DNA-binding protein that binds to the NRP-B promoter to activate the NRP-B-mediated cell death response (PubMed:21482825). Functions as an upstream component of stress-induced NRP-B-mediated signaling to connect stress in the endoplasmic reticulum (ER) to an osmotic stress-induced cell death signal (PubMed:21482825). Exhibits transactivation activity in yeast (PubMed:21482825). Induced by tunicamycin and osmotic stress.