ELECTRON MICROSCOPY

Sample

F-actin-myosin-tropomyosin complex

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument GATAN CRYOPLUNGE 3
Cryogen Name ETHANE
Sample Vitrification Details Sample (2 uL of F-actin-tropomyosin solution) was applied to a glow-discharged holey carbon grid, incubated for 20 s and manually blotted from the backside for less than a second with filter paper. Afterwards 1.5 uL of myosin solution (3 uM without nucleotide) were added directly on the grid, incubated for 10 s and then manually blotted for 5 s from the backside with filter paper.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 118000
Reported Resolution (Å) 3.9
Resolution Method FSC 0.143 CUT-OFF
Other Details THE TROPOMYOSIN MAP FILTERED TO 7.0 ANGSTROM WAS MERGED WITH THE FINAL F-ACTIN-MYOSIN MAP (3.9 ANGSTROM) TO OBTAIN A MAP OF THE ENTIRE F-ACTIN-MYOSIN-TROPOMYOSIN COMPLEX.
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space ?
Refinement Protocol BACKBONE TRACE
Refinement Target ?
Overall B Value 180
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type FEI FALCON II (4k x 4k)
Electron Dose (electrons/Å2) 16
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) ?
Maximum Defocus (nm) ?
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification 59000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details Cs corrected microscope
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION SPARX ?
IMAGE ACQUISITION EPU ?
CTF CORRECTION CTFFIND 4
CTF CORRECTION RELION 1.3
MODEL FITTING MODELLER ?
MODEL FITTING UCSF Chimera ?
MODEL FITTING iMODFIT ?
MODEL REFINEMENT Coot ?
MODEL REFINEMENT REFMAC ?
INITIAL EULER ASSIGNMENT RELION 1.3
FINAL EULER ASSIGNMENT RELION 1.3
CLASSIFICATION RELION 1.3
CLASSIFICATION SPARX ?
RECONSTRUCTION RELION 1.3
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?
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