3QXT
Structure of an Anti-Methotrexate CDR1-3 Graft VHH Antibody in Complex with Methotrexate
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | 7 | 293.15 | 1.0M Succinic Acid, 0.1M HEPES, 1% w/v PEG 2,000, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293.15K | |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 4.39 | 72.01 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 103.063 | α = 90 |
| b = 103.063 | β = 90 |
| c = 157.073 | γ = 120 |
| Symmetry | |
|---|---|
| Space Group | P 61 2 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 | MAR 225 | 2010-02-17 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | APS BEAMLINE 22-BM | APS | 22-BM | |
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 | 1.7 | 20 | 96.5 | 0.067 | 34.4 | 10.8 | 52887 | 2.9 | |||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation method | Resolution (High) | Resolution (Low) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B | ||||||
| X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | 1.7 | 20 | 50174 | 50174 | 2698 | 96.4 | 0.176 | 0.175 | 0.195 | RANDOM | 26.09 | ||||||
| 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] | |
| 1.03 | 0.52 | 1.03 | -1.55 | |||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 36.992 |
| r_dihedral_angle_4_deg | 18.669 |
| r_dihedral_angle_3_deg | 15.082 |
| r_scangle_it | 6.569 |
| r_dihedral_angle_1_deg | 5.517 |
| r_scbond_it | 4.484 |
| r_mcangle_it | 3.014 |
| r_angle_refined_deg | 2.499 |
| r_angle_other_deg | 2.043 |
| r_mcbond_it | 1.811 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 1904 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 222 |
| Heterogen Atoms | 71 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| HKL-2000 | data collection |
| PHASER | phasing |
| REFMAC | refinement |
| DENZO | data reduction |
| SCALA | data scaling |
