Université de Fribourg

The caveolin-binding motif of the pathogen-related yeast protein Pry1, a member of the CAP protein superfamily, is required for in vivo export of cholesteryl acetate

Choudhary, Vineet ; Darwiche, Rabih ; Gfeller, David ; Zoete, Vincent ; Michielin, Olivier ; Schneiter, Roger

In: Journal of Lipid Research, 2014, vol. 55, no. 5, p. 883-894

Proteins belonging to the CAP superfamily are present in all kingdoms of life and have been implicated in different physiological processes. Their molecular mode of action, however, is poorly understood. Saccharomyces cerevisiae expresses three members of this superfamily, pathogen-related yeast (Pry)1, -2, and -3. We have recently shown that Pry function is required for the secretion of...

Université de Fribourg

Lipid droplets are functionally connected to the endoplasmic reticulum in Saccharomyces cerevisiae

Jacquier, Nicolas ; Choudhary, Vineet ; Mari, Muriel ; Toulmay, Alexandre ; Health and Human Services, Bethesda, USA ; Reggiori, Fulvio ; Schneiter, Roger

In: Journal of Cell Science, 2011, vol. 124, p. 2424-2437

Cells store metabolic energy in the form of neutral lipids that are deposited within lipid droplets (LDs). In this study, we examine the biogenesis of LDs and the transport of integral membrane proteins from the endoplasmic reticulum (ER) to newly formed LDs. In cells that lack LDs, otherwise LD-localized membrane proteins are homogenously distributed in the ER membrane. Under these conditions,...

Université de Fribourg

Monitoring sterol uptake, acetylation, and export in yeast

Choudhary, Vineet ; Schneiter, Roger

In: Methods in Molecular Biology, 2009, vol. 580, p. 221-232

Sterols are essential lipid components of eukaryotic membranes. They are synthesized in the endoplasmatic reticulum (ER) from where they are efficiently transported to the plasma membrane, which harbors ~90% of the free sterol pool of the cell. The molecular mechanisms that govern this lipid transport, however, are not well characterized and are challenging to analyze. Saccharomyces cerevisiae...