Amyloid-beta precursor protein
Mammalian protein found in humans / From Wikipedia, the free encyclopedia
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Amyloid-beta precursor protein (APP) is an integral membrane protein expressed in many tissues and concentrated in the synapses of neurons. It functions as a cell surface receptor[5] and has been implicated as a regulator of synapse formation,[6] neural plasticity,[7] antimicrobial activity,[8] and iron export.[9] It is coded for by the gene APP and regulated by substrate presentation.[10] APP is best known as the precursor molecule whose proteolysis generates amyloid beta (Aβ), a polypeptide containing 37 to 49 amino acid residues, whose amyloid fibrillar form is the primary component of amyloid plaques found in the brains of Alzheimer's disease patients.