TY  - JOUR
AU  - Barz, Bogdan
AU  - Liao, Qinghua
AU  - Strodel, Birgit
TI  - Pathways of amyloid-β aggregation depend on oligomer shape
JO  - Journal of the American Chemical Society
VL  - 140
IS  - 1
SN  - 0002-7863
CY  - Washington, DC
PB  - American Chemical Society
M1  - FZJ-2017-08605
SP  - 319–327
PY  - 2018
AB  - One of the the main research topics related to Alzheimer’s disease is the aggregation of the amyloid-β peptide, which was shown to follow different pathways for the two major alloforms of the peptide, Aβ40 and the more toxic Aβ42. Experimental studies emphasized that oligomers of specific sizes appear in the early aggregation process in different quantities and might be the key toxic agents for each of the two alloforms. We use transition networks derived from all-atom molecular dynamics simulations to show that the oligomers leading to the type of oligomer distributions observed in experiments originate from compact conformations. Extended oligomers, on the other hand, contribute more to the production of larger aggregates thus driving the aggregation pro cess. We further demonstrate that differences in the aggregation pathways of the two Aβ alloforms occur as early as during the dimer stage. The higher solvent-exposure of hydrophobic residues in Aβ42 oligomers contributes to the different aggregation pathways of both alloforms and also to the increased cytotoxicity of Aβ42.
LB  - PUB:(DE-HGF)16
C6  - pmid:29235346
UR  - <Go to ISI:>//WOS:000422813300060
DO  - DOI:10.1021/jacs.7b10343
UR  - https://juser.fz-juelich.de/record/841567
ER  -