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Peptides. 1995;16(4):647-52.

Neutral endopeptidase can hydrolyze beta-amyloid(1-40) but shows no effect on beta-amyloid precursor protein metabolism.

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Département de Biochimie, Faculté de Médecine, Université de Montréal, PQ, Canada.


High performance liquid chromatographic analyses of incubations of beta-amyloid(1-40) with neutral endopeptidase revealed at least nine product peaks, indicating that neutral endopeptidase can cleave beta-amyloid at multiple sites. Mass spectroscopic analysis of hydrolyzed beta-amyloid identified at least five cleavage sites, between residues Glu3-Phe4, Gly9-Trp10, Phe19-Phe20, Ala30-Ile31, and Gly33-Leu34. In contrast, amyloid precursor protein metabolism in Neuro2A cells was unaffected by the expression of recombinant neutral endopeptidase in the same cells or by the addition of a secreted form of neutral endopeptidase to spent Neuro2A cell media.

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