Structure of the DNase I- and phalloidin-bound pointed end of F-actin (conformer 1)
ELECTRON MICROSCOPY
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 6.771 |
| f_angle_d | 0.564 |
| f_chiral_restr | 0.044 |
| f_plane_restr | 0.003 |
| f_bond_d | 0.002 |
| Sample |
|---|
| F-actin pointed end bound by DNase I and phalloidin. |
| Sample Components |
| Actin filament pointed end |
| Phalloidin |
| Two DNase I molecules, each bound to the ultimate and penultimate actin subunits of the F-actin pointed end. |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE-PROPANE |
| Sample Vitrification Details | 3 seconds, force 0. |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 161657 |
| Reported Resolution (Å) | 3.84 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (6T20, 2A42) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | Real Space Refinement in Phenix. | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K3 BIOQUANTUM (6k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 64.6 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | FEI TITAN KRIOS |
| Minimum Defocus (nm) | 1200 |
| Maximum Defocus (nm) | 2500 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | 0.01 |
| 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 | 300 kV Titan Krios G2 microscope (Thermo Fisher Scientific) with an in-column Cs-corrector. |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | crYOLO | 1.8 |
| IMAGE ACQUISITION | EPU | |
| CTF CORRECTION | CTFFIND | 4.13 |
| MODEL FITTING | UCSF ChimeraX | 1.6.1 |
| MODEL FITTING | Coot | 0.9.8.1 |
| INITIAL EULER ASSIGNMENT | cryoSPARC | v3.3.2 |
| FINAL EULER ASSIGNMENT | cryoSPARC | v4.2.1 |
| CLASSIFICATION | cryoSPARC | v4.2.1 |
| RECONSTRUCTION | cryoSPARC | v4.2.1 |
| MODEL REFINEMENT | Coot | 0.9.8.1 |
| MODEL REFINEMENT | PHENIX | 1.21rc1_5015 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | 4418492 | Particles picked using SPHIRE-crYOLO. | ||
