Activating transcription factor 6 alpha (ATF6α)

Activating transcription factor 6 alpha (ATF6α) is a type 2 ER transmembrane transcription factor, belonging to the bZIP family, and is a core regulator of the unfolded protein response (UPR), responding to misfolded protein accumulation in the endoplasmic reticulum[1][2][6]. Following ER stress, ATF6α is transported to the Golgi apparatus, where it is proteolytically cleaved; the released cytosolic domain migrates to the nucleus and upregulates genes responsible for ER chaperones and protein folding enhancement[2][4][6]. ATF6α plays a critical role in restoring ER function and cell survival but may also participate in apoptotic pathways if stress persists; it is implicated in diseases linked to ER stress such as cancer, diabetes, neurodegeneration, and cardiovascular disease[3][4][6]. Though not yet targeted by approved drugs, ATF6α is actively investigated as a therapeutic and diagnostic target for manipulating the UPR in various pathologies[3][4].

Other names

ATF6-alphacAMP-dependent transcription factor ATF-6 alphaActivating transcription factor 6 (when isoform is unspecified, can refer to ATF6α or ATF6β)ATF6

Modulation or inhibition of ATF6α activity affects unfolded protein response signaling, cellular adaptation to ER stress, and, if overactive or blocked, may promote cell survival or death depending on context[4].