3RU4

Crystal structure of the Bowman-Birk serine protease inhibitor BTCI in complex with trypsin and chymotrypsin


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP7.52940.1 M HEPES pH 7.5, 10%(w/v) polyethylene glycol (PEG) 6000, 5%(v/v) 2-methyl-2,4-pentanediol (MPD), VAPOR DIFFUSION, SITTING DROP, temperature 294K
Crystal Properties
Matthews coefficientSolvent content
2.9257.84

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 49.477α = 67.28
b = 54.571β = 71.04
c = 69.286γ = 73.55
Symmetry
Space GroupP 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDMAR CCD 165 mmmirrors2007-03-30MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONLNLS BEAMLINE D03B-MX11.4270LNLSD03B-MX1

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
11.67562.0280.60.09911.8725740057400
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)
11.6751.7427.20.371.281.2

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 (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB ENTRIES 2G81 AND 4CHA1.6862.025446654466289980.220.159010.15720.19249RANDOM23.518
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]
0.38-0.061.17-0.760.57-0.78
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg36.026
r_dihedral_angle_4_deg24.568
r_dihedral_angle_3_deg14.348
r_dihedral_angle_1_deg7.222
r_scangle_it3.879
r_scbond_it2.833
r_angle_refined_deg2.24
r_mcangle_it1.605
r_mcbond_it1.058
r_chiral_restr0.129
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg36.026
r_dihedral_angle_4_deg24.568
r_dihedral_angle_3_deg14.348
r_dihedral_angle_1_deg7.222
r_scangle_it3.879
r_scbond_it2.833
r_angle_refined_deg2.24
r_mcangle_it1.605
r_mcbond_it1.058
r_chiral_restr0.129
r_bond_refined_d0.021
r_gen_planes_refined0.011
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms3834
Nucleic Acid Atoms
Solvent Atoms694
Heterogen Atoms122

Software

Software
Software NamePurpose
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling