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Acoustically mounted porcine insulin microcrystals yield an X-ray SAD structure
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 4INS PDB ENTRY 4INS
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 SMALL TUBES 6 Microcrystals are obtained by dissolving 0.025 g protein in 5 mL of crystallizing solution (200 mL 0.02 M HCl, 100 mL 0.20 M sodium citrate, 60 mL acetone, 20 mL water, 20 mL 0.12 M zinc sulfate) at 315K. The solution is then rapidly quenched to 293K by immersing it in a cool water bath. Quenching speed determines the resulting crystal size. 20-micron crystals are obtained by quenching in a 293K water bath, 10-micron crystals by quenching in a 283K water bath, and 5-micron crystals by quenching in ice water. pH 6.0, SMALL TUBES
Crystal Properties Matthews coefficient Solvent content 1.88 34.42
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 81.7 α = 90 b = 81.7 β = 90 c = 33.8 γ = 120
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 4 2010-04-29 M SINGLE WAVELENGTH 2 1 x-ray 100 CCD ADSC QUANTUM 210 2010-07-30 M SINGLE WAVELENGTH 3 1 x-ray 100 CCD ADSC QUANTUM 315 2010-02-27 M SINGLE WAVELENGTH 4 1 x-ray 100 CCD MARMOSAIC 300 mm CCD 2009-12-19 M SINGLE WAVELENGTH 1,2,3,4 1
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON NSLS BEAMLINE X12B NSLS X12B 2 SYNCHROTRON NSLS BEAMLINE X12C NSLS X12C 3 SYNCHROTRON NSLS BEAMLINE X25 NSLS X25 4 SYNCHROTRON APS BEAMLINE 23-ID-D APS 23-ID-D
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 1,2,3,4 1.8 50 99.8 0.114 62.2 10.5 7783 7770
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 SAD THROUGHOUT PDB ENTRY 4INS 1.8 40.85 7783 7413 357 99.83 0.18338 0.18135 0.183 0.22311 0.2248 RANDOM 37.509
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] 0.18 0.09 0.18 -0.27
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 38.003 r_dihedral_angle_3_deg 17.954 r_dihedral_angle_4_deg 8.064 r_dihedral_angle_1_deg 6.773 r_scangle_it 5.716 r_scbond_it 3.423 r_angle_refined_deg 2.784 r_mcangle_it 2.626 r_mcbond_it 1.37 r_chiral_restr 0.134
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 38.003 r_dihedral_angle_3_deg 17.954 r_dihedral_angle_4_deg 8.064 r_dihedral_angle_1_deg 6.773 r_scangle_it 5.716 r_scbond_it 3.423 r_angle_refined_deg 2.784 r_mcangle_it 2.626 r_mcbond_it 1.37 r_chiral_restr 0.134 r_bond_refined_d 0.023 r_gen_planes_refined 0.009 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 806 Nucleic Acid Atoms Solvent Atoms 46 Heterogen Atoms 2
Software Software Software Name Purpose CBASS data collection SHELXS phasing REFMAC refinement HKL-2000 data reduction HKL-2000 data scaling