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Cryo-EM structure of pSTAT1 bound to importin alpha 5 (4:2 assembly)
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details integrative model Other
Sample This is a complex of domain-swapped dimer of pSTAT1:importin aplha 5 heterodimers.
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 146431 Reported Resolution (Å) 3.6 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C2
Map-Model Fitting and Refinement Id 1 Refinement Space REAL Refinement Protocol RIGID BODY FIT Refinement Target Cross correlation Overall B Value Fitting Procedure Details Initial fitting in Chimera, followed by rebuilding in Coot and real-space refinement in Phenix.
Data Acquisition Detector Type GATAN K3 BIOQUANTUM (6k x 4k) Electron Dose (electrons/Å**2) 50
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS KRIOS Minimum Defocus (nm) 800 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 105000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION Topaz 0.3.0 CTF CORRECTION cryoSPARC v5.0.7 MODEL FITTING UCSF ChimeraX 1.11.1 MODEL REFINEMENT PHENIX 2.0_5936 INITIAL EULER ASSIGNMENT cryoSPARC v5.0.7 FINAL EULER ASSIGNMENT cryoSPARC v5.0.7 CLASSIFICATION cryoSPARC v5.0.7 RECONSTRUCTION cryoSPARC v4.2.1
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 6483490