3MU8

Comparison of the character and the speed of X-ray-induced structural changes of porcine pancreatic elastase at two temperatures, 100 and 15K. The data set was collected from region B of the crystal. Fifth step of radiation damage


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1GVKPDB entry 1GVK

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP7.5291The initial concentration of the protein was 20 mg/ml in 10% glycerol solution. The reservoir contained a 250 mM Na2SO4. For cryo-protection, it was supplemented with 25% glycerol, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 291K
Crystal Properties
Matthews coefficientSolvent content
2.0941.24

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 50.117α = 90
b = 57.761β = 90
c = 74.996γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 3151.02-M FLAT MIRROR MADE OF ZERODUR PROVIDING VERTICAL FOCUSING AND REJECTION OF HARMONIC CONTAMINATION2008-03-20MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 19-ID0.97895APS19-ID

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
11.555099.40.02628.724.431778217.26
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)
1.551.61990.423.214.53111

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB entry 1GVK1.55319.5990.1830683155495.690.140.1380.1764Random22.32
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]
0.5519-1.49230.9404
RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d16.299
f_angle_d1.201
f_chiral_restr0.112
f_bond_d0.012
f_plane_restr0.007
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1822
Nucleic Acid Atoms
Solvent Atoms492
Heterogen Atoms11

Software

Software
Software NamePurpose
HKL-3000data collection
AMoREphasing
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling