Abstract |
A clear understanding of the pathological mechanism of amyloid beta peptide (Abeta) 1-42, a currently unexplained process, would be of great significance for the discovery of novel drug targets for Alzheimer's disease (AD) therapy. To date, though, the elucidation of these Abeta1-42 dynamic events has been a difficult issue because of uncontrolled polymerization, which also poses a significant obstacle in establishing experimental systems with which to clarify the pathological function of Abeta1-42. We have recently developed chemical biology-oriented pH- or phototriggered "click peptide" isoform precursors of Abeta1-42, based on the "O-acyl isopeptide method", in which a native amide bond at a hydroxyamino acid residue, such as Ser, is isomerized to an ester bond, the target peptide subsequently being generated by an O-N intramolecular acyl migration reaction. These click peptide precursors did not exhibit any self-assembling character under physiological conditions, thanks to the presence of the one single ester bond, and were able to undergo migration to give the target Abeta1-42 in a quick and easy, one-way (so-called "click") conversion reaction. The use of click peptides could be a useful strategy to investigate the biological functions of Abeta1-42 in AD through inducible activation of Abeta1-42 self-assembly.
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Authors | Youhei Sohma, Yoshiaki Kiso |
Journal | Chembiochem : a European journal of chemical biology
(Chembiochem)
Vol. 7
Issue 10
Pg. 1549-57
(Oct 2006)
ISSN: 1439-4227 [Print] Germany |
PMID | 16915597
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Review)
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Chemical References |
- Amides
- Amyloid beta-Peptides
- Esters
- Peptide Fragments
- Protein Isoforms
- amyloid beta-protein (1-42)
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Topics |
- Alzheimer Disease
(metabolism, pathology)
- Amides
(chemistry)
- Amino Acid Sequence
- Amyloid beta-Peptides
(chemical synthesis, chemistry, genetics, metabolism)
- Esters
(chemistry)
- Humans
- Hydrogen-Ion Concentration
- Molecular Sequence Data
- Molecular Structure
- Peptide Fragments
(chemical synthesis, chemistry, genetics, metabolism)
- Protein Isoforms
(chemical synthesis, chemistry, genetics, metabolism)
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