Crossref journal-article
Rockefeller University Press
The Journal of Cell Biology (291)
Abstract

Sterols are moved between cellular membranes by nonvesicular pathways whose functions are poorly understood. In yeast, one such pathway transfers sterols from the plasma membrane (PM) to the endoplasmic reticulum (ER). We show that this transport requires oxysterol-binding protein (OSBP)–related proteins (ORPs), which are a large family of conserved lipid-binding proteins. We demonstrate that a representative member of this family, Osh4p/Kes1p, specifically facilitates the nonvesicular transfer of cholesterol and ergosterol between membranes in vitro. In addition, Osh4p transfers sterols more rapidly between membranes containing phosphoinositides (PIPs), suggesting that PIPs regulate sterol transport by ORPs. We confirmed this by showing that PM to ER sterol transport slows dramatically in mutants with conditional defects in PIP biosynthesis. Our findings argue that ORPs move sterols among cellular compartments and that sterol transport and intracellular distribution are regulated by PIPs.

Bibliography

Raychaudhuri, S., Im, Y. J., Hurley, J. H., & Prinz, W. A. (2006). Nonvesicular sterol movement from plasma membrane to ER requires oxysterol-binding protein–related proteins and phosphoinositides. The Journal of Cell Biology, 173(1), 107–119.

Authors 4
  1. Sumana Raychaudhuri (first)
  2. Young Jun Im (additional)
  3. James H. Hurley (additional)
  4. William A. Prinz (additional)
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Dates
Type When
Created 19 years, 4 months ago (April 3, 2006, 8:33 p.m.)
Deposited 2 years ago (July 29, 2023, 3:26 a.m.)
Indexed 1 month ago (July 26, 2025, 5:12 a.m.)
Issued 19 years, 4 months ago (April 3, 2006)
Published 19 years, 4 months ago (April 3, 2006)
Published Online 19 years, 4 months ago (April 3, 2006)
Published Print 19 years, 4 months ago (April 10, 2006)
Funders 0

None

@article{Raychaudhuri_2006, title={Nonvesicular sterol movement from plasma membrane to ER requires oxysterol-binding protein–related proteins and phosphoinositides}, volume={173}, ISSN={0021-9525}, url={http://dx.doi.org/10.1083/jcb.200510084}, DOI={10.1083/jcb.200510084}, number={1}, journal={The Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Raychaudhuri, Sumana and Im, Young Jun and Hurley, James H. and Prinz, William A.}, year={2006}, month=apr, pages={107–119} }