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Cryo-EM structure of Cx26 solubilised in LMNG: classification on subunit A; Nconst-mon conformation
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 7QEQ
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 5.9854 f_angle_d 0.4393 f_chiral_restr 0.0359 f_plane_restr 0.0024 f_bond_d 0.0017
Sample Connexin 26, 90mmHg PCO2, pH7.4, solubilised in LMNG.
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK I Cryogen Name ETHANE-PROPANE Sample Vitrification Details Blot 3 seconds, force 10, 1 blot, skip transfer. 3ul sample, in 15% CO2/85%N2 atmosphere
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 240137 Reported Resolution (Å) 2.3 Resolution Method FSC 0.143 CUT-OFF Other Details Particles were symmetry expanded before classification Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 (7QEQ) Refinement Space REAL Refinement Protocol Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 (6k x 4k) Electron Dose (electrons/Å**2) 43
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 800 Maximum Defocus (nm) 2300 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 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 RELION 4 CTF CORRECTION CTFFIND 4 MODEL FITTING Coot 0.9.8.4 MODEL REFINEMENT PHENIX 1.20.1 CLASSIFICATION RELION 4 RECONSTRUCTION RELION 4
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 7652471