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Crystal structure of the Bowman-Birk serine protease inhibitor BTCI in complex with trypsin and chymotrypsin
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 2G81 PDB ENTRIES 2G81 AND 4CHA experimental model PDB 4CHA PDB ENTRIES 2G81 AND 4CHA
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, SITTING DROP 7.5 294 0.1 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 coefficient Solvent content 2.92 57.84
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 49.477 α = 67.28 b = 54.571 β = 71.04 c = 69.286 γ = 73.55
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 100 CCD MAR CCD 165 mm mirrors 2007-03-30 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON LNLS BEAMLINE D03B-MX1 1.4270 LNLS D03B-MX1
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) Net I Over Average Sigma (I) Redundancy Number Reflections (All) Number Reflections (Observed) Observed Criterion Sigma (F) Observed Criterion Sigma (I) B (Isotropic) From Wilson Plot 1 1.675 62.02 80.6 0.099 11.87 2 57400 57400
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) R Merge I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 1.675 1.74 27.2 0.37 1.28 1.2
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) Number Reflections (All) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (Observed) R-Work (Depositor) R-Work (DCC) R-Free (Depositor) R-Free (DCC) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT THROUGHOUT PDB ENTRIES 2G81 AND 4CHA 1.68 62.02 54466 54466 2899 80.22 0.15901 0.1572 0.1581 0.19249 0.1929 RANDOM 23.518
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 -0.06 1.17 -0.76 0.57 -0.78
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 36.026 r_dihedral_angle_4_deg 24.568 r_dihedral_angle_3_deg 14.348 r_dihedral_angle_1_deg 7.222 r_scangle_it 3.879 r_scbond_it 2.833 r_angle_refined_deg 2.24 r_mcangle_it 1.605 r_mcbond_it 1.058 r_chiral_restr 0.129
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 36.026 r_dihedral_angle_4_deg 24.568 r_dihedral_angle_3_deg 14.348 r_dihedral_angle_1_deg 7.222 r_scangle_it 3.879 r_scbond_it 2.833 r_angle_refined_deg 2.24 r_mcangle_it 1.605 r_mcbond_it 1.058 r_chiral_restr 0.129 r_bond_refined_d 0.021 r_gen_planes_refined 0.011 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 Atoms Number Protein Atoms 3834 Nucleic Acid Atoms Solvent Atoms 694 Heterogen Atoms 122
Software Software Software Name Purpose MOLREP phasing REFMAC refinement HKL-2000 data reduction SCALEPACK data scaling