This peptide triggers the formation of insoluble Aß peptide deposits, inhibits secretion of amyloid protein precursor (APP) and increases cell-associated APP. The fibrils in the plaques formed in the brains of patients with Alzheimer’s disease contain significant amounts of truncated Aß proteins such as Aß(3-40) and Aß (11- 40). These two fragments contain an N-terminal pyroglutamic acid. The g-carboxy group of glutamic acid forms a cyclic bond with the free N-terminal amino group to form pyroglutamate.
Mok, SS. et al. J. Neurosci. Res. 61, 449 (2000); Russo, C. et al. Nature. 405, 531 (2000).
Sequence (One-Letter Code)
Sequence (Three-Letter Code)
Pyr - Phe - Arg - His - Asp - Ser - Gly - Tyr - Glu - Val - His - His - Gln - Lys - Leu - Val - Phe - Phe - Ala - Glu - Val - Gly - Asp - Ser - Asn - Lys - Gly - Ala - Ile - Ile - Gly - Leu - Met - Val - Gly - Gly - Val - Val - OH