ArticleChemistry and physics of lipids2011
Using spin-label electron paramagnetic resonance (EPR) to discriminate and characterize the cholesterol bilayer domain.
Article in Chemistry and physics of lipids, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers.
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Who cites it
57 citing papers in PubMed.
- Age-Related Lens Membrane Composition and N101D Deamidation Modulate αA-Crystallin Membrane Interactions Relevant to Cataract.Investigative ophthalmology & visual science · 2026Article
- Distinct, Phase-Dependent Orientations of GPI and GPI-Anchored Proteins in Lipid Bilayers Revealed Using Spin Labeling and Power Saturation Electron Paramagnetic Resonance Depth Profiling.Journal of the American Chemical Society · 2026Article
- Membrane Fusion-Inspired Nanomaterials: Emerging Strategies for Infectious Disease and Cancer Diagnostics.Advanced healthcare materials · 2026Review
- Temperature and cholesterol regulate the association of native bovine lens alpha-crystallin with in vitro reconstituted membranes made of synthetically prepared lipids and cholesterol.Experimental eye research · 2026Article
- Physical Properties of Lens Membranes in Animals with Different Lifespans.Biomolecules · 2025Article
- Cholesterol and Q147E Deamidation Modulates αA-Crystallin Membrane Binding Elucidating Protective Role of Lens Membrane Composition Changes With Aging.Investigative ophthalmology & visual science · 2025Article
- Association of Alpha-Crystallin with Human Cortical and Nuclear Lens Lipid Membrane Increases with the Grade of Cortical and Nuclear Cataract.International journal of molecular sciences · 2024Article
- Cholesterol Content Regulates the Interaction of αA-, αB-, and α-Crystallin with the Model of Human Lens-Lipid Membranes.International journal of molecular sciences · 2024Article
- Interaction of βInternational journal of molecular sciences · 2023Article
- Binding of βInternational journal of molecular sciences · 2023Article
- Membrane Models and Experiments Suitable for Studies of the Cholesterol Bilayer Domains.Membranes · 2023Review
- Article
- Binding of Alpha-Crystallin to Cortical and Nuclear Lens Lipid Membranes Derived from a Single Lens.International journal of molecular sciences · 2022Article
- Molecular oxygen as a probe molecule in EPR spin-labeling studies of membrane structure and dynamics.Oxygen (Basel, Switzerland) · 2022Article
- Membrane elasticity modulated by cholesterol in model of porcine eye lens-lipid membrane.Experimental eye research · 2022Article
- Multilamellar Liposomes as a Model for Biological Membranes: Saturation Recovery EPR Spin-Labeling Studies.Membranes · 2022Review
- Alpha-Crystallin Association with the Model of Human and Animal Eye Lens-Lipid Membranes is Modulated by Surface Hydrophobicity of Membranes.Current eye research · 2022Article
- Modulating Nucleus Oxygen Concentration by Altering Intramembrane Cholesterol Levels: Creating Hypoxic Nucleus in Oxic Conditions.International journal of molecular sciences · 2022Article
- Alpha-Crystallin-Membrane Association Modulated by Phospholipid Acyl Chain Length and Degree of Unsaturation.Membranes · 2022Article
- Factors determining barrier properties to oxygen transport across model and cell plasma membranes based on EPR spin-label oximetry.Applied magnetic resonance · 2021Article
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4 authors.
Funding
Abstract
Electron paramagnetic resonance (EPR) spin-labeling methods make it possible not only to discriminate the cholesterol bilayer domain (CBD) but also to obtain information about the organization and dynamics of cholesterol molecules in the CBD. The abilities of spin-label EPR were demonstrated for Chol/POPC (cholesterol/1-palmitoyl-2-oleoylphosphatidylcholine) membranes, with a Chol/POPC mixing ratio that changed from 0 to 3. Using the saturation-recovery (SR) EPR approach with cholesterol analogue spin labels, ASL and CSL, and oxygen or NiEDDA relaxation agents, it was confirmed that the CBD was present in all membrane suspensions when the mixing ratio exceeded the cholesterol solubility threshold (CST). Conventional EPR spectra of ASL and CSL in the CBD were similar to those in the surrounding POPC bilayer (which is saturated with cholesterol), indicating that in both domains, cholesterol exists in the lipid-bilayer-like structures. The behavior of ASL and CSL (and, thus, the behavior of cholesterol molecules) in the CBD was compared with that in the surrounding POPC-cholesterol domain (PCD). In the CBD, ASL and CSL molecules are better ordered than in the surrounding PCD. This difference is small and can be compared to that induced in the surrounding domain by an ~10°C decrease in temperature. Thus, cholesterol molecules are unexpectedly dynamic in the CBD, which should enhance their interaction with the surrounding domain. The polarity of the water/membrane interface of the CBD is significantly greater than that of the surrounding PCD, which significantly enhances penetration of the water-soluble relaxation agent, NiEDDA, into that region. Hydrophobicity measured in the centers of both domains is similar. The oxygen transport parameter (oxygen diffusion-concentration product) measured in the center of the CBD is about ten times smaller than that measured in the center of the surrounding domain. Thus, the CBD can form a significant barrier to oxygen transport. The results presented here point out similarities between the organization and dynamics of cholesterol molecules in the CBD and in the surrounding PCD, as well as significant differences between CBDs and cholesterol crystals.
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