APBB1 Antibody – Goat Polyclonal

The protein encoded by this gene is a member of the Fe65 protein family. It is an adaptor protein localized in the nucleus. It interacts with the Alzheimer's disease amyloid precursor protein (APP), transcription factor CP2/LSF/LBP1 and the low-density lipoprotein receptor-related protein. APP functions as a cytosolic anchoring site that can prevent the gene product's nuclear translocation. This encoded protein could play an important role in the pathogenesis of Alzheimer's disease. It is thought to regulate transcription. Also it is observed to block cell cycle progression by downregulating thymidylate synthase expression. Multiple alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Mar 2012]

Fe65: 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 Y142 (H2AXpY142) at double-strand breaks (DSBs), recruiting other pro-apoptosis factors such as JNK1. Required for histone H4 acetylation at double-strand breaks (DSBs). Its ability to specifically bind modified histones and chromatin modifying enzymes such as TIP60, probably explains its trancription activation activity.

Protein type: Apoptosis; Transcription regulation; Adaptor/scaffold

Chromosomal Location of Human Ortholog: 11p15

Cellular Component: cell soma; cytoplasm; dendritic spine; growth cone; lamellipodium; nuclear speck; nucleoplasm; nucleus; perinuclear region of cytoplasm; plasma membrane; postsynaptic membrane; presynaptic membrane; protein complex; synapse

Molecular Function: beta-amyloid binding; chromatin binding; histone binding; protein binding; protein complex binding; tau protein binding; transcription factor binding

Biological Process: apoptosis; axonogenesis; cell cycle arrest; double-strand break repair; negative regulation of cell growth; negative regulation of thymidylate synthase biosynthetic process; positive regulation of apoptosis; positive regulation of DNA repair; positive regulation of protein secretion; positive regulation of transcription from RNA polymerase II promoter; positive regulation of transcription, DNA-dependent; regulation of transcription, DNA-dependent; response to DNA damage stimulus; response to iron ion; signal transduction; transcription, DNA-dependent