ELECTRON MICROSCOPY
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 4A7N | |
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 14.737 |
| f_angle_d | 1.097 |
| f_chiral_restr | 0.04 |
| f_plane_restr | 0.005 |
| f_bond_d | 0.004 |
| Sample |
|---|
| F-actin-tropomyosin complex |
| Sample Components |
| F-actin (alpha) |
| tropomyosin (alpha) |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | FILAMENT |
| Vitrification Instrument | GATAN CRYOPLUNGE 3 |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | Sample was applied to grid, incubated for 10 seconds, and manually blotted for 3 seconds from the backside with filter paper before plunging into liqu ... |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | HELICAL |
| Number of Particles | |
| Reported Resolution (Å) | 3.7 |
| Resolution Method | FSC 0.5 CUT-OFF |
| Other Details | The tropomyosin map filtered to 6.5 Angstrom was merged with the final F-actin map (3.7 Angstrom) to obtain a map of the entire F-actin tropomyosin co ... |
| Refinement Type | |
| Symmetry Type | HELICAL |
| Axial Symmetry | C1 |
| Axial Rise | 27.5 |
| Angular Rotation | 166.4 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (4A7N, 4A7N, 4A7N, 4A7N, 4A7N) | 2 | |||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | FLEXIBLE FIT | |||
| Refinement Target | R-factor | cross-correlation | |||
| Overall B Value | 55.4 | ||||
| Fitting Procedure | |||||
| Details | METHOD--maximum likelihood, flexible fitting | METHOD--flexible fitting | |||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | FEI FALCON II (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 14.6 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | 2013-10-17 |
| Temperature (Kelvin) | |
| Microscope Model | FEI TITAN KRIOS |
| Minimum Defocus (nm) | 800 |
| Maximum Defocus (nm) | 2600 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | FEI TITAN KRIOS AUTOGRID HOLDER |
| Nominal Magnification | 59000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details | Cs-corrected microscope |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| MODEL FITTING | Coot | |
| MODEL FITTING | DireX | |
| MODEL FITTING | PHENIX | |
| RECONSTRUCTION | SPARX | |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| each micrograph | ||||
