Inter-organelle lipid transfer: a channel model for Vps13 and chorein-N motif proteins.

ABSTRACT: Membrane contact sites, where two organelles are in close proximity, are critical regulators of cellular membrane homeostasis, with roles in signaling, lipid metabolism, and ion dynamics. A growing catalog of specialized lipid transfer proteins carry out lipid exchange at these sites. Currently characterized eukaryotic lipid transport proteins are shuttles that typically extract a single lipid from the membrane of the donor organelle, solubilize it during transport through the cytosol, and deposit it in the acceptor organelle membrane. Here, we highlight the recently identified chorein_N family of lipid transporters, including the Vps13 proteins and the autophagy protein Atg2. These are elongated proteins that, distinct from previously characterized transport proteins, bind tens of lipids

SUBMITTER: Lees JA 

PROVIDER: S-EPMC7885529 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature