Bad phospho S128
Domain
Intact BH3 motif is required by BIK, BID, BAK, BAD and BAX for their pro-apoptotic activity and for their interaction with anti-apoptotic members of the Bcl-2 family.
Function
Promotes cell death. Successfully competes for the binding to Bcl-X(L), Bcl-2 and Bcl-W, thereby affecting the level of heterodimerization of these proteins with BAX. Can reverse the death repressor activity of Bcl-X(L), but not that of Bcl-2. Appears to act as a link between growth factor receptor signaling and the apoptotic pathways.
Post-translational modifications
Phosphorylated on one or more of Ser-112, Ser-136, Ser-155 and Ser-170 in response to survival stimuli, which blocks its pro-apoptotic activity. Phosphorylation on Ser-136 or Ser-112 promotes heterodimerization with 14-3-3 proteins. This interaction then facilitates the phosphorylation at Ser-155, a site within the BH3 motif, leading to the release of Bcl-X(L) and the promotion of cell survival. Ser-136 is the major site of AKT/PKB phosphorylation, Ser-155 the major site of protein kinase A (CAPK) phosphorylation.
Methylation at Arg-131 and Arg-133 by PRMT1 inhibits Akt-mediated phosphorylation at Ser-136.
Sequence Similarities
Belongs to the Bcl-2 family.
Cellular localization
- Mitochondrion outer membrane
- Cytoplasm
- Colocalizes with HIF3A isoform 2 in the cytoplasm (PubMed:21546903). Upon phosphorylation, locates to the cytoplasm.
Alternative names
Bbc6, Bad, Bcl2-associated agonist of cell death, BAD, Bcl-2-binding component 6, Bcl-xL/Bcl-2-associated death promoter, Bcl2 antagonist of cell death
Database links
Other research areas
- Immuno-oncology