1C74

Structure of the double mutant (K53,56M) of phospholipase A2


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1vapor diffusion method7.2293Tris Buffer, MPD, 50% MPD reservoir, 15Mg/ml protein, 5 mM CaCl2, pH 7.2, vapor diffusion method, temperature 293.0K
Crystal Properties
Matthews coefficientSolvent content
2.3146.79

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 46.41α = 90
b = 46.41β = 90
c = 102.72γ = 120
Symmetry
Space GroupP 31 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray293IMAGE PLATEMARRESEARCH1999-08-15MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODESIEMENS

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (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
11.915890.0924.3297339733
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)
1.91.97710.333857

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTx-plor1MKT1.91042068949890.1890.224random
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]
RMS Deviations
KeyRefinement Restraint Deviation
x_bond_d0.011
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms955
Nucleic Acid Atoms
Solvent Atoms106
Heterogen Atoms1

Software

Software
Software NamePurpose
DENZOdata reduction
X-PLORmodel building
X-PLORrefinement
SCALEPACKdata scaling
X-PLORphasing