Transcriptional activator HAC1
Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Transcriptional activator involved in the unfolded protein response (UPR) pathway. Recognizes and binds to the UPR element (UPRE) in the promoter of UPR-regulated genes such as KAR2, PDI1, EUG1 and FKB2. Increases the synthesis of endoplasmic reticulum-resident proteins required for protein folding as well as components of the secretory pathway.
Belongs to the bZIP family.