Predicted to enable several functions, including enzyme binding activity; misfolded protein binding activity; and signal recognition particle binding activity. Involved in proteasome-mediated ubiquitin-dependent protein catabolic process. Acts upstream of or within cellular response to unfolded protein. Located in early endosome; endoplasmic reticulum quality control compartment; and late endosome. Is expressed in embryo; gut; pancreas epithelium; yolk sac; and yolk sac endoderm. Orthologous to human DERL1 (derlin 1). [provided by Alliance of Genome Resources, Apr 2022]