2BB4

Porcine pancreatic elastase complexed with beta-casomorphin-7 and Asp-Phe at pH 5.0


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 3EST 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP529425MM SODIUM SULPHATE, 25MM SODIUM ACETATE (PH 5.0), 25 MG/ML PPE, 17.5 MG/ML BETA-CASOMORPHIN-7, AND THEN SOAKED WITH ASP-PHE (2MG) IN 250MM SODIUM ACETATE (PH 5.0) (5 MICROLITRES) FOR 30 MIN, VAPOR DIFFUSION, HANGING DROP, temperature 294K
Crystal Properties
Matthews coefficientSolvent content
1.96728737.477356

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 49.884α = 90
b = 57.582β = 90
c = 74.142γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray127IMAGE PLATERIGAKU RAXIS IVOSMIC mirrors2005-06-29MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU MICROMAX-0071.54180

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
11.619.5990.02930.73.32861116.3
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)
11.61.6993.90.06115.233903

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT3EST1.619.52861128559144398.940.1740.1740.1730.197RANDOM25.223
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]
0.15-0.03-0.13
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg34.552
r_dihedral_angle_4_deg21.602
r_dihedral_angle_3_deg12.187
r_dihedral_angle_1_deg5.706
r_scangle_it4.81
r_scbond_it4.085
r_mcangle_it2.839
r_mcbond_it1.914
r_angle_refined_deg1.481
r_nbtor_refined0.309
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg34.552
r_dihedral_angle_4_deg21.602
r_dihedral_angle_3_deg12.187
r_dihedral_angle_1_deg5.706
r_scangle_it4.81
r_scbond_it4.085
r_mcangle_it2.839
r_mcbond_it1.914
r_angle_refined_deg1.481
r_nbtor_refined0.309
r_symmetry_vdw_refined0.22
r_symmetry_hbond_refined0.211
r_nbd_refined0.21
r_xyhbond_nbd_refined0.126
r_metal_ion_refined0.115
r_chiral_restr0.113
r_bond_refined_d0.014
r_gen_planes_refined0.007
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1817
Nucleic Acid Atoms
Solvent Atoms129
Heterogen Atoms13

Software

Software
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
MOSFLMdata reduction
CCP4data scaling