8HTT
Cryo-EM structure of human TMEM87A, gluconate-bound
ELECTRON MICROSCOPY
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 10.992 |
| f_angle_d | 0.475 |
| f_chiral_restr | 0.089 |
| f_bond_d | 0.002 |
| f_plane_restr | 0.002 |
| Sample |
|---|
| Transmembrane protein 87A with GFP tag and Twin-strep tag with gluconate |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 201915 |
| Reported Resolution (Å) | 3.6 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | Non-uniform refinement and CTF refinement were used to improve the particle alignment and map quality. |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | RIGID BODY FIT | ||||
| Refinement Target | |||||
| Overall B Value | 40 | ||||
| Fitting Procedure | |||||
| Details | Chimera Fit in map tool was used for initial local fitting. Then, Real-space refinement with the rigid body option in PHENIX was used for flexible fit ... | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K3 BIOQUANTUM (6k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 68.15 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | FEI TITAN KRIOS |
| Minimum Defocus (nm) | 800 |
| Maximum Defocus (nm) | 1900 |
| 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 | 105000 |
| Calibrated Magnification | 58900 |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details | Using Zemlin tableau in sherpa |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | cryoSPARC | 3.3.2 |
| IMAGE ACQUISITION | EPU | 2.13 |
| CTF CORRECTION | cryoSPARC | 3.3.2 |
| MODEL FITTING | UCSF Chimera | 1.16 |
| MODEL REFINEMENT | PHENIX | 1.19.2 |
| INITIAL EULER ASSIGNMENT | cryoSPARC | 3.3.2 |
| FINAL EULER ASSIGNMENT | cryoSPARC | 3.3.2 |
| CLASSIFICATION | cryoSPARC | 3.3.2 |
| RECONSTRUCTION | cryoSPARC | 3.3.2 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | PatchCTF in Cryosparc was used | 6035205 | The previous model was used as a template for particle picking. 2D class average images were generated as templates for subsequent reference-based auto-picking. | |
