CRYSTAL STRUCTURE OF 8-AMINO-7-OXONANOATE SYNTHASE (OR 7-KETO-8AMINIPELARGONATE OR KAPA SYNTHASE) COMPLEXED WITH PLP AND THE PRODUCT 8(S)-AMINO-7-OXONANONOATE (OR KAPA). THE ENZYME OF BIOTIN BIOSYNTHETIC PATHWAY.
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, HANGING DROP | 8.5 | 289 | AMMONIUM SULPHATE, SODIUM CHLORIDE, BIS-TRIS PROPANE BUFFER, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 289.0K |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 1 | 49.39 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 58.89 | α = 90 |
| b = 58.89 | β = 90 |
| c = 201.77 | γ = 120 |
| Symmetry | |
|---|---|
| Space Group | P 31 1 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 | IMAGE PLATE | MARRESEARCH | 1998-01-01 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | SRS BEAMLINE PX7.2 | SRS | PX7.2 | |
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 | 1.99 | 31.62 | 99.3 | 0.065 | 6.3 | 2.9 | 28007 | 27822 | 37 | ||||||||||
| 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 | 1.99 | 2.06 | 93.5 | 0.452 | 2.7 | ||||||||||||||
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 (All) | R-Factor (Observed) | R-Work (Depositor) | R-Free (Depositor) | R-Free Selection Details | Mean Isotropic B | |||||
| X-RAY DIFFRACTION | AB INITIO | FREE R | 2 | 10 | 27177 | 27314 | 820 | 99.5 | 0.212 | 0.212 | 0.212 | 0.278 | RANDOM | ||||||
| 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] | |
| Coordinate Error | ||
|---|---|---|
| Structure Solution Method | Refinement High Resolution | Refinement Low Resolution |
| 3208 | ||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| s_similar_adp_cmpnt | 0.1 |
| s_zero_chiral_vol | 0.03 |
| s_non_zero_chiral_vol | 0.03 |
| s_from_restr_planes | 0.025 |
| s_angle_d | 0.02 |
| s_bond_d | 0.007 |
| s_similar_dist | |
| s_anti_bump_dis_restr | |
| s_rigid_bond_adp_cmpnt | |
| s_approx_iso_adps | |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 2912 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 337 |
| Heterogen Atoms | 39 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| X-PLOR | model building |
| SHELXL-97 | refinement |
| MAR345 | data collection |
| SCALEPACK | data scaling |
| X-PLOR | phasing |














