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Structures of human carbonic anhydrase II inhibitor complexes reveal a second binding site for steroidal and non-steroidal inhibitors.
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1TTM PDB ENTRY 1TTM
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 8 277 100 MM TRIS-HCL, 1 MM ZNSO4, 2.38 M AMMONIUM SULFATE; 30 MM 2-MERCAPTOETHANOL, 2.5% GLYCEROL; 0.5 MM 2-METHOXYESTRADIOL 3-O-SULFAMATE, PH 8.0, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 277K
Crystal Properties Matthews coefficient Solvent content 1.8 31.9
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 42.502 α = 90 b = 69.54 β = 90 c = 73.207 γ = 90
Symmetry Space Group P 21 21 21
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 ADSC QUANTUM 4r MIRRORS 2007-01-19 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON SRS BEAMLINE PX14.2 SRS PX14.2
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 2.1 50 82 0.07 15.2 2.2 12877 17.6
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 2.1 2.23 42.1 0.38 2.8 2
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) 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 ENTRY 1TTM 2.12 26.91 10231 541 79.4 0.198 0.198 0.2034 0.253 0.1907 RANDOM 29.8
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] 2.56 -7.27 4.71
RMS Deviations Key Refinement Restraint Deviation c_dihedral_angle_d 24.5 c_scangle_it 2.89 c_mcangle_it 2.22 c_scbond_it 1.94 c_mcbond_it 1.39 c_angle_deg 1.3 c_improper_angle_d 0.89 c_bond_d 0.006 c_bond_d_na c_bond_d_prot
RMS Deviations Key Refinement Restraint Deviation c_dihedral_angle_d 24.5 c_scangle_it 2.89 c_mcangle_it 2.22 c_scbond_it 1.94 c_mcbond_it 1.39 c_angle_deg 1.3 c_improper_angle_d 0.89 c_bond_d 0.006 c_bond_d_na c_bond_d_prot c_angle_d c_angle_d_na c_angle_d_prot c_angle_deg_na c_angle_deg_prot c_dihedral_angle_d_na c_dihedral_angle_d_prot c_improper_angle_d_na c_improper_angle_d_prot
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 2049 Nucleic Acid Atoms Solvent Atoms 73 Heterogen Atoms 46
Software Software Software Name Purpose CNS refinement HKL-2000 data reduction HKL-2000 data scaling PHASER phasing