Beyond detergent micelles: The advantages and applications of non-micellar and lipid-based membrane mimetics for solution-state NMR
- PMID: 31779883
- DOI: 10.1016/j.pnmrs.2019.08.001
Beyond detergent micelles: The advantages and applications of non-micellar and lipid-based membrane mimetics for solution-state NMR
Abstract
Membrane proteins are important players in signal transduction and the exchange of metabolites within or between cells. Thus, this protein class is the target of around 60 % of currently marketed drugs, emphasizing their essential biological role. Besides functional assays, structural and dynamical investigations on this protein class are crucial to fully understanding their functionality. Even though X-ray crystallography and electron microscopy are the main methods to determine structures of membrane proteins and their complexes, NMR spectroscopy can contribute essential information on systems that (a) do not crystallize and (b) are too small for EM. Furthermore, NMR is a versatile tool for monitoring functional dynamics of biomolecules at various time scales. A crucial aspect of such studies is the use of a membrane mimetic that resembles a native environment and thus enables the extraction of functional insights. In recent decades, the membrane protein NMR community has moved from rather harsh detergents to membrane systems having more native-like properties. In particular, most recently phospholipid nanodiscs have been developed and optimized mainly for solution-state NMR but are now also being used for solid-state NMR spectroscopy. Nanodiscs consist of a patch of a planar lipid bilayer that is encircled by different (bio-)polymers to form particles of defined and tunable size. In this review, we provide an overview of available membrane mimetics, including nanodiscs, amphipols and bicelles, that are suitable for high-resolution NMR spectroscopy and describe how these advanced membrane mimetics can facilitate NMR studies on the structure and dynamics of membrane proteins. Since the stability of membrane proteins depends critically on the chosen membrane mimetic, we emphasize the importance of a suitable system that is not necessarily developed for solution-state NMR applications and hence requires optimization for each membrane protein. However, lipid-based membrane mimetics offer the possibility of performing NMR experiments at elevated temperatures and studying ligand and partner protein complexes as well as their functional dynamics in a realistic membrane environment. In order to be able to make an informed decision during the selection of a suitable membrane system, we provide a detailed overview of the available options for various membrane protein classes and thereby facilitate this often-difficult selection process for a broad range of desired NMR applications.
Keywords: Lipids; Membrane proteins; NMR; Nanodiscs; Structure.
Copyright © 2019 Elsevier B.V. All rights reserved.
Similar articles
-
Choosing membrane mimetics for NMR structural studies of transmembrane proteins.Biochim Biophys Acta. 2011 Aug;1808(8):1957-74. doi: 10.1016/j.bbamem.2011.03.016. Epub 2011 Apr 6. Biochim Biophys Acta. 2011. PMID: 21477581 Review.
-
Solution structure and oligomeric state of the E. coliglycerol facilitator.Biochim Biophys Acta Biomembr. 2020 May 1;1862(5):183191. doi: 10.1016/j.bbamem.2020.183191. Epub 2020 Jan 15. Biochim Biophys Acta Biomembr. 2020. PMID: 31953232
-
Characterization of fast-tumbling isotropic bicelles by PFG diffusion NMR.Magn Reson Chem. 2017 May;55(5):395-404. doi: 10.1002/mrc.4399. Epub 2015 Dec 14. Magn Reson Chem. 2017. PMID: 26662467 Review.
-
Optimizing nanodiscs and bicelles for solution NMR studies of two β-barrel membrane proteins.J Biomol NMR. 2015 Apr;61(3-4):261-74. doi: 10.1007/s10858-015-9905-z. Epub 2015 Feb 10. J Biomol NMR. 2015. PMID: 25869397 Free PMC article.
-
Lipid Nanodiscs for High-Resolution NMR Studies of Membrane Proteins.Chem Rev. 2022 May 25;122(10):9395-9421. doi: 10.1021/acs.chemrev.1c00702. Epub 2021 Oct 19. Chem Rev. 2022. PMID: 34665588 Review.
Cited by
-
Membrane Interactions of the Peroxisomal Proteins PEX5 and PEX14.Front Cell Dev Biol. 2021 Apr 16;9:651449. doi: 10.3389/fcell.2021.651449. eCollection 2021. Front Cell Dev Biol. 2021. PMID: 33937250 Free PMC article.
-
NMR sample optimization and backbone assignment of a stabilized neurotensin receptor.J Struct Biol. 2023 Jun;215(2):107970. doi: 10.1016/j.jsb.2023.107970. Epub 2023 May 3. J Struct Biol. 2023. PMID: 37142193 Free PMC article.
-
High-resolution analysis of the conformational transition of pro-apoptotic Bak at the lipid membrane.EMBO J. 2021 Oct 18;40(20):e107159. doi: 10.15252/embj.2020107159. Epub 2021 Sep 15. EMBO J. 2021. PMID: 34523144 Free PMC article.
-
Ligandability at the Membrane Interface of GPx4 Revealed through a Reverse Micelle Fragment Screening Platform.JACS Au. 2024 Jun 26;4(7):2676-2686. doi: 10.1021/jacsau.4c00427. eCollection 2024 Jul 22. JACS Au. 2024. PMID: 39055139 Free PMC article.
-
γ-Secretase cleavage of the Alzheimer risk factor TREM2 is determined by its intrinsic structural dynamics.EMBO J. 2020 Oct 15;39(20):e104247. doi: 10.15252/embj.2019104247. Epub 2020 Aug 24. EMBO J. 2020. PMID: 32830336 Free PMC article.
Publication types
MeSH terms
Substances
LinkOut - more resources
Full Text Sources