Projects per year
Abstract
Most membrane proteins function through interactions with other proteins in the phospholipid bilayer, the cytosol or the extracellular milieu. Understanding the molecular basis of these interactions is key to understanding membrane protein function and dysfunction. Here we demonstrate for the first time how a nano-encapsulation method based on styrene maleic acid lipid particles (SMALPs) can be used in combination with native gel electrophoresis to separate membrane protein complexes in their native state. Using four model proteins, we show that this separation method provides an excellent measure of protein quaternary structure, and that the lipid environment surrounding the protein(s) can be probed using mass spectrometry. We also show that the method is complementary to immunoblotting. Finally we show that intact membrane protein-SMALPs extracted from a band on a gel could be visualised using electron microscopy (EM). Taken together these results provide a novel and elegant method for investigating membrane protein complexes in a native state.
Original language | English |
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Pages (from-to) | 1437-1445 |
Number of pages | 9 |
Journal | Biochimica et Biophysica Acta (BBA) - Biomembranes |
Volume | 1861 |
Issue number | 8 |
Early online date | 28 May 2019 |
DOIs | |
Publication status | Published - 1 Aug 2019 |
Bibliographical note
Copyright © 2019. Published by Elsevier B.V.Keywords
- Membrane protein
- Nanoparticle
- Native PAGE
- Protein complex
- SMALP
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Cell Biology
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Dive into the research topics of 'SMA-PAGE: a new method to examine complexes of membrane proteins using SMALP nano-encapsulation and native gel electrophoresis'. Together they form a unique fingerprint.Projects
- 1 Finished
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Development of an improved SMALP toolkit to extract active membrane proteins
Dafforn, T. (Principal Investigator) & Pollock, N. (Co-Investigator)
Biotechnology & Biological Sciences Research Council
1/03/19 → 28/02/22
Project: Research