APPBP1 Antibody – Polyclonal

The protein encoded by this gene binds to the beta-amyloid precursor protein. Beta-amyloid precursor protein is a cell surface protein with signal-transducing properties, and it is thought to play a role in the pathogenesis of Alzheimer's disease. In addition, the encoded protein can form a heterodimer with UBE1C and bind and activate NEDD8, a ubiquitin-like protein. This protein is required for cell cycle progression through the S/M checkpoint. Three transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

APPBP1: Regulatory subunit of the dimeric UBA3-NAE1 E1 enzyme. E1 activates NEDD8 by first adenylating its C-terminal glycine residue with ATP, thereafter linking this residue to the side chain of the catalytic cysteine, yielding a NEDD8-UBA3 thioester and free AMP. E1 finally transfers NEDD8 to the catalytic cysteine of UBE2M. Necessary for cell cycle progression through the S-M checkpoint. Overexpression of NAE1 causes apoptosis through deregulation of NEDD8 conjugation. Belongs to the ubiquitin-activating E1 family. ULA1 subfamily. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Ubiquitin conjugating system

Chromosomal Location of Human Ortholog: 16q22

Cellular Component: cytoplasm; cytosol; nucleus; plasma membrane

Molecular Function: NEDD8 activating enzyme activity; protein binding; protein heterodimerization activity; ubiquitin protein ligase binding

Biological Process: mitotic cell cycle DNA replication checkpoint; neuron apoptosis; protein neddylation; regulation of apoptosis; regulation of neuron apoptosis; signal transduction