CRYSTALLOGRAPHIC STUDIES OF THE BINDING OF PROTONATED AND UNPROTONATED INHIBITORS TO CARBONIC ANHYDRASE USING HYDROGEN SULPHIDE AND NITRATE ANIONS
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | 277 | THIS IS THE HIGH-ACTIVITY ERYTHROCYTIC FORM OF HUMAN CARBONIC ANHYDRASE, CARBONIC ANHYDRASE II, OR CAII. CRYSTALLIZED IN 50 MM TRIS-HCL 2.4 M AMMONIUM SULFATE PH 8.5 AND 1 MM HGCL2 AT 4 DEG C (TILANDER, B., STRANDBERG, B. AND FRIDBORG, K. (1965). CRYSTAL STRUCTURE ON HUMAN ERYTHROCYTIC CARBONIC ANHYDRASE C. J. MOL. BIOL. 12, 740-760.) THE MERCURY IS SUBSEQUENTLY REMOVED BY MERCAPTOETHANOL. THE CRYSTAL IS SOAKED IN 0.6M KNO3 80 MM CITRATE 3M AMMONIUM SULFATE PH 6.0., temperature 277K | ||
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.15 | 42.89 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 42.7 | α = 90 |
| b = 41.7 | β = 104.6 |
| c = 73 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 1 21 1 |
Diffraction
| Diffraction Experiment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
| 1 | 1 | x-ray | ||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Resolution (High) | Resolution (Low) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (Observed) | R-Work (Depositor) | R-Work (DCC) | R-Free (Depositor) | Mean Isotropic B | |||||||||
| X-RAY DIFFRACTION | 1.9 | 0.141 | 0.1801 | ||||||||||||||||
| 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 |
| t_angle_deg | 3.4 |
| t_bond_d | 0.021 |
| t_dihedral_angle_d | |
| t_incorr_chiral_ct | |
| t_pseud_angle | |
| t_trig_c_planes | |
| t_gen_planes | |
| t_it | |
| t_nbd | |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 2088 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 231 |
| Heterogen Atoms | 6 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| TNT | refinement |
