expressed, solubilized, and purified.
  • Nanodisc assembly using membrane scaffold proteins (MSPs) and phospholipids.
  • Validation via size exclusion chromatography (SEC), SDS-PAGE, and 2D/3D cryo-EM analysis.

Main Results:

  • Successful nanodisc reconstitution of Task2 was achieved.
  • SEC confirmed particle enlargement, and SDS-PAGE showed co-migration of Task2 and MSP.
  • 2D class averages displayed visible secondary structure, and initial 3D reconstruction confirmed protein integrity.

Conclusions:

  • The developed nanodisc protocol provides a reproducible workflow for Task2 reconstitution.
  • This method enhances sample purity, homogeneity, and particle quality for structural studies.
  • The approach offers a valuable framework for analyzing other challenging membrane proteins.