Structural characterisation of chromatin remodelling intermediates supports linker DNA dependent product inhibition as a mechanism for nucleosome spacing.
ELECTRON MICROSCOPY
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 27.448 |
| f_angle_d | 1.229 |
| f_chiral_restr | 0.095 |
| f_bond_d | 0.01 |
| f_plane_restr | 0.01 |
| Sample |
|---|
| Nucleosome-Chd1 complex |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | Vitrification carried out in climate chamber with 100% humidity |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 128000 |
| Reported Resolution (Å) | 4.8 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (3LZ0, 6FTX, 7TN2) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | cross-correlation | ||||
| Overall B Value | 180 | ||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K3 BIOQUANTUM (6k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 46 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | TFS KRIOS |
| Minimum Defocus (nm) | 1800 |
| Maximum Defocus (nm) | 3200 |
| 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 | 81000 |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | cryoSPARC | 4.17 |
| CTF CORRECTION | cryoSPARC | 4.5.3 |
| MODEL FITTING | PHENIX | 1.21_5207 |
| MODEL FITTING | ISOLDE | 1.10 |
| MODEL FITTING | Coot | 0.98.53 |
| INITIAL EULER ASSIGNMENT | cryoSPARC | 4.5.3 |
| FINAL EULER ASSIGNMENT | cryoSPARC | 4.5.3 |
| CLASSIFICATION | cryoSPARC | 4.5.3 |
| RECONSTRUCTION | cryoSPARC | 4.5.3 |
| MODEL REFINEMENT | PHENIX | 1.21_5207 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING ONLY | 2700000 | |||
