2AKH
Normal mode-based flexible fitted coordinates of a non-translocating SecYEG protein-conducting channel into the cryo-EM map of a SecYEG-nascent chain-70S ribosome complex from E. coli
ELECTRON MICROSCOPY
Sample |
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protein-conducting channel |
Sample Components |
protein translocase activity |
protein translocase activity |
protein translocase activity |
Specimen Preparation | |
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Sample Aggregation State | PARTICLE |
Vitrification Instrument | HOMEMADE PLUNGER |
Cryogen Name | ETHANE |
Sample Vitrification Details |
3D Reconstruction | |
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Reconstruction Method | SINGLE PARTICLE |
Number of Particles | 53325 |
Reported Resolution (Å) | 14.9 |
Resolution Method | FSC 0.5 CUT-OFF |
Other Details | The resolution is based on FSC at 0.5 cut-off |
Refinement Type | |
Symmetry Type | POINT |
Point Symmetry | C1 |
Map-Model Fitting and Refinement | |||||
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Id | 1 | ||||
Refinement Space | REAL | ||||
Refinement Protocol | FLEXIBLE FIT | ||||
Refinement Target | correlation coefficient, R-factor | ||||
Overall B Value | |||||
Fitting Procedure | |||||
Details | METHOD--normal mode-based flexible fitting REFINEMENT PROTOCOL--normal mode-based flexible fitting, real space refinement |
Data Acquisition | |||||||||
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Detector Type | KODAK SO-163 FILM | ||||||||
Electron Dose (electrons/Å**2) | 11 |
Imaging Experiment | 1 |
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Date of Experiment | 2004-03-09 |
Temperature (Kelvin) | 93 |
Microscope Model | FEI TECNAI F30 |
Minimum Defocus (nm) | 1500 |
Maximum Defocus (nm) | 4300 |
Minimum Tilt Angle (degrees) | |
Maximum Tilt Angle (degrees) | |
Nominal CS | 2.26 |
Imaging Mode | BRIGHT FIELD |
Specimen Holder Model | OTHER |
Nominal Magnification | 39000 |
Calibrated Magnification | 39000 |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 300 |
Imaging Details |
EM Software | ||
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Task | Software Package | Version |
MODEL FITTING | RSR2000 | |
RECONSTRUCTION | SPIDER |
Image Processing | ||||
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CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
defocus groups |