Ancient ubiquitous protein-1 mediates sterol-induced ubiquitination of 3-hydroxy-3-methylglutaryl CoA reductase in lipid droplet-associated endoplasmic reticulum membranes.
Jo Y, Hartman IZ, DeBose-Boyd RA. Mol Biol Cell. 2013 Feb; 24(3):169-83. Epub 2012 Dec 5.