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ELECTRON MICROSCOPY

Sample

NONO/SFPQ filament

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details 5 sec blotting time, +20 blot force
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 2974535
Reported Resolution (Å) 3.9
Resolution Method FSC 0.143 CUT-OFF
Other Details This is a composite map produced with Phenix "combine focused maps" (1.20.1) with EMD-51413 (overall consensus map), EMD-51417 and EMD-51418 (focused maps of single strands), EMD-51438 and EMD-51439 (focused maps of central units from single strands)
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value 150
Fitting Procedure ?
Details initially the crystal strucutre model of the heterodimer (PDB 6WMZ) was used for rigid fitting for the focused maps and further refined. The complete dimers of the focused models (PDB 9GLC and 9GLD) were used as templates for 4 repeats of the filament in the composite map (also containing the RRM1 domains by rigid fitting) to represent the biological assembly.
Data Acquisition
Detector Type FEI FALCON IV (4k x 4k)
Electron Dose (electrons/Å2) 70
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS KRIOS
Minimum Defocus (nm) 500
Maximum Defocus (nm) 1400
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.7
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 130000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL REFINEMENT PHENIX 1.20.1_4487:
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?
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