REL PDBe PDBe PDBe 2013-07-29 2013-08-07 2013-09-18 2013-09-25 Nicoll AJ Panico S Freir DB Wright D Terry C Risse E Herron CE O'Malley T Wadsworth JD Farrow MA Walsh DM Saibil HR Collinge J nanotube, neurodegeneration, prion-dependent synaptotoxicity Nicoll AJ Panico S Freir DB Wright D Terry C Risse E Herron CE O'Malley T Wadsworth JD Farrow MA Walsh DM Saibil HR Collinge J NAT.COMMUN. 4 2416 2416 2013 24022506 doi:10.1038/ncomms3416 Amyloid-Beta (1-42) nanotube Amyloid-Beta (1-42) nanotube

Protofibrils were prepared from synthetic Amyloid-Beta (1-42) peptide. Briefly hexafluoro-2-propanol-trated Amyloid-beta (1-42) was dissolved in DMSO, diluted into phenol red-free Hams-F12 medium, centrifuged and incubated at 22 C for 16 hours. Size of protofibrils ranged from 0.1 to 1 megadaltons

protofibrils 1 0.5 size-exclusion chromatography with static light scattering Amyloid-beta (1-42) Homo sapiens human false singleParticle filament 0.1

phenol red-free Ham's F12 cell medium (2% DMSO)

NEGATIVE

Grids with adsorbed protein were stained with 2% w/v uranyl acetate for 1 minute

Negatively glow discharged 300 mesh copper grid with continuous carbon layer

NONE OTHER FEI TECNAI 12 FLOOD BEAM BRIGHT FIELD TUNGSTEN HAIRPIN 120 2.2 0.7 1.0 42000.0 42986.0 SIDE ENTRY, EUCENTRIC corrected for at specimen level 2011-01-10 KODAK SO-163 FILM ZEISS SCAI 7 50 20 8.

Three-dimensional reconstructions were calculated from extracted, aligned and classified segments and applying helical symmetry, using the pitch independently determined from tomography and single pixel increments in z to generate continuous helices.

phase flipping, whole micrograph

3.26 15 OTHER Spider

Maps were calculated from individual classes. Final volume is the average of six maps (maps averaged in CHIMERA). Helical pitch repeat was obtained from tomography data. Since the subunit repeat could not be determined, continuous helices were generated.

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