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a5b3 GABAAR bound to GABA and Mb25 in a desensitized state in saposin nanodiscs after long GABA treatment
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details in silico model AlphaFold
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 14.1447 f_angle_d 0.602 f_chiral_restr 0.0424 f_plane_restr 0.006 f_bond_d 0.0027
Sample heteromeric assembly of 2 a5 and 3 b3 bound to 1 Mb25
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 161171 Reported Resolution (Å) 3.1 Resolution Method FSC 0.143 CUT-OFF Other Details Final refinement performed with Blush regularization Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 Refinement Space Refinement Protocol RIGID BODY FIT Refinement Target Overall B Value Fitting Procedure Details Initial rigid body fit in ChimeraX followed by refinement with Isolde then Phenix
Data Acquisition Detector Type GATAN K3 BIOCONTINUUM (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) 1800 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS Imaging Mode BRIGHT FIELD Specimen Holder Model Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version MODEL REFINEMENT PHENIX 1.21.1_5286
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION