8QA2
Cryo-EM structure of Cx26 solubilised in LMNG: classification on subunit A; Nconst-mon conformation
ELECTRON MICROSCOPY
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 7QEQ |
Refinement
RMS Deviations | |
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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 |
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Connexin 26, 90mmHg PCO2, pH7.4, solubilised in LMNG. |
Specimen Preparation | |
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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 | |
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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 | |||||
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Id | 1 (7QEQ) | ||||
Refinement Space | REAL | ||||
Refinement Protocol | |||||
Refinement Target | |||||
Overall B Value | |||||
Fitting Procedure | |||||
Details |
Data Acquisition | |||||||||
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Detector Type | GATAN K3 (6k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 43 |
Imaging Experiment | 1 |
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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 | ||||
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CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
PHASE FLIPPING AND AMPLITUDE CORRECTION | 7652471 |