2QVD
Identification of a potent anti-inflammatory agent from the natural extract of plant Cardiospermun helicacabum: Crystal structure of the complex of phospholipase A2 with Benzo(g)-1,3-benzodioxolo(5,6-a)quinolizinium, 5,6-dihydro-9,10-dimethoxy at 1.93 A resolution
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 6.8 | 298 | 50mm Ammonium acetate, 0.2M ammonium sulphate, 30%PEG 4000, pH 6.8, VAPOR DIFFUSION, HANGING DROP, temperature 298K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.52 | 51.23 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 53.311 | α = 90 |
b = 53.311 | β = 90 |
c = 48.379 | γ = 90 |
Symmetry | |
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Space Group | P 43 |
Diffraction
Diffraction Experiment | ||||||||||||||
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ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
1 | 1 | x-ray | 291 | IMAGE PLATE | MAR scanner 345 mm plate | Mirror | 2007-08-02 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | ROTATING ANODE | RIGAKU RU300 | 1.54132 |
Data Collection
Overall | |||||||||||||||||||
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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 | 1.93 | 53.45 | 99.2 | 10240 | 9715 |
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 | 1.93 | 2 | 95.3 |
Refinement
Statistics | |||||||||||||||||||
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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 | R-Free | R-Free Selection Details | Mean Isotropic B | ||||
X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | 2PYC | 1.93 | 53.45 | 10240 | 9715 | 490 | 98.9 | 0.21 | 0.17765 | 0.1754 | 0.22435 | RANDOM | 32.511 |
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 | 0.47 | -0.95 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_3_deg | 18.245 |
r_scangle_it | 4.476 |
r_dihedral_angle_1_deg | 4.474 |
r_scbond_it | 2.834 |
r_mcangle_it | 2.116 |
r_angle_refined_deg | 1.802 |
r_mcbond_it | 1.137 |
r_symmetry_vdw_refined | 0.448 |
r_nbd_refined | 0.371 |
r_xyhbond_nbd_refined | 0.216 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 943 |
Nucleic Acid Atoms | |
Solvent Atoms | 112 |
Heterogen Atoms | 25 |
Software
Software | |
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Software Name | Purpose |
REFMAC | refinement |
MAR345dtb | data collection |
DENZO | data reduction |
SCALEPACK | data scaling |
AMoRE | phasing |