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 (By similarity) . Appears to act as a link between growth factor receptor signaling and the apoptotic pathways. ,online information:Bcl 2-associated death promoter entry ,PTM:Phosphorylated on one or more of Ser-75 , Ser-99 , Ser-118 and Ser-134 in response to survival stimuli , which blocks its pro-apoptotic activity. Phosphorylation on Ser-99 or Ser-75 promotes heterodimerization with 14-3-3 proteins. This interaction then facilitates the phosphorylation at Ser-118 , a site within the BH3 motif , leading to the release of Bcl-X (L) and the promotion of cell survival. Ser-99 is the major site of AKT/PKB phosphorylation , Ser-118 the major site of protein kinase A (CAPK) phosphorylation. ,similarity:Belongs to the Bcl-2 family. ,subcellular location:Upon phosphorylation , locates to the cytoplasm. ,subunit:Forms heterodimers with the anti-apoptotic proteins , Bcl-X (L) , Bcl-2 and Bcl-W. Also binds protein S100A10 (By similarity) . The Ser-75/Ser-99 phosphorylated form binds 14-3-3 proteins. ,tissue specificity:Expressed in a wide variety of tissues. ,
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