Crystal Structure of Torpedo Californica Acetylcholinesterase in Complex With an (R)-Tacrine(10)-Hupyridone Inhibitor.
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | 277 | PEG 200, pH 5.8, temperature 277K, VAPOR DIFFUSION, HANGING DROP. PROTEIN WAS CRYSTALLISED FROM 28% V/V PEG 200 0.5 M MES PH 5.8 AT 277K, SEEDING WITH TRIGONAL MICROCRYSTALS; THEN SOAKED IN MOTHER LIQUOR (40% V/V PEG 200 IN 0.1 M MES BUFFER, PH 5.8) CONTAINING 2 MM (RS)-(+/-)- TACRINE(10)-HUPYRIDONE ((5RS)-(+/-)-5-{[10-(1,2,3,4-TETRAHYDROACRIDIN-9-YLAMINO) DECYL] AMINO}-5,6,7,8-TETRAHYDRO-QUINOLIN-2(1H)-ONE) BIS-OXALATE FOR 17 HOURS. | ||
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 4.07 | 69.7 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 111.449 | α = 90 |
| b = 111.449 | β = 90 |
| c = 137.095 | γ = 120 |
| Symmetry | |
|---|---|
| Space Group | P 31 2 1 |
Diffraction
| Diffraction Experiment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
| 1 | 1 | x-ray | 120 | IMAGE PLATE | RIGAKU RAXIS IV | OSMIC BLUE CONFOCAL MIRRORS | 2000-09-07 | M | SINGLE WAVELENGTH | |||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | ROTATING ANODE | RIGAKU RUH3R | |||
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 | 2.3 | 30 | 98.5 | 0.068 | 21.9 | 1.59 | 44250 | 28.8 | |||||||||||
| 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 | 2.3 | 2.38 | 99.7 | 0.367 | 5.16 | 10 | |||||||||||||
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 | MOLECULAR REPLACEMENT | THROUGHOUT | 2.3 | 29.19 | 43555 | 2190 | 98.4 | 0.188 | 0.188 | 0.1819 | 0.23 | 0.2216 | RANDOM | 39.3 | |||||
| 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] | |
| 7.66 | 5.56 | 7.66 | -15.32 | |||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| c_dihedral_angle_d | 24.1 |
| c_scangle_it | 3.028 |
| c_scbond_it | 2.169 |
| c_mcangle_it | 1.959 |
| c_angle_deg | 1.9 |
| c_improper_angle_d | 1.38 |
| c_mcbond_it | 1.267 |
| c_bond_d | 0.116 |
| c_bond_d_na | |
| c_bond_d_prot | |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 4175 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 178 |
| Heterogen Atoms | 65 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| CNS | refinement |
| STRATEGY | data reduction |
| CCP4 | data scaling |
| XTALVIEW | refinement |
