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Atomic-resolution structure of a doublet cross-beta amyloid fibril
SOLID-STATE NMR - ELECTRON MICROSCOPY
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 1D DQ-DRAWS 15 mg/mL [U-100% 13C; U-100% 15N] TTR(105-115) 10% acetonitrile/water solution 2 ambient 2 REDOR 15 mg/mL [U-100% 13C; U-100% 15N] TTR(105-115) 10% acetonitrile/water solution 2 ambient 3 ZF-TEDOR 15 mg/mL [U-100% 13C; U-100% 15N] TTR(105-115) 10% acetonitrile/water solution 2 ambient 4 2D PDSD 15 mg/mL [U-100% 13C; U-100% 15N] TTR(105-115) 10% acetonitrile/water solution 2 ambient
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Bruker 900 2 750 3 500
NMR Refinement Method Details Software simulated annealing CNSSOLVE
NMR Ensemble Information Conformer Selection Criteria structures with the least restraint violations Conformers Calculated Total Number 100 Conformers Submitted Total Number 1 Representative Model 1 (lowest energy)
Computation: NMR Software # Classification Version Software Name Author 1 structure solution CNSSOLVE Brunger, Adams, Clore, Gros, Nilges and Read 2 refinement CNSSOLVE Brunger, Adams, Clore, Gros, Nilges and Read
Sample Doublet cross-beta amyloid fibril polymorph
Specimen Preparation Sample Aggregation State FILAMENT Vitrification Instrument HOMEMADE PLUNGER Cryogen Name ETHANE Sample Vitrification Details Fibrils were applied to holey carbon films that were immediately plunge-frozen at liquid nitrogen temperature.
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 82 Reported Resolution (Å) 12.7 Resolution Method FSC 0.5 CUT-OFF Other Details The particles were selected using an automatic selection program. Refinement Type Symmetry Type HELICAL
Map-Model Fitting and Refinement Id 1 Refinement Space Refinement Protocol Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type KODAK SO-163 FILM Electron Dose (electrons/Å**2)
Imaging Experiment 1 Date of Experiment 2006-03-03 Temperature (Kelvin) 99 Microscope Model FEI TECNAI F20 Minimum Defocus (nm) 900 Maximum Defocus (nm) 3000 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS Imaging Mode BRIGHT FIELD Specimen Holder Model GATAN LIQUID NITROGEN Nominal Magnification 40000 Calibrated Magnification 40000 Source FIELD EMISSION GUN Acceleration Voltage (kV) 200 Imaging Details
EM Software Task Software Package Version RECONSTRUCTION BKRP RECONSTRUCTION IMAGIC RECONSTRUCTION SPIDER
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details CTFFIND3