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Cryo-EM structure of the glucose-specific PTS transporter IICB from E. coli in an intermediate state
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 8QSR
Sample homo-dimeric complex
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 563331 Reported Resolution (Å) 2.53 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C2
Map-Model Fitting and Refinement Id 1 (8QSR) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value Fitting Procedure Details initial rigid body fitting in ChimeraX, flexible fitting in Isolde and refinement in Coot and Phenix
Data Acquisition Detector Type FEI FALCON IV (4k x 4k) Electron Dose (electrons/Å**2) 35.04
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS KRIOS Minimum Defocus (nm) 800 Maximum Defocus (nm) 2200 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
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC 4.1.0 IMAGE ACQUISITION EPU CTF CORRECTION cryoSPARC 4.1.0 MODEL FITTING UCSF ChimeraX INITIAL EULER ASSIGNMENT cryoSPARC 4.1.0 FINAL EULER ASSIGNMENT cryoSPARC 4.1.0 RECONSTRUCTION cryoSPARC 4.1.0 MODEL REFINEMENT PHENIX
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 6831987