[Lys22]-beta-Amyloid (1-40), Italian Mutation, Human

This is amino acids 1 to 40 fragment of the beta-amyloid peptide with lysine substituted for glutamic acid at position 22, found in Italian families. The Italian mutation of beta-amyloid 1-40 (E22K) aggregates more rapidly and with more potent neurotoxicity than wild-type beta-amyloid 1-40. The formation of a salt bridge between Lys-22 and Asp-23 in the minor conformer might be a reason why E22K-beta-amyloid 40 is more pathogenic than wild-type beta-amyloid 40.