Crystal Structure of human FABP4 in complex with 3-(4-chlorophenyl)-4,5,6,6a-tetrahydro-3aH-cyclopenta[d][1,2]oxazole-5-carboxylic acid, i.e. SMILES [C@@H]12C(=NO[C@@H]1C[C@H](C2)C(=O)O)c1ccc(cc1)Cl with IC50=6.1 microM
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 7 | 293 | protein in 25mM Tris/HCl pH 7.5 100mM NaCl, see also PMID 27658368 |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.18 | 43.56 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 32.364 | α = 90 |
| b = 53.865 | β = 90 |
| c = 75.114 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 21 21 21 |
Diffraction
| Diffraction Experiment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
| 1 | 1 | x-ray | 100 | PIXEL | PSI PILATUS 6M | 2012-02-05 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | SLS BEAMLINE X10SA | 0.700030 | SLS | X10SA |
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | R Sym I (Observed) | Rrim I (All) | CC (Half) | 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 | 1.02 | 37.56 | 99.7 | 0.047 | 0.047 | 0.053 | 1 | 15.34 | 6.54 | 67574 | 12.837 | ||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Rrim I (All) | CC (Half) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||
| 1 | 1.02 | 1.05 | 99.1 | 1.096 | 1.196 | 0.699 | 1.66 | 6.19 | |||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | 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 | inhouse model | 1.02 | 37.56 | 62259 | 3368 | 96.97 | 0.1347 | 0.1333 | 0.1329 | 0.1599 | 0.1593 | RANDOM | 14.618 | ||||
| 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] | |
| -0.47 | 0.25 | 0.22 | ||||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 29.835 |
| r_sphericity_free | 25.934 |
| r_dihedral_angle_4_deg | 18.025 |
| r_dihedral_angle_3_deg | 13.952 |
| r_sphericity_bonded | 13.248 |
| r_dihedral_angle_1_deg | 6.549 |
| r_rigid_bond_restr | 5.976 |
| r_angle_refined_deg | 2.397 |
| r_angle_other_deg | 0.934 |
| r_chiral_restr | 0.133 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 1040 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 230 |
| Heterogen Atoms | 72 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| XSCALE | data scaling |
| REFMAC | refinement |
| PDB_EXTRACT | data extraction |
| XDS | data reduction |
| PHASER | phasing |














