1X1L
Interaction of ERA,a GTPase protein, with the 3'minor domain of the 16S rRNA within the THERMUS THERMOPHILUS 30S subunit.
ELECTRON MICROSCOPY
| Sample |
|---|
| THERMUS THERMOPHILUS 30S ribosomal subunit complexed with Era |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | |
| Cryogen Name | |
| Sample Vitrification Details | Rapid-freezing in liquid ethane |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | |
| Reported Resolution (Å) | 13.5 |
| Resolution Method | |
| Other Details | projection matching using spider package. The coordinates for only the alpha carbons in protein and phosphoruses in rRNA are present in the structure ... |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (1FJF, 1EGA) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | RIGID BODY FIT | ||||
| Refinement Target | X-ray coordinates of the 30S ribosomal subunit and ERA were fitted into the 13.5 angstroms resolution CRYO-EM map of the T. Thermophilus 30S subunit-ERA complex. the atomic structure of ERA was fitted as 3 rigid bodies, N-terminal domain, C-terminal domain and C-terminal helix within the C-terminal domain. The resultant ERA structure was then energy minimized. The X-ray coordinates of T. Thermophilus 30S subunit was fitted as 4 rigid bodies, head, body, platform and 16S rRNA 3' minor domains. Only the coordinates of the 16S rRNA 3' minor domain and ERA are included HERE. The KH domain of ERA makes direct contact with the 3' terminus of the 16S rRNA. | ||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | METHOD--cross-correlation based manual fitting in O REFINEMENT PROTOCOL--MULTIPLE RIGID BODY | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | KODAK SO-163 FILM | ||||||||
| Electron Dose (electrons/Å**2) | 20 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | 2003-03-25 |
| Temperature (Kelvin) | 93 |
| Microscope Model | FEI TECNAI F20 |
| Minimum Defocus (nm) | 1180 |
| Maximum Defocus (nm) | 3940 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | 2 |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | |
| Nominal Magnification | 50000 |
| Calibrated Magnification | 49696 |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 200 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| MODEL FITTING | O | |
| RECONSTRUCTION | SPIDER | |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| CTF correction of 3D-maps by wiener filtration | ||||
