6QD4
MloK1 model from single particle analysis of 2D crystals, class 8 (intermediate conformation)
ELECTRON MICROSCOPY
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 6I9D | |
| Sample |
|---|
| MloK1 potassium channel in lipidic bilayer of 2D crystals |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | 2D ARRAY |
| Vitrification Instrument | |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 28498 |
| Reported Resolution (Å) | 5.6 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | Resolution estimated based on FSC between spherically-masked half-maps with a soft edge, with the FSC normalized to an expected volume corresponding t ... |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C4 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (6I9D) | ||||
| Refinement Space | |||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | The consensus model was flexibily fit in to the EM map of this class using Normal Mode Analysis with iMODFIT, and then real-space refined using PHENIX ... | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K2 SUMMIT (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) | 750 |
| Maximum Defocus (nm) | 4300 |
| 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 | 50000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| CTF CORRECTION | CTFFIND | |
| CTF CORRECTION | CTFTILT | |
| MODEL FITTING | iMODFIT | 1.44 |
| MODEL REFINEMENT | PHENIX | 1.13 |
| INITIAL EULER ASSIGNMENT | FOCUS | |
| FINAL EULER ASSIGNMENT | FREALIGN | 9.11 |
| CLASSIFICATION | FREALIGN | 9.11 |
| RECONSTRUCTION | FREALIGN | 9.11 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | The defocus at the center of each particle box was estimated based on the tilt geometry. | 231688 | The particle positions were given by the cross-correlation profile generated by the classical unbending algorithm. | |
