Abstract
Density gradient ultracentrifugation (DGUC) is widely used for physical isolation (enrichment rather than purification) of subcellular membrane vesicles. It has been a valuable tool to study specific subcellular localization and dynamic trafficking of proteins. While sucrose has been the main component of density gradients, several years ago, synthetic OptiPrep™ (iodixanol) began being used for separation of organelles due to its iso-osmotic property. Here, we describe a detailed protocol for density gradient fractionation of various mammalian subcellular vesicles, including endoplasmic reticulum (ER), Golgi apparatus, endosomes, and lipid rafts, as well as apical and basolateral membranes of polarized epithelial cells.
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Ngsee JK, Trimble WS, Elferink LA et al (1990) Molecular analysis of proteins associated with the synaptic vesicle membrane. Cold Spring Harb Symp Quant Biol 55:111–118
Li X, Sze H (1999) A 100 kDa polypeptide associates with the V0 membrane sector but not with the active oat vacuolar H(+)-ATPase, suggesting a role in assembly. Plant J 17:19–30
Huber LA, Pfaller K, Vietor I (2003) Organelle proteomics: implications for subcellular fractionation in proteomics. Circ Res 92:962–968
Gutwein P, Stoeck A, Riedle S et al (2005) Cleavage of L1 in exosomes and apoptotic membrane vesicles released from ovarian carcinoma cells. Clin Cancer Res 11:2492–2501
Ford T, Graham J, Rickwood D (1994) Iodixanol: a nonionic iso-osmotic centrifugation medium for the formation of self-generated gradients. Anal Biochem 220:360–366
Graham J, Ford T, Rickwood D (1994) The preparation of subcellular organelles from mouse liver in self-generated gradients of iodixanol. Anal Biochem 220:367–373
Li X, Galli T, Leu S et al (2001) Na + -H + exchanger 3 (NHE3) is present in lipid rafts in the rabbit ileal brush border: a role for rafts in trafficking and rapid stimulation of NHE3. J Physiol 537:537–552
Li X, Leu S, Cheong A et al (2004) Akt2, phosphatidylinositol 3-kinase, and PTEN are in lipid rafts of intestinal cells: role in absorption and differentiation. Gastroenterology 126:122–135
Janecki AJ, Montrose MH, Tse CM, de Medina FS, Zweibaum A, Donowitz M (1999) Development of an endogenous epithelial Na(+)/H(+) exchanger (NHE3) in three clones of caco-2 cells. Am J Physiol 277:G292–G305
Cohen ME, Wesolek J, McCullen J et al (1991) Carbachol- and elevated Ca(2+)-induced translocation of functionally active protein kinase C to the brush border of rabbit ileal Na + absorbing cells. J Clin Invest 88:855–863
Simons K, Toomre D (2000) Lipid rafts and signal transduction. Nat Rev Mol Cell Biol 1:31–39
Simons K, Vaz WL (2004) Model systems, lipid rafts, and cell membranes. Annu Rev Biophys Biomol Struct 33:269–295
Brown DA (2006) Lipid rafts, detergent-resistant membranes, and raft targeting signals. Physiology (Bethesda) 21:430–439
Lusa S, Blom TS, Eskelinen EL et al (2001) Depletion of rafts in late endocytic membranes is controlled by NPC1- dependent recycling of cholesterol to the plasma membrane. J Cell Sci 114:1893–1900
Lafont F, Verkade P, Galli T, Wimmer C, Louvard D, Simons K (1999) Raft association of SNAP receptors acting in apical trafficking in Madin-Darby canine kidney cells. Proc Natl Acad Sci U S A 96:3734–3738
Bagnat M, Keranen S, Shevchenko A, Shevchenko A, Simons K (2000) Lipid rafts function in biosynthetic delivery of proteins to the cell surface in yeast. Proc Natl Acad Sci U S A 97:3254–3259
Fullekrug J, Simons K (2004) Lipid rafts and apical membrane traffic. Ann N Y Acad Sci 1014:164–169
Acknowledgments
This work is supported by in part by the National Institutes of Health, NIDDK Grants KO1-DK62264, RO1-DK26523, RO1-DK61765, PO1-DK44484, PO1-DK72084, R24-DK64388, Broad Medical Research Program Grant (IBD-0119R2), and the Hopkins Center for Epithelial Disorders. We thank the Elsevier Inc. for permission to reuse the figures originally published in its journal Gastroenterology.
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Li, X., Donowitz, M. (2014). Fractionation of Subcellular Membrane Vesicles of Epithelial and Non-epithelial Cells by OptiPrep™ Density Gradient Ultracentrifugation. In: Ivanov, A. (eds) Exocytosis and Endocytosis. Methods in Molecular Biology, vol 1174. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-0944-5_6
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DOI: https://doi.org/10.1007/978-1-4939-0944-5_6
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Publisher Name: Humana Press, New York, NY
Print ISBN: 978-1-4939-0943-8
Online ISBN: 978-1-4939-0944-5
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