☰ Navigation Tabs
nicotinic acetylcholine receptor in intact synaptic membrane
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 7SMM
Sample Muscle-type nicotinic acetylcholine receptor in intact synaptic membrane
Specimen Preparation Sample Aggregation State HELICAL ARRAY Vitrification Instrument HOMEMADE PLUNGER Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 107524 Reported Resolution (Å) 4.7 Resolution Method FSC 0.143 CUT-OFF Other Details The volumes for FSC determination were cut out from helical reconstructions of each class average Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 (7SMM, 7SMM, 7SMM, 7SMM, 7SMM) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value 350 Fitting Procedure Details Refinement parameters were chosen to minimise changes to the original secondary structure
Data Acquisition Detector Type FEI FALCON III (4k x 4k) Electron Dose (electrons/Å**2) 40
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1200 Maximum Defocus (nm) 2800 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 59000 Calibrated Magnification 104478 Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details All images taken manually: by searching at low magnification for long straight and narrow tubes, then recording in integrating mode
EM Software Task Software Package Version PARTICLE SELECTION RELION 2.1 and 3.1 IMAGE ACQUISITION DigitalMicrograph CTF CORRECTION Gctf MODEL FITTING DireX CLASSIFICATION RELION 2.1 RECONSTRUCTION RELION 2.1 MODEL REFINEMENT DireX
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION Correction performed by standard procedure in RELION 160652 160652 tube segments from 4045 selected micrographs were reduced to
107524 tube segments after 2D classification