6WXB
Cryo-EM Structure of Influenza Hemagglutinin (HA) Trimer Vitrified Using Back-it-up
ELECTRON MICROSCOPY
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 11.0826 |
| f_angle_d | 1.0071 |
| f_chiral_restr | 0.0802 |
| f_bond_d | 0.0078 |
| f_plane_restr | 0.0062 |
| Sample |
|---|
| Influenza Hemagglutinin Trimer (H3N2) (A/Hong Kong/1/1968) |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | HOMEMADE PLUNGER |
| Cryogen Name | ETHANE-PROPANE |
| Sample Vitrification Details | Back-it-up (ultrasonic specimen application and through-grid wicking in a high-speed specimen preparation device) was used |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 128305 |
| Reported Resolution (Å) | 2.9 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C3 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (3WHE) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | RIGID BODY FIT | ||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | FEI FALCON IV (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 45 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | FEI TITAN KRIOS |
| Minimum Defocus (nm) | |
| Maximum Defocus (nm) | |
| 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 | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | cryoSPARC | 2 |
| IMAGE ACQUISITION | EPU | 2.6 |
| CTF CORRECTION | cryoSPARC | 2 |
| MODEL FITTING | UCSF Chimera | 1.13 |
| INITIAL EULER ASSIGNMENT | cryoSPARC | 2 |
| FINAL EULER ASSIGNMENT | cryoSPARC | 2 |
| RECONSTRUCTION | cryoSPARC | 2 |
| MODEL REFINEMENT | Coot | 0.8 |
| 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 | 378143 | |||
