ELECTRON MICROSCOPY

Sample

Ecoli DnaB helicase and Phage Lambda loader P with ADP-Mg in a 6:5 stoichiometry ratio.

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Protein BP (1.5 uM) and DNA (1.875 uM) was mixed in a 1.25 molar excess. 3uL of the sample was added to a plasma-cleaned grid at 4 degrees celsius, 100 percent humidity, blot force 4, blot time 4s, wait time 30s, total blots 1, and plunge-frozen into liquid nitrogen-cooled ethane.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 1500880
Reported Resolution (Å) 2.66
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol OTHER
Refinement Target ?
Overall B Value 160.67
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K3 (6k x 4k)
Electron Dose (electrons/Å2) 51.01
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS KRIOS
Minimum Defocus (nm) 1000
Maximum Defocus (nm) 2500
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 81000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL REFINEMENT PHENIX 1.21.2_5419
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?