@article{oai:kanazawa-u.repo.nii.ac.jp:00010357, author = {Milhiet, Pierre-Emmanuel and Yamamoto, Daisuke and Berthoumieu, Olivia and Dosset, Patrice and Grimellec, Christian Le and Verdier, Jean-Michel and Marchal, Stéphane and Ando, Toshio}, issue = {10}, journal = {PLoS ONE}, month = {Jan}, note = {Formation of fibrillar structures of proteins that deposit into aggregates has been suggested to play a key role in various neurodegenerative diseases. However mechanisms and dynamics of fibrillization remains to be elucidated. We have previously established that lithostathine, a protein overexpressed in the pre-clinical stages of Alzheimer's disease and present in the pathognomonic lesions associated with this disease, form fibrillar aggregates after its N-terminal truncation. In this paper we visualized, using high-speed atomic force microscopy (HS-AFM), growth and assembly of lithostathine protofibrils under physiological conditions with a time resolution of one image/s. Real-time imaging highlighted a very high velocity of elongation. Formation of fibrils via protofibril lateral association and stacking was also monitored revealing a zipper-like mechanism of association. We also demonstrate that, like other amyloid ß peptides, two lithostathine protofibrils can associate to form helical fibrils. Another striking finding is the propensity of the end of a growing protofibril or fibril to associate with the edge of a second fibril, forming false branching point. Taken together this study provides new clues about fibrillization mechanism of amyloid proteins. © 2010 Milhiet et al., 金沢大学理工研究域数物科学系}, title = {Deciphering the structure, growth and assembly of amyloid-like fibrils using high-speed atomic force microscopy}, volume = {5}, year = {2010} }