Proteins are degraded from the ER by endoplasmic reticulum-associated degradation (ERAD). In a recent issue of Molecular Cell, Fleig et al. (2012) describe a role for a ubiquitin-binding rhomboid protease, RHBDL4, in degradation of select ERAD substrates. These findings and the significance of rhomboids and other intramembrane proteases are discussed.
Copyright © 2012 Elsevier Inc. All rights reserved.