7K5C
Structure of T7 DNA ejectosome periplasmic tunnel
ELECTRON MICROSCOPY
Sample |
---|
Multisubunit T7 DNA ejectosome periplasmic tunnel with 6x copies of Gp15 and 6x copies of Gp16 |
Specimen Preparation | |
---|---|
Sample Aggregation State | PARTICLE |
Vitrification Instrument | FEI VITROBOT MARK IV |
Cryogen Name | ETHANE |
Sample Vitrification Details | blot for 6 seconds before plunging |
3D Reconstruction | |
---|---|
Reconstruction Method | SINGLE PARTICLE |
Number of Particles | 208024 |
Reported Resolution (Å) | 2.7 |
Resolution Method | FSC 0.143 CUT-OFF |
Other Details | |
Refinement Type | |
Symmetry Type | POINT |
Point Symmetry | C1 |
Map-Model Fitting and Refinement | |||||
---|---|---|---|---|---|
Id | 1 | ||||
Refinement Space | REAL | ||||
Refinement Protocol | AB INITIO MODEL | ||||
Refinement Target | 0.92 | ||||
Overall B Value | 45.1 | ||||
Fitting Procedure | |||||
Details |
Data Acquisition | |||||||||
---|---|---|---|---|---|---|---|---|---|
Detector Type | GATAN K3 (6k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 50 |
Imaging Experiment | 1 |
---|---|
Date of Experiment | |
Temperature (Kelvin) | |
Microscope Model | FEI TITAN KRIOS |
Minimum Defocus (nm) | 1000 |
Maximum Defocus (nm) | 2500 |
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 | 81000 |
Calibrated Magnification | |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 300 |
Imaging Details |
EM Software | ||
---|---|---|
Task | Software Package | Version |
PARTICLE SELECTION | RELION | 3.0-b |
IMAGE ACQUISITION | Latitude | S |
CTF CORRECTION | RELION | 3.0-b |
MODEL FITTING | UCSF Chimera | 1.14 |
INITIAL EULER ASSIGNMENT | RELION | 3.0-b |
FINAL EULER ASSIGNMENT | RELION | 3.0-b |
CLASSIFICATION | RELION | 3.0-b |
RECONSTRUCTION | RELION | 3.0-b |
MODEL REFINEMENT | PHENIX | 1.17 |
Image Processing | ||||
---|---|---|---|---|
CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
PHASE FLIPPING AND AMPLITUDE CORRECTION | 4700000 | Manually picked 2000 particles using Relion GUI, followed by 2D-Classification to select templates, then Relion auto-picking was used. |