1234-Nanodomain Partitioning in Lipid Droplet Targeting

Paper Talk · Jul 5, 2026 · 19m

This research clarifies how membrane proteins move from the endoplasmic reticulum to lipid droplets and accumulate there to manage cellular metabolism. Using advanced single-molecule tracking, the authors demonstrate that proteins like GPAT4 and HSD17B13 move across stable seipin-mediated membrane bridges in a bidirectional manner. While these proteins diffuse at similar speeds in both organelles, they become nano-confined upon reaching the lipid droplet surface. This concentration is driven by specific amino acid residues that interact with local membrane nanodomains, effectively trapping…