ELECTRON MICROSCOPY


Sample

DARPin-aldolase platform in complex with GFP

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details Grids were frozen on a manual plunger at the Scripps Research Institute Core Microscopy Facility in a 4 degrees C cold room humidified to >95%.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 236339
Reported Resolution (Å) 3
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space ?
Refinement Protocol RIGID BODY FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details PDB models 5vy5 and 5ma6 were used as starting points. These models were mutated to match the sequence of the DARPin-aldolase platform in complex with GFP that were used. The PDB models were docked into the cryoEM density using Chimera fit into map function. No model refinement was used.
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 2.3
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 10000
Maximum Defocus (nm) 30000
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 165000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION SerialEM ?
IMAGE ACQUISITION EPU ?
CTF CORRECTION CTFFIND 4.1.10
CTF CORRECTION RELION 3.0 beta 2
MODEL FITTING UCSF Chimera 1.12
INITIAL EULER ASSIGNMENT RELION 3.0 beta 2
FINAL EULER ASSIGNMENT RELION 3.0 beta 2
RECONSTRUCTION RELION 3.0 beta 2
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION First whole micrograph correction with CtfFind4. Then per particle CTF Refinement in Relion.