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The Type IE CRISPR Cascade complex from E. coli, with two assemblies in the asymmetric unit arranged back-to-back
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1VY8
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 291 0.1 M HEPES pH 7.0, 0-0.1 M KCl, and 8-14 percent (w/v) PEG 8000. The crystal used in this study grew in the presence of an 11-nt ssDNA containing a 5-CTT-3 PAM and nine nucleotides complementary to the crRNA-guide sequence in a 2:1 oligonucleotide:protein ratio. However, the target DNA is not observed in the electron
Crystal Properties Matthews coefficient Solvent content 3.44 64.27
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 105.99 α = 90 b = 244.8 β = 90 c = 426.74 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 80 IMAGE PLATE MAR scanner 300 mm plate 2014-03-22 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON APS BEAMLINE 23-ID-B 1.0 APS 23-ID-B
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (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 3.2 49.74 100 8 7.3 183649 2
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 3.2 3.25 100 2 6.9
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) Cut-off Sigma (F) 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) Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT FREE R-VALUE 1VY8 3.2 49.735 1.33 183492 2000 99.98 0.2127 0.2122 0.2129 0.2496 0.2503
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]
RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 11.459 f_angle_d 0.74 f_chiral_restr 0.034 f_bond_d 0.004 f_plane_restr 0.003
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 50706 Nucleic Acid Atoms 2600 Solvent Atoms Heterogen Atoms 2
Software Software Software Name Purpose PHENIX refinement XDS data reduction Aimless data scaling PHASER phasing