7UJL
Bacteriophage Lambda Red-Beta N-terminal domain helical assembly in complex with dsDNA
ELECTRON MICROSCOPY
Sample |
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RedBeta177 oligomeric helical assembly bound to two complementary 27mer ssDNA oligonucleotides |
Sample Components |
Red-beta annealase N-terminal domain |
Template ssDNA |
Complementary ssDNA |
Specimen Preparation | |
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Sample Aggregation State | HELICAL ARRAY |
Vitrification Instrument | FEI VITROBOT MARK IV |
Cryogen Name | ETHANE |
Sample Vitrification Details | Sample loading volume ranged between 2 and 3 microlitres. Samples were blotted for 5 seconds prior to vitrification. |
3D Reconstruction | |
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Reconstruction Method | HELICAL |
Number of Particles | 26525 |
Reported Resolution (Å) | 3.3 |
Resolution Method | FSC 0.143 CUT-OFF |
Other Details | |
Refinement Type | |
Symmetry Type | HELICAL |
Axial Symmetry | C1 |
Axial Rise | 2.078 |
Angular Rotation | -12.947 |
Map-Model Fitting and Refinement | |||||
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Id | 1 | ||||
Refinement Space | REAL | ||||
Refinement Protocol | FLEXIBLE FIT | ||||
Refinement Target | Correlation coefficient | ||||
Overall B Value | |||||
Fitting Procedure | |||||
Details |
Data Acquisition | |||||||||
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Detector Type | GATAN K2 SUMMIT (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 50 |
Imaging Experiment | 1 |
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Date of Experiment | |
Temperature (Kelvin) | |
Microscope Model | FEI TITAN KRIOS |
Minimum Defocus (nm) | 500 |
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 | |
Calibrated Magnification | 59500 |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 300 |
Imaging Details |
EM Software | ||
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Task | Software Package | Version |
PARTICLE SELECTION | cryoSPARC | 3.0 |
IMAGE ACQUISITION | EPU | |
CTF CORRECTION | cryoSPARC | 3.0 |
MODEL FITTING | ISOLDE | |
MODEL REFINEMENT | PHENIX | |
INITIAL EULER ASSIGNMENT | cryoSPARC | 3.0 |
FINAL EULER ASSIGNMENT | cryoSPARC | 3.0 |
CLASSIFICATION | RELION | 3.1 |
RECONSTRUCTION | cryoSPARC | 3.0 |
Image Processing | ||||
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CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
PHASE FLIPPING AND AMPLITUDE CORRECTION | 922280 | 922280 particles were initially selected using cryoSPARC filament tracing |