4AQ5
Gating movement in acetylcholine receptor analysed by time-resolved electron cryo-microscopy (closed class)
ELECTRON MICROSCOPY
Sample |
---|
NICOTINIC ACETYLCHOLINE RECEPTOR IN NATIVE POSTSYNAPTIC MEMBRANE FROM TORPEDO MARMORATA |
Specimen Preparation | |
---|---|
Sample Aggregation State | HELICAL ARRAY |
Vitrification Instrument | HOMEMADE PLUNGER |
Cryogen Name | ETHANE |
Sample Vitrification Details | VITRIFICATION 1 -- CRYOGEN- ETHANE, HUMIDITY- 85 TEMPERATURE- 120 INSTRUMENT- HOMEMADE PLUNGER METHOD- BLOT UNTIL APPLIED DROPLET LOSES CONTACT WITH F ... |
3D Reconstruction | |
---|---|
Reconstruction Method | HELICAL |
Number of Particles | |
Reported Resolution (Å) | 6.2 |
Resolution Method | |
Other Details | FOURIER-BESSEL SYNTHESIS AFTER APPLYING DISTORTION CORRECTIONS TO THE IMAGES. SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2071. |
Refinement Type | |
Symmetry Type | HELICAL |
Map-Model Fitting and Refinement | |||||
---|---|---|---|---|---|
Id | 1 (2BG9) | ||||
Refinement Space | REAL | ||||
Refinement Protocol | FLEXIBLE FIT | ||||
Refinement Target | |||||
Overall B Value | |||||
Fitting Procedure | |||||
Details | METHOD--MAXIMISATION OF CORRELATION BETWEEN EXPERIMENTAL DENSITIES AND ATOMIC MODEL, USING A DEFORMABLE ELASTIC NETWORK ALGORITHM (DIREX) REFINEMENT ... |
Data Acquisition | |||||||||
---|---|---|---|---|---|---|---|---|---|
Detector Type | KODAK SO-163 FILM | ||||||||
Electron Dose (electrons/Å**2) | 25 |
Imaging Experiment | 1 |
---|---|
Date of Experiment | 2005-11-01 |
Temperature (Kelvin) | 4 |
Microscope Model | JEOL 3000SFF |
Minimum Defocus (nm) | 900 |
Maximum Defocus (nm) | 2000 |
Minimum Tilt Angle (degrees) | |
Maximum Tilt Angle (degrees) | |
Nominal CS | 1.6 |
Imaging Mode | BRIGHT FIELD |
Specimen Holder Model | |
Nominal Magnification | 40000 |
Calibrated Magnification | 38500 |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 300 |
Imaging Details | STANDARD LOW DOSE IMAGING OF SPECIMENS OVER HOLES IN THE CARBON SUPPORT FILM |
EM Software | ||
---|---|---|
Task | Software Package | Version |
MODEL FITTING | DireX | |
RECONSTRUCTION | Custom | |
RECONSTRUCTION | MRC IMAGE PROCESSING PACKAGE |
Image Processing | ||||
---|---|---|---|---|
CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
EACH TUBE IMAGE |