Beta-Amyloid (3-42)
- Cat.Number : AS-63715-01
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This peptide is beta-amyloid (1-42) N-terminally truncated. It is the non-pyroglatamate form of beta-Amyloid (3-42). N-terminally truncated pyroglutamate-modified beta-Amyloid forms such as Aß(3-42) and Aß (11- 42) have been described as major compounds in the senile plaques. Pyro-Glu modified beta-Amyloid forms are more resistant to degradation, show higher toxicity and have increased aggregation propensity compared to non-modified beta-Amyloid.
Pyroglutamyl (pGlu) peptides may spontaneously form when either Glutamine (Q) or Glutamic acid (E) is located at the sequence N-terminus. The conversion of Q or E to pGlu is a natural occurrence and in general it is believed that the hydrophobic γ-lactam ring of pGlu may play a role in peptide stability against gastrointestinal proteases. Pyroglutamyl peptides are therefore considered a normal subset of such peptides and are included as part of the peptide purity during HPLC analysis.
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Citations
Pyroglutamate Abeta pathology in APP/PS1KI mice, sporadic and familial Alzheimer’s disease cases
J Neural Transm . 2010 Jan 01 ; 117(1) 85 | DOI : 10.1007/s00702-009-0314-x
- O. Wirths