Ecoli DnaB helicase and Phage Lambda loader P with ADP-Mg in a 6:6 stoichiometry ratio.
ELECTRON MICROSCOPY
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 9.3107 |
| f_angle_d | 0.5785 |
| f_chiral_restr | 0.0406 |
| f_plane_restr | 0.0045 |
| f_bond_d | 0.0025 |
| Sample |
|---|
| Replication initiation intermediate with Escherichia coli DnaB helicase and Phage Lambda loader P in a 6:6 stoichiometry ratio |
| Sample Components |
| Ecoli DnaB helicase |
| Phage Lambda loader P |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | Protein BP (1.5 uM), ssDNA (1.875 uM), and LO-156-299-NHis (2.25 uM) was mixed at 1.25 and 1.5 molar excess, respectively. 3uL of the sample was adde ... |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 572557 |
| Reported Resolution (Å) | 3.85 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (1B79, 8V9S) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | OTHER | ||||
| Refinement Target | |||||
| Overall B Value | 153.98 | ||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K3 (6k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 51.19 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | TFS KRIOS |
| Minimum Defocus (nm) | 600 |
| Maximum Defocus (nm) | 2700 |
| 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 | cryoSPARC | 4 |
| IMAGE ACQUISITION | Leginon | |
| CTF CORRECTION | cryoSPARC | 4 |
| MODEL FITTING | PHENIX | 1.21.2_5419 |
| RECONSTRUCTION | cryoSPARC | 4 |
| MODEL REFINEMENT | PHENIX | 1.21.2_5419 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | 2315940 | Particle picking was performed using Topaz in CryoSPARC. | ||
