Is an ortholog of human ERO1A (endoplasmic reticulum oxidoreductase 1 alpha) and ERO1B (endoplasmic reticulum oxidoreductase 1 beta). Is predicted to have protein disulfide isomerase activity and protein disulfide oxidoreductase activity. Is involved in IRE1-mediated unfolded protein response and protein folding in endoplasmic reticulum.