title: Notch1 intracellular domain suppresses APP intracellular domain-Tip60-Fe65 complex mediated signaling through physical interaction.
abstract: The amyloid beta-precursor protein (APP) and the Notch receptor are both type 1 integral transmembrane proteins, and both are cleaved by presenilin-dependent gamma-secretase activity. In this study, we have demonstrated that the Notch intracellular domain (Notch1-IC) suppresses APP-intracellular domain (AICD)-mediated ROS generation and cell death after being processed by gamma secretase. Notch1-IC physically interacts with AICD, Fe65, and Tip60, thereby disrupting the association of the AICD-Fe65-Tip60 trimeric transcription activator complex in AICD signaling. AICD-Fe65-Tip60 mediated reactive oxygen species generation was found to be suppressed by Notch1-IC. Furthermore, AICD-Fe65-Tip60 was shown to mediate cell death in human neuroblastoma cells, and the overexpression of Notch1-IC inhibited cell death induced by AICD-Fe65-Tip60. Collectively, our findings indicate that Notch1-IC plays the role of a negative regulator in AICD signaling via the disruption of the AICD-Fe65-Tip60 trimeric complex.
authors: Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Yongbong-dong, Buk-ku, Gwangju, 500-757, Republic of Korea.
authors: Sun-Yee
authors: SY
authors: Kim
authors: Mi-Yeon
authors: MY
authors: Kim
authors: Jung-Soon
authors: JS
authors: Mo
authors: Hee-Sae
authors: HS
authors: Park
mesh_terms: D053829:Amyloid Precursor Protein Secretases / Q000235:genetics / Q000378:metabolism; D016564:Amyloid beta-Protein Precursor / Q000235:genetics / Q000378:metabolism*; D000818:Animals; D045744:Cell Line, Tumor; D051548:Histone Acetyltransferases / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D000074443:Lysine Acetyltransferase 5; D051379:Mice; D046912:Multiprotein Complexes / Q000235:genetics / Q000378:metabolism*; D041681:NIH 3T3 Cells; D009419:Nerve Tissue Proteins / Q000235:genetics / Q000378:metabolism*; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism*; D053763:Presenilins / Q000235:genetics / Q000378:metabolism; D058255:Protease Nexins; D011485:Protein Binding / Q000502:physiology; D017434:Protein Structure, Tertiary / Q000502:physiology; D017382:Reactive Oxygen Species / Q000378:metabolism; D051881:Receptor, Notch1 / Q000235:genetics / Q000378:metabolism*; D011956:Receptors, Cell Surface / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction / Q000502:physiology*
chemical_list: C091042:APBB1 protein, human; C545487:APP protein, human; D016564:Amyloid beta-Protein Precursor; C486243:Apbb1 protein, mouse; D046912:Multiprotein Complexes; C497761:NOTCH1 protein, human; D009419:Nerve Tissue Proteins; C497762:Notch1 protein, mouse; D009687:Nuclear Proteins; D053763:Presenilins; D058255:Protease Nexins; D017382:Reactive Oxygen Species; D051881:Receptor, Notch1; D011956:Receptors, Cell Surface; D051548:Histone Acetyltransferases; C098489:KAT5 protein, human; D000074443:Lysine Acetyltransferase 5; D053829:Amyloid Precursor Protein Secretases