Bcl-2-related ovarian killer protein (BOK)

Isoform 1: Apoptosis regulator that functions through distinct apoptotic signaling pathways (PubMed:27076518, PubMed:15102863, PubMed:20673843). Plays a roles as pro-apoptotic protein that positively regulates intrinsic apoptotic process in a BAX- and BAK1-dependent fashion or in a BAX- and BAK1-independent way (PubMed:27076518, PubMed:15102863).

In response to endoplasmic reticulum stress promotes mitochondrial apoptosis through downstream BAX/BAK1 activation and positive regulation of PERK-mediated unfolded protein response (By similarity). Activates apoptosis independently of heterodimerization with survival- promoting BCL2 and BCL2L1 through induction of mitochondrial outer membrane permeabilization, in a BAX- and BAK1-independent fashion, in response to inhibition of ERAD-proteasome degradation system, resulting in cytochrome c release (PubMed:27076518).