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Influence of the membrane environment on cholesterol transfer

Journal Article · · Journal of Lipid Research
DOI:https://doi.org/10.1194/jlr.m077909· OSTI ID:2469522
 [1];  [1];  [1];  [2];  [1]
  1. Univ. of Illinois, Chicago, IL (United States)
  2. Inst. Laue-Langevin (ILL), Grenoble (France)
Cholesterol, an essential component in biological membranes, is highly unevenly distributed within the cell, with most localized in the plasma membrane while only a small fraction is found in the endoplasmic reticulum, where it is synthesized. Cellular membranes differ in lipid composition and protein content, and these differences can exist across their leaflets too. This thermodynamic landscape that cellular membranes impose on cholesterol is expected to modulate its transport. To uncover the role the membrane environment has on cholesterol inter- and intra-membrane movement, we used time-resolved small angle neutron scattering to study the passive movement of cholesterol between and within membranes with varying degrees of saturation content. We found that cholesterol moves systematically slower as the degree of saturation in the membranes increases, from a palmitoyl oleyl phosphotidylcholine membrane, which is unsaturated, to a dipalmitoylphosphatidylcholine (DPPC) membrane, which is fully saturated. Additionally, we found that the energetic barrier to move cholesterol in these phosphatidylcholine membranes is independent of their relative lipid composition and remains constant for both flip-flop and exchange at ~100 kJ/mol. Further, by replacing DPPC with the saturated lipid palmitoylsphingomyelin, an abundant saturated lipid of the outer leaflet of the plasma membrane, we found the rates decreased by a factor of two. This finding is in stark contrast with recent molecular dynamic simulations that predict a dramatic slow-down of seven orders of magnitude for cholesterol flipping in membranes with a similar phosphocholine and SM lipid composition.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2469522
Journal Information:
Journal of Lipid Research, Journal Name: Journal of Lipid Research Journal Issue: 12 Vol. 58; ISSN 0022-2275
Publisher:
American Society for Biochemistry and Molecular BiologyCopyright Statement
Country of Publication:
United States
Language:
English

References (45)

Model studies of lipid flip-flop in membranes
  • Parisio, Giulia; Ferrarini, Alberta; Sperotto, Maria Maddalena
  • International Journal of Advances in Engineering Sciences and Applied Mathematics, Vol. 8, Issue 2 https://doi.org/10.1007/s12572-015-0155-9
journal January 2016
Transbilayer diffusion of phospholipids: dependence on headgroup structure and acyl chain length journal February 1988
The rapid transmembrane movement of cholesterol in small unilamellar vesicles journal March 1979
Lipid intermolecular hydrogen bonding: influence on structural organization and membrane function journal October 1987
Role of cholesterol in lipid raft formation: lessons from lipid model systems journal March 2003
Cholesterol Does Not Induce Segregation of Liquid-Ordered Domains in Bilayers Modeling the Inner Leaflet of the Plasma Membrane journal November 2001
Probing Red Cell Membrane Cholesterol Movement with Cyclodextrin journal October 2002
Separation of Liquid Phases in Giant Vesicles of Ternary Mixtures of Phospholipids and Cholesterol journal November 2003
Cholesterol interactions with phospholipids in membranes journal January 2002
Intracellular sterol dynamics journal July 2009
Ordering effects of cholesterol and its analogues journal January 2009
Fluid phase lipid areas and bilayer thicknesses of commonly used phosphatidylcholines as a function of temperature journal November 2011
Noninvasive Neutron Scattering Measurements Reveal Slower Cholesterol Transport in Model Lipid Membranes journal July 2011
How Slow Is the Transbilayer Diffusion (Flip-Flop) of Cholesterol? journal February 2012
Detailed Comparison of Deuterium Quadrupole Profiles between Sphingomyelin and Phosphatidylcholine Bilayers journal February 2014
The Many Faces of Lipid Rafts journal May 2014
The effect of variations in phospholipid and sterol structure on the nature of lipid–sterol interactions in lipid bilayer model membranes journal June 2010
Revisiting transbilayer distribution of lipids in the plasma membrane journal January 2016
The Continuing Mystery of Lipid Rafts journal December 2016
Lipid somersaults: Uncovering the mechanisms of protein-mediated lipid flipping journal October 2016
The Ins and Outs of Lipid Flip-Flop journal December 2016
Examination of Mixtures Containing Sphingomyelin and Cholesterol by Molecular Dynamics Simulations journal April 2017
Reconciling Differences between Lipid Transfer in Free-Standing and Solid Supported Membranes: A Time-Resolved Small-Angle Neutron Scattering Study journal March 2017
1 H NMR Shows Slow Phospholipid Flip-Flop in Gel and Fluid Bilayers journal February 2017
Interaction of cholesterol with various glycerophospholipids and sphingomyelin journal November 1990
Development of transition-state theory journal July 1983
Flip-Flop of Steroids in Phospholipid Bilayers: Effects of the Chemical Structure on Transbilayer Diffusion journal July 2012
Molecular View of Cholesterol Flip-Flop and Chemical Potential in Different Membrane Environments journal September 2009
How proteins move lipids and lipids move proteins journal July 2001
Role of cholesterol and lipid organization in disease journal November 2005
Orthogonal lipid sensors identify transbilayer asymmetry of plasma membrane cholesterol journal December 2016
Membrane lipids: where they are and how they behave journal February 2008
Cellular cholesterol trafficking and compartmentalization journal February 2008
Non-vesicular lipid transport by lipid-transfer proteins and beyond journal September 2010
Cholesterol solubility limit in lipid membranes probed by small angle neutron scattering and MD simulations journal January 2014
Reply to the ‘Comment on “Cholesterol Solubility Limit in Lipid Membranes probed by Small Angle Neutron Scattering and MD simulations”’ by R. Epand, Soft Matter, 2015, 11, DOI: 10.1039/C4SM02819H journal January 2015
Thermodynamics of flip-flop and desorption for a systematic series of phosphatidylcholine lipids journal January 2009
The Activated Complex in Chemical Reactions journal February 1935
Fast flip-flop of cholesterol and fatty acids in membranes: implications for membrane transport proteins journal January 2003
Nonvesicular Lipid Transfer from the Endoplasmic Reticulum journal October 2012
Determination of Interbilayer and Transbilayer Lipid Transfers by Time-Resolved Small-Angle Neutron Scattering journal June 2007
Molecular simulation of rapid translocation of cholesterol, diacylglycerol, and ceramide in model raft and nonraft membranes journal January 2012
Membrane phospholipid synthesis and endoplasmic reticulum function journal January 2009
Sphingolipid organization in biomembranes: what physical studies of model membranes reveal journal January 1998
Interplay of Unsaturated Phospholipids and Cholesterol in Membranes: Effect of the Double-Bond Position journal October 2008