Structure and function of membrane proteins encapsulated in a polymer-bound lipid bilayer


New technologies for the purification of stable membrane proteins have emerged in recent years, in particular methods that allow the preparation of membrane proteins with their native lipid environment. Here, we look at the progress achieved with the use of styrene-maleic acid copolymers (SMA) which are able to insert into biological membranes forming nanoparticles containing membrane proteins and lipids. This technology can be applied to membrane proteins from any host source, and, uniquely, allows purification without the protein ever being removed from a lipid bilayer. Not only do these SMA lipid particles (SMALPs) stabilise membrane proteins, allowing structural and functional studies, but they also offer opportunities to understand the local lipid environment of the host membrane. With any new or different method, questions inevitably arise about the integrity of the protein purified: does it retain its activity; its native structure; and ability to perform its function? How do membrane proteins within SMALPS perform in existing assays and lend themselves to analysis by established methods? We outline here recent work on the structure and function of membrane proteins that have been encapsulated like this in a polymer-bound lipid bilayer, and the potential for the future with this approach.

Publication DOI:
Divisions: College of Health & Life Sciences > School of Biosciences
College of Health & Life Sciences
College of Health & Life Sciences > School of Biosciences > Cellular and Molecular Biomedicine
Additional Information: © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Funding: BBSRC (BB/M018261/1 and BB/L00335X/1).
Uncontrolled Keywords: styrene maleic acid lipid particle,SMALP,membrane proteins,nanodiscs,lipid bilayer,detergent-free,Biophysics,Biochemistry,Cell Biology
Publication ISSN: 1879-2642
Last Modified: 23 May 2024 07:12
Date Deposited: 07 Sep 2017 09:45
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2018-04
Published Online Date: 2017-09-01
Accepted Date: 2017-08-21
Authors: Pollock, Naomi L.
Lee, Sarah C.
Patel, Jaimin H.
Gulamhussein, Aiman A.
Rothnie, Alice J. (ORCID Profile 0000-0002-4259-7015)

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