STRUCTURAL EFFECTS INDUCED BY REMOVAL OF A DISULFIDE BRIDGE. THE X-RAY STRUCTURE OF THE C30A(SLASH)C51A MUTANT OF BASIC PANCREATIC TRYPSIN INHIBITOR AT 1.6 ANGSTROMS
X-RAY DIFFRACTION
Crystallization
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 1.93 | 36.3 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 74.36 | α = 90 |
| b = 23.26 | β = 90 |
| c = 28.88 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 21 21 21 |
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Resolution (High) | Resolution (Low) | Cut-off Sigma (I) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (Observed) | R-Work (Depositor) | R-Free (Depositor) | Mean Isotropic B | ||||||||
| X-RAY DIFFRACTION | 1.6 | 8 | 2 | 5510 | 0.17 | ||||||||||||||
| 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] | |
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| p_scangle_it | 5.231 |
| p_scbond_it | 3.518 |
| p_mcangle_it | 3.077 |
| p_mcbond_it | 2.194 |
| p_chiral_restr | 0.159 |
| p_planar_d | 0.07 |
| p_angle_d | 0.06 |
| p_bond_d | 0.02 |
| p_plane_restr | 0.02 |
| p_angle_deg | |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 462 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 70 |
| Heterogen Atoms | 5 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| PROLSQ | refinement |
