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Human metabotropic GABA(B) receptor bound to agonist SKF97541 and positive allosteric modulator GS39783
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 4MS3 experimental model PDB 4OR2
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 17.09 f_angle_d 0.713 f_chiral_restr 0.0506 f_plane_restr 0.0058 f_bond_d 0.0036
Sample GABA(B) receptor bound to agonist and PAM
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument LEICA EM GP Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 89001 Reported Resolution (Å) 3.63 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 (4MS3, 4OR2) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 (6k x 4k) Electron Dose (electrons/Å**2) 1.2
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) -1500 Maximum Defocus (nm) -3000 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 29000 Calibrated Magnification 29000 Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC 2.12.14 IMAGE ACQUISITION SerialEM 3.6 CTF CORRECTION cryoSPARC 2.12.14 MODEL FITTING PHENIX 1.17.1-3660 MODEL REFINEMENT PHENIX 1.17.1-3660 INITIAL EULER ASSIGNMENT cryoSPARC 2.12.14 FINAL EULER ASSIGNMENT cryoSPARC 2.12.14 CLASSIFICATION cryoSPARC 2.12.14 RECONSTRUCTION cryoSPARC 2.12.14
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 4173286