ELECTRON MICROSCOPY

Sample

GluA4 in complex with TARP-2, Resting II state, structure of TMD/LBD domain

Specimen Preperation
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 35082
Reported Resolution (Å) 3.8
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 I performed fitting using Chimera for the TMD domain (previously modeled and individually deposited in the PDB), along with the following LBDs: LBD monomers from GluA4G2 Resting I (PDB ID: 9QDN) were fitted into chains A and D, while PDB entry 4U2R (GluA2 LBD, apo state) and PDB entry 4O3B (GluA2, aspartate-bound) were fitted into chains B and C, respectively. B-factors were reset, GluA4 residues were substituted, water molecules were removed, and NBQX was introduced. Subsequently, rigid-body refinement was performed using Phenix.
Data Acquisition
Detector Type GATAN K3 BIOCONTINUUM (6k x 4k)
Electron Dose (electrons/Å2) 50
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS KRIOS
Minimum Defocus (nm) 800
Maximum Defocus (nm) 2000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification ?
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION RELION 5.0
MODEL REFINEMENT PHENIX 1.19.2_4158:
RECONSTRUCTION cryoSPARC 4.3.1
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?