BH3结构域凋亡诱导蛋白重组兔单抗

BID

BH3-interacting domain death agonist

Forms heterodimers either with the pro-apoptotic protein BAX or the anti-apoptotic protein Bcl-2.

Cytoplasm (By similarity). Mitochondrion membrane. Note=When uncleaved, it is predominantly cytoplasmic. BH3-interacting domain death agonist p15: Mitochondrion membrane. Note=Translocates to mitochondria as an integral membrane protein. BH3-interacting domain death agonist p13: Mitochondrion membrane. Note=Associated with the mitochondrial membran. Isoform 1: Cytoplasm. Isoform 3: Cytoplasm. Isoform 2: Mitochondrion membrane. Note=A significant proportion of isoform 2 localizes to mitochondria, it may be cleaved constitutively.

Isoform 2 and isoform 3 are expressed in spleen, bone marrow, cerebral and cerebellar cortex. Isoform 2 is expressed in spleen, pancreas and placenta (at protein level). Isoform 3 is expressed in lung, pancreas and spleen (at protein level). Isoform 4 is expressed in lung and pancreas (at protein level).

TNF-alpha induces a caspase-mediated cleavage of p22 BID into a major p15 and minor p13 and p11 products.
Phosphorylated upon DNA damage, probably by ATM or ATR.

The major proteolytic product p15 BID allows the release of cytochrome c. Isoform 1, isoform 2 and isoform 4 induce ICE-like proteases and apoptosis. Isoform 3 does not induce apoptosis. Counters the protective effect of Bcl-2.