Crystal structure of the protein-translocation complex formed by the SecY channel and the SecA ATPase
X-RAY DIFFRACTION
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details | 
| experimental model | PDB | 1TF2 | PDB ENTRY 1TF2 | 
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details | 
| 1 | 7.5 | 298 | 20% PEG 3350, 200mM (NH4)2SO4, pH 7.5, VAPOR DIFFUSION, temperature 298K | |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content | 
| 4.32 | 71.5 | 
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) | 
| a = 101.616 | α = 90 | 
| b = 156.003 | β = 90 | 
| c = 358.155 | γ = 90 | 
| Symmetry | |
|---|---|
| Space Group | P 21 21 21 | 
Diffraction
| Diffraction Experiment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
| 1 | 1 | x-ray | 100 | CCD | ADSC QUANTUM 315 | Cryogenically cooled first crystal, sagitally focusing 2nd crystal, Rosenbaum-Rock vertical focusing mirror | 2007-08-15 | M | SINGLE WAVELENGTH | |||||
| 2 | 1 | x-ray | 100 | CCD | ADSC QUANTUM 315 | Triple striped vertical and horizantal focussing mirrors in Kirkpatrick-Baez geometry | 2007-10-17 | M | SINGLE WAVELENGTH | |||||
| 3 | 1 | x-ray | 100 | CCD | ADSC QUANTUM 315 | sagitally bent second mono crystal with 4:1 magnification ratio and vertically focusing mirror | 2008-02-29 | M | SINGLE WAVELENGTH | |||||
| 1,2,3 | 1 | |||||||||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline | 
| 1 | SYNCHROTRON | APS BEAMLINE 19-ID | 0.97950 | APS | 19-ID | 
| 2 | SYNCHROTRON | APS BEAMLINE 24-ID-C | 0.97950 | APS | 24-ID-C | 
| 3 | SYNCHROTRON | NSLS BEAMLINE X29A | 0.97950 | NSLS | X29A | 
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Sym I (Observed) | Net I Over Average Sigma (I) | Redundancy | Number Reflections (All) | Number Reflections (Observed) | Observed Criterion Sigma (F) | Observed Criterion Sigma (I) | B (Isotropic) From Wilson Plot | ||||||||
| 1,2,3 | 4.5 | 50 | 97.7 | 0.065 | 16.1 | 11.6 | 34733 | ||||||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R-Sym I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
| 1,2,3 | 4.5 | 4.77 | 89.7 | 0.85 | 2 | 8.8 | |||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | Cut-off Sigma (F) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (Observed) | R-Work (Depositor) | R-Work (DCC) | R-Free (Depositor) | R-Free (DCC) | R-Free Selection Details | Mean Isotropic B | ||
| X-RAY DIFFRACTION | SAD, MOLECULAR REPLACEMENT | THROUGHOUT | PDB ENTRY 1TF2 | 4.5 | 15 | 2 | 34733 | 34733 | 3269 | 97.7 | 0.279 | 0.279 | 0.29 | 0.303 | 0.29 | RANDOM | 358.2 | ||
| Temperature Factor Modeling | ||||||
|---|---|---|---|---|---|---|
| Anisotropic B[1][1] | Anisotropic B[1][2] | Anisotropic B[1][3] | Anisotropic B[2][2] | Anisotropic B[2][3] | Anisotropic B[3][3] | |
| 9.68 | 13.17 | -22.85 | ||||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation | 
| c_dihedral_angle_d | 21 | 
| c_angle_deg | 1.3 | 
| c_improper_angle_d | 0.87 | 
| c_bond_d | 0.006 | 
| c_bond_d_na | |
| c_bond_d_prot | |
| c_angle_d | |
| c_angle_d_na | |
| c_angle_d_prot | |
| c_angle_deg_na | |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number | 
| Protein Atoms | 21304 | 
| Nucleic Acid Atoms | |
| Solvent Atoms | |
| Heterogen Atoms | 64 | 
Software
| Software | |
|---|---|
| Software Name | Purpose | 
| DENZO | data reduction | 
| SCALEPACK | data scaling | 
| PHASER | phasing | 
| SOLVE | phasing | 
| DM | phasing | 
| CNS | refinement | 
| PDB_EXTRACT | data extraction | 














