Structure of an unliganded and fully-glycosylated SIV gp120 envelope glycoprotein
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | 5 | 293 | PROTEIN WAS CRYSTALLIZED FROM 15% PEG 6000, 100 MM SODIUM CITRATE, PH 5.0 AND 8% PEG 400 AT 20 DEGREES C. | |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 3.98 | 68.8 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 108.048 | α = 90 |
| b = 108.048 | β = 90 |
| c = 117.701 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 43 21 2 |
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 CCD | RH-COATED SI MIRROR | 2002-10-07 | M | SINGLE WAVELENGTH | |||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | CHESS BEAMLINE F1 | CHESS | F1 | |
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge 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 | 4 | 26 | 98 | 0.08 | 12 | 4.5 | 100402 | 141.1 | |||||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
| 1 | 4 | 4.09 | 94.3 | 0.82 | 1.3 | 4 | |||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation method | Resolution (High) | Resolution (Low) | 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 | MIRAS | THROUGHOUT | 4 | 26 | 5842 | 279 | 98 | 0.385 | 0.385 | 0.3884 | 0.388 | 0.405 | RANDOM | 128.8 | |||||
| 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] | |
| 0.01 | 0.01 | -0.03 | ||||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 45.267 |
| r_dihedral_angle_3_deg | 24.209 |
| r_dihedral_angle_4_deg | 18.61 |
| r_dihedral_angle_1_deg | 8.116 |
| r_angle_refined_deg | 2.067 |
| r_symmetry_vdw_refined | 0.368 |
| r_nbtor_refined | 0.344 |
| r_nbd_refined | 0.341 |
| r_xyhbond_nbd_refined | 0.268 |
| r_symmetry_hbond_refined | 0.194 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 2471 |
| Nucleic Acid Atoms | |
| Solvent Atoms | |
| Heterogen Atoms | 615 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| DENZO | data reduction |
| SCALEPACK | data scaling |
| SOLVE | phasing |
| SHARP | phasing |
| REFMAC | refinement |
