1O3W

Structure of the inhibitor free triple mutant (K53,56,120M) of phospholipase A2


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1vapor diffusion method7.229350 mM Tris Buffer, 70% MPD reservoir,17-20Mg/ml prot,5 mM CaCl2 and 60% MPD in the droplet, pH 7.2, vapor diffusion method, temperature 293.0K
Crystal Properties
Matthews coefficientSolvent content
2.2143.89

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 46.76α = 90
b = 46.76β = 90
c = 102.71γ = 120
Symmetry
Space GroupP 31 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray293IMAGE PLATEMARRESEARCH2000-11-20MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODE

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
11.8519.9956.6110841053222.4
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
1.851.9298.30.3891110

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT1.8519.91108410532896950.1930.232random30.4
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]
3.283.93.28-6.55
RMS Deviations
KeyRefinement Restraint Deviation
c_dihedral_angle_d22.2
c_scangle_it3.12
c_scbond_it2.07
c_mcangle_it2.01
c_mcbond_it1.21
c_angle_deg1.2
c_improper_angle_d0.7
c_bond_d0.005
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms954
Nucleic Acid Atoms
Solvent Atoms93
Heterogen Atoms1

Software

Software
Software NamePurpose
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling