A partially folded structure of amyloid-beta(1-40) in an aqueous environment.

A partially folded structure of amyloid-beta(1-40) in an aqueous environment.
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DOI:
10.1016/j.bbrc.2011.06.133
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发表时间:
2011-07-29
影响因子:
3.1
通讯作者:
Ramamoorthy, Ayyalusamy
Ramamoorthy, Ayyalusamy
中科院分区:
生物学4区
文献类型:
--
作者:
Vivekanandan, Subramanian;Brender, Jeffrey R.;Lee, Shirley Y.;Ramamoorthy, Ayyalusamy

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Aggregation of the Aβ1-40 peptide is linked to the development of extracellular plaques characteristic of Alzheimer’s disease. While previous studies commonly show the Aβ1-40 is largely unstructured in solution, we show that Aβ1-40 can adopt a compact, partially folded structure. In this structure, the central hydrophobic region of the peptide forms a 310 helix from H13 to D23 and the N- and C-termini collapse against the helix due to the clustering of hydrophobic residues. Helical intermediates have been predicted to be crucial on-pathway intermediates in amyloid fibrillogenesis, and the structure presented here presents a new target for investigation of early events in Aβ1-40 fibrillogenesis.
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