Bifunctional apoptosis regulator (BFAR)

Bifunctional apoptosis regulator (BFAR) is a membrane-bound, endoplasmic reticulum-associated E3 ubiquitin ligase containing a RING finger domain and additional regulatory domains[1][3][4]. It exerts anti-apoptotic functions by inhibiting apoptotic pathways activated by both mitochondrial factors and death receptors[3][5]. BFAR promotes ubiquitination and degradation of specific substrate proteins such as PNPLA3—a factor implicated in lipid metabolism and fatty liver disease[1]—and the Bax inhibitor-1 (BI-1), thereby modulating responses to ER stress and unfolded protein response signaling[3][4]. It is highly expressed in neuronal tissues and protects neurons against a broad range of apoptotic stimuli[5]. BFAR's activity links it to disease roles in cancer, neurodegeneration, and metabolic conditions, but it is not currently a direct target for any approved therapeutic drugs[3][5].

Other names

BFARBARRNF47RING finger protein 47bifunctional apoptosis inhibitor

Enhancement or inhibition of ubiquitin ligase activity to regulate substrate degradation Modulation of apoptosis through negative regulation (anti-apoptotic role) Regulation of ER stress responses and unfolded protein response signaling