Journal
BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES
Volume 1808, Issue 1, Pages 19-25Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.bbamem.2010.10.013
Keywords
25-NBD-cholesterol; Cholesterol domain; Cholesterol transbilayer dimer; Dehydroergosterol; Membrane curvature; Membrane thickness
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Funding
- Council of Scientific and Industrial Research, Govt. of India
- Council of Scientific and Industrial Research
- Dept. Science and Technology, Govt. of India
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Cholesterol is an essential and representative lipid in higher eukaryotic cellular membranes and is often found distributed nonrandomly in domains in biological membranes. A large body of literature exists on the organization of cholesterol in plasma membranes or membranes with high cholesterol content. However, very little is known about organization of cholesterol in membranes containing low amounts of cholesterol such as the endoplasmic reticulum or inner mitochondrial membranes. In this review, we have traced the discovery and subsequent development of the concept of transbilayer cholesterol dimers (domains) in membranes at low concentrations. We have further discussed the role of membrane curvature and thickness on the transbilayer organization of cholesterol. Interestingly, this type of cholesterol organization could be relevant in cellular sorting and trafficking, and in pathological conditions. (C) 2010 Elsevier B.V. All rights reserved.
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