ELECTRON MICROSCOPY

Sample

COMPLEX OF HUMAN HSP90BETA, HUMAN CDC37 AND HUMAN CDK4

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK III
Cryogen Name ETHANE
Sample Vitrification Details LIQUID ETHANE
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 114683
Reported Resolution (Å) 7.2
Resolution Method ?
Other Details SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-3340. (DEPOSITION ID: 14281).
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value 141
Fitting Procedure ?
Details Cdc37 crystal structure from PDB:1US7 was fit into EMD-3340 manually and then with UCSF Chimera "Fit In Map" tool. The model was truncated at residue 260, as there was no reliable density for the rest of the crystal structure. PDB:5FWK and the above fit crystal structure for residues 148-260 were loaded in Coot. The residues 133-147 were built in by hand into the Cdc37 Reconstruction and residues 245-260 (helix) were rotated as a rigid body. To relieve atomic clashes or bond length/angle distortions at the linker regions, the resulting model was subjected to "Cartesian space relax" protocol within EMD-3340 map using Rosetta. Final model was selected using the combined score of Rosetta all-atom physically-realistic score and electron density score.
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 44
Imaging Experiment
Date of Experiment 2014-11-25
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1400
Maximum Defocus (nm) 3800
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 22500
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL REFINEMENT Rosetta ?
MODEL REFINEMENT UCSF Chimera ?
RECONSTRUCTION RELION ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details