Derlin-1 (DERL1)

Derlin-1 is an endoplasmic reticulum (ER) membrane protein that forms part of the ER-associated degradation (ERAD) machinery, responsible for recognizing and transporting misfolded or unfolded proteins from the ER lumen and membrane into the cytosol for degradation by the ubiquitin-proteasome system[1][3][4]. Structurally, it assembles as a homotetramer to create a protein channel traversing the ER membrane, with a central tunnel capable of accommodating translocating peptides[1][3]. Derlin-1 belongs to the rhomboid-like family but is a catalytically inactive pseudoprotease, acting as a scaffold and functional partner for key ERAD components including the AAA ATPase p97/VCP and various E3 ubiquitin ligases[4][5]. It plays a critical role not only in general protein quality control but also in facilitating immune evasion by certain viruses and the retrotranslocation of specific bacterial toxins such as cholera toxin[2]. Pathologically, its dysregulation or overexpression has been observed in cancer, some neurodegenerative diseases, and viral infections, making it a protein of interest for potential therapeutic targeting and biomarker development. No approved drugs directly target Derlin-1, and its essential role in cellular homeostasis raises concern over safety and selectivity for any future interventions.

Other names

Derlin-1DERL1DER1Degradation in endoplasmic reticulum protein 1Der1-like protein 1DERtrin-1UNQ243/PRO276MGC3067PRO2577FLJ13784DER-1

Not applicable; Derlin-1 is not the target of approved drugs. Experimental modulation: inhibition of retrotranslocation (dominant-negative effect), alteration of ERAD efficiency, interference with protein-protein interactions (e.g., with p97/VCP, PDI, E3 ligases)