3JBJ
Cryo-EM reconstruction of F-actin
ELECTRON MICROSCOPY
| Sample |
|---|
| F-actin |
| Sample Components |
| skeletal muscle actin |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | FILAMENT |
| Vitrification Instrument | LEICA EM GP |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | 3 microliters of 0.3 micromolar actin was applied to the grid and incubated for 60 seconds at 25 degrees C. The grid was blotted for 2 seconds before ... |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | HELICAL |
| Number of Particles | |
| Reported Resolution (Å) | 7.6 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | (Helical Details: Single model IHRSR was performed with EMAN2 / SPARX and final reconstruction with FREALIGN (fixed helical parameters).) |
| Refinement Type | |
| Symmetry Type | HELICAL |
| Axial Symmetry | C1 |
| Axial Rise | 27.8 |
| Angular Rotation | 166.67 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (3J8A) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | REFINEMENT PROTOCOL--flexible DETAILS--Components were initially rigid body fit using Chimera, followed by flexible fitting with MDFF. | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN ULTRASCAN 4000 (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 25 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | 2014-05-13 |
| Temperature (Kelvin) | |
| Microscope Model | FEI TECNAI 20 |
| Minimum Defocus (nm) | 1500 |
| Maximum Defocus (nm) | 3000 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | 2 |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | GATAN LIQUID NITROGEN |
| Nominal Magnification | 100000 |
| Calibrated Magnification | 137615 |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 120 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| CTF CORRECTION | CTFFIND | 3 |
| MODEL FITTING | MDFF | |
| MODEL FITTING | UCSF Chimera | |
| RECONSTRUCTION | EMAN | 2 |
| RECONSTRUCTION | FREALIGN | |
| RECONSTRUCTION | SPARX | |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| FREALIGN (per segment) | ||||
