JOURNAL ARTICLE

Aggregation of beta-amyloid fragments

Jan H Meinke, Ulrich H E Hansmann
Journal of Chemical Physics 2007 January 7, 126 (1): 014706
17212510
The authors study the folding and aggregation of six chains of the beta-amyloid fragment 16-22 using Monte Carlo simulations. While the isolated fragment prefers a helical form at room temperature, in the system of six interacting fragments one observes both parallel and antiparallel beta sheets below a crossover temperature T(x) approximately equal to 420 K. The antiparallel sheets have lower energy and are therefore more stable. Above the nucleation temperature the aggregate quickly dissolves into widely separated, weakly interacting chains.

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