APBB1 Polyclonal Antibody

function:Adapter protein that forms a transcriptionally active complex with the gamma-secretase-derived amyloid precursor protein (APP) intracellular domain. Plays a central role in the response to DNA damage by translocating to the nucleus and inducing apoptosis. May act by specifically recognizing and binding histone H2AX phosphorylated on 'Tyr-142' (H2AXY142ph) at double-strand breaks (DSBs), recruiting other pro-apoptosis factors such as MAPK8/JNK1. Required for histone H4 acetylation at double-strand breaks (DSBs). Its ability to specifically bind modified histones and chromatin modifying enzymes such as HTATIP/TIP60, probably explains its trancription activation activity.,PTM:Phosphorylated following nuclear translocation. Phosphorylation at Tyr-546 enhances the transcription activation activity and reduces the affinity with RASD1/DEXRAS1.,similarity:Contains 1 WW domain.,similarity:Contains 2 PID domains.,subcellular location:In normal conditions, it mainly localizes to the cytoplasm, while a small fraction is tethered to the cell membrane via its interaction with APP. Following exposure to DNA damaging agents, it is released from cell membrane and translocates to the nucleus. Nuclear translocation is under the regulation of APP.,subunit:Component of a complex, at least composed of APBB1, RASD1/DEXRAS1 and APP. Interacts (via PID domain 2) with APP (with the intracellular domain of the beta-amyloid precursor protein). Interacts (via PID domain 2) with RASD1/DEXRAS1; impairs the trancription activation activity. Interacts (via PID domain 1) with HTATIP/TIP60. Interacts (via the WW domain) with proline-rich regions of APBB1IP and ENAH (By similarity). Interacts (via the WW domain) with histone H2AX (when phosphorylated on 'Tyr-142). Interacts with MAPK8.,tissue specificity:Highly expressed in brain.,