Crystal structure of human caspase-1 (Thr388->Ala) in complex with 3-[2-(2-benzyloxycarbonylamino-3-methyl-butyrylamino)-propionylamino]-4-oxo-pentanoic acid (z-VAD-FMK)
X-RAY DIFFRACTION
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 1SC3 | PDB ENTRY 1SC3 |
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, HANGING DROP | 6 | 277 | 0.1 M PIPES, 200 mM (NH4)2SO4, 25% PEG 2000 MME, 10 mM DTT, 3 mM NaN3, 2 mM MgCl2, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.69 | 54.31 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 63.249 | α = 90 |
| b = 63.249 | β = 90 |
| c = 162.101 | 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 | 110 | IMAGE PLATE | RIGAKU RAXIS IV | 2004-01-29 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | ROTATING ANODE | RIGAKU RU300 | 1.54 | ||
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (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 | 1.8 | 20 | 96 | 31401 | 1 | 5 | |||||||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||||||
| 1 | 1.8 | 1.86 | 89.3 | ||||||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (All) | 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 | PDB ENTRY 1SC3 | 1.8 | 20 | 30074 | 28552 | 1522 | 95.77 | 0.229 | 0.21658 | 0.21507 | 0.21 | 0.24578 | 0.24 | RANDOM | 27.101 | ||
| Temperature Factor Modeling | ||||||
|---|---|---|---|---|---|---|
| Anisotropic B[1][1] | Anisotropic B[2][2] | Anisotropic B[3][3] | ||||
| 1.04 | 1.04 | -2.08 | ||||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 38.842 |
| r_dihedral_angle_4_deg | 14.958 |
| r_dihedral_angle_3_deg | 14.514 |
| r_dihedral_angle_1_deg | 4.968 |
| r_mcangle_it | 1.991 |
| r_scangle_it | 1.941 |
| r_scbond_it | 1.225 |
| r_mcbond_it | 1.214 |
| r_angle_refined_deg | 0.889 |
| r_nbtor_refined | 0.293 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 2071 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 272 |
| Heterogen Atoms | |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| REFMAC | refinement |
| CrystalClear | data reduction |
| d*TREK | data scaling |
| AMoRE | phasing |
