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Kinnun JJ, Scott HL, Bolmatov D, Collier CP, Charlton TR, Katsaras J. Biophysical studies of lipid nanodomains using different physical characterization techniques. Biophys J 2023; 122:931-949. [PMID: 36698312 PMCID: PMC10111277 DOI: 10.1016/j.bpj.2023.01.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 01/12/2023] [Accepted: 01/19/2023] [Indexed: 01/26/2023] Open
Abstract
For the past 50 years, evidence for the existence of functional lipid domains has been steadily accumulating. Although the notion of functional lipid domains, also known as "lipid rafts," is now widely accepted, this was not always the case. This ambiguity surrounding lipid domains could be partly attributed to the fact that they are highly dynamic, nanoscopic structures. Since most commonly used techniques are sensitive to microscale structural features, it is therefore, not surprising that it took some time to reach a consensus regarding their existence. In this review article, we will discuss studies that have used techniques that are inherently sensitive to nanoscopic structural features (i.e., neutron scatting, nuclear magnetic resonance, and Förster resonance energy transfer). We will also mention techniques that may be of use in the future (i.e., cryoelectron microscopy, droplet interface bilayers, inelastic x-ray scattering, and neutron reflectometry), which can further our understanding of the different and unique physicochemical properties of nanoscopic lipid domains.
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Affiliation(s)
- Jacob J Kinnun
- Large Scale Structures Group, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee; Shull Wollan Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee.
| | - Haden L Scott
- Large Scale Structures Group, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee; Shull Wollan Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - Dima Bolmatov
- Shull Wollan Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee
| | - C Patrick Collier
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - Timothy R Charlton
- Large Scale Structures Group, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | - John Katsaras
- Shull Wollan Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee; Labs and Soft Matter Group, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee.
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Rondelli V, Brocca P, Tranquilli N, Fragneto G, Del Favero E, Cantù L. Building a biomimetic membrane for neutron reflectivity investigation: Complexity, asymmetry and contrast. Biophys Chem 2017; 229:135-141. [PMID: 28499578 DOI: 10.1016/j.bpc.2017.04.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 04/28/2017] [Accepted: 04/28/2017] [Indexed: 11/25/2022]
Abstract
The preparation and investigation of model membranes is deserving growing interest both for the physics of complex systems, and for biology. The need of simplified models should preserve mimicking the qualifying characteristics of biological membranes, and keep non-invasive and detailed description. As a main feature, biological membranes are non-homogeneous in the disposition of components, both in the lateral and in the transverse direction. We prepared asymmetric supported membranes containing GM1 ganglioside in biomimetic proportion according to different protocols. Then, we studied their internal structure by neutron reflectometry, providing few-Angstrom sensitivity in the cross direction meanwhile avoiding radiation damage. This technique can also be profitably applied to study interactions at the membrane surface. The best protocol has proven to be the Langmuir-Blodgett/Langmuir-Schaefer depositions. Notably, also the simpler and most accessible protocol of vesicle fusion was found to be suitable for straightforward and good quality deposition of compositionally asymmetric membranes.
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Affiliation(s)
- Valeria Rondelli
- Università degli Studi di Milano, BIOMETRA, Via F.lli Cervi, 93, 20090 Segrate, Italy.
| | - Paola Brocca
- Università degli Studi di Milano, BIOMETRA, Via F.lli Cervi, 93, 20090 Segrate, Italy
| | - Nicola Tranquilli
- Università degli Studi di Milano, BIOMETRA, Via F.lli Cervi, 93, 20090 Segrate, Italy
| | - Giovanna Fragneto
- Institut Laue-Langevin, 71 Avenue des Martyrs, BP 156, 38000 Grenoble Cedex, France
| | - Elena Del Favero
- Università degli Studi di Milano, BIOMETRA, Via F.lli Cervi, 93, 20090 Segrate, Italy
| | - Laura Cantù
- Università degli Studi di Milano, BIOMETRA, Via F.lli Cervi, 93, 20090 Segrate, Italy
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Russell RA, Garvey CJ, Darwish TA, Foster LJR, Holden PJ. Biopolymer Deuteration for Neutron Scattering and Other Isotope-Sensitive Techniques. Methods Enzymol 2015; 565:97-121. [DOI: 10.1016/bs.mie.2015.06.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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The effect of deuteration on the structure of bacterial cellulose. Carbohydr Res 2013; 374:82-8. [DOI: 10.1016/j.carres.2013.04.009] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 04/09/2013] [Accepted: 04/10/2013] [Indexed: 11/19/2022]
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Smyth TJ, Perfumo A, Marchant R, Banat IM, Chen M, Thomas RK, Penfold J, Stevenson PS, Parry NJ. Directed microbial biosynthesis of deuterated biosurfactants and potential future application to other bioactive molecules. Appl Microbiol Biotechnol 2010; 87:1347-54. [DOI: 10.1007/s00253-010-2592-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Revised: 03/26/2010] [Accepted: 03/27/2010] [Indexed: 11/24/2022]
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