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Membrane protein reconstitution into giant unilamellar vesicles: a review on current techniques

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Abstract

Studying membrane proteins at the molecular level represents a major challenge in biochemistry due to the complexity of the membrane in which they are embedded. As an important step towards a detailed understanding of their action and molecular functioning, current studies focus on membrane proteins reconstituted into artificial lipid environments. Such reconstituted systems allow for a more flexible choice of biochemical, biophysical, and microscopy techniques for characterizing the proteins. This review gives an overview of the methods currently available for reconstituting membrane proteins in a functional state into giant unilamellar vesicles, and discusses some key methods to verify successful reconstitution.

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Abbreviations

AFM:

Atomic force microscopy

AC-electric field:

Alternate current-electric field

BR:

Bacteriorhodopsin

DIC:

Differential interference contrast

GPMVs:

Giant plasma membrane vesicles

GUVs:

Giant unilamellar vesicles

ITO:

Indium tin oxide

LUVs:

Large unilamellar vesicles

PVA:

Polyvinyl alcohol

SUVs:

Small unilamellar vesicles

T m :

Miscibility temperature

VDAC:

Voltage-dependent anion channel

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Acknowledgments

Research in the authors' lab was supported by the Danish Council for Independent Research | Natural Sciences (FNU, Grant Number 1323-00297), the Research Centre ‘bioSYNergy’ funded by the UCPH Excellence Programme for Interdisciplinary Research, the Villum Foundation (Project Number VKR023115) and the Danish National Research Foundation through the PUMPKIN Centre of Excellence (DNRF85). The anonymous reviewer is thanked for critically reading the manuscript and suggesting substantial improvements.

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Correspondence to Gerdi Christine Kemmer or Thomas Günther Pomorski.

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Jørgensen, I.L., Kemmer, G.C. & Pomorski, T.G. Membrane protein reconstitution into giant unilamellar vesicles: a review on current techniques. Eur Biophys J 46, 103–119 (2017). https://doi.org/10.1007/s00249-016-1155-9

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  • DOI: https://doi.org/10.1007/s00249-016-1155-9

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