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Crystal Structure of Streptavidin Double Mutant S45A/D128A with Biotin: Cooperative Hydrogen-Bond Interactions in the Streptavidin-Biotin System.
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1SWE PDB entry 1SWE
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, SITTING DROP 6.5 294 sodium citrate, cacodylate, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 294K
Crystal Properties Matthews coefficient Solvent content 1.87 45.61
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 50.645 α = 90 b = 97.857 β = 112.28 c = 52.168 γ = 90
Symmetry Space Group P 1 21 1
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 100 IMAGE PLATE MARRESEARCH 2001-04-01 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON SSRL BEAMLINE BL9-1 0.97 SSRL BL9-1
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 1.65 50 99.6 0.099 14.8 57334 57334 -3
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) 1.65 1.68 98.5 0.542 1.5
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 (All) R-Factor (Observed) R-Work (Depositor) R-Work (DCC) R-Free (Depositor) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION ISOMORPHOUS THROUGHOUT PDB entry 1SWE 1.65 10 57069 57069 2853 99.6 0.204 0.204 0.2012 0.1856 0.2949 RANDOM
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]
Coordinate Error Structure Solution Method Refinement High Resolution Refinement Low Resolution 8 3881
RMS Deviations Key Refinement Restraint Deviation s_approx_iso_adps 0.081 s_non_zero_chiral_vol 0.049 s_zero_chiral_vol 0.037 s_similar_adp_cmpnt 0.031 s_from_restr_planes 0.0308 s_angle_d 0.027 s_anti_bump_dis_restr 0.01 s_bond_d 0.007 s_rigid_bond_adp_cmpnt 0.002 s_similar_dist
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 3547 Nucleic Acid Atoms Solvent Atoms 293 Heterogen Atoms 64
Software Software Software Name Purpose DENZO data reduction SCALEPACK data scaling SHELX model building SHELXL-97 refinement SHELX phasing