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A New Twist on the Translocation Mechanism of Helicases from the Structure of DnaB with its Substrates
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, SITTING DROP 6.5 290 4-7% PEG3350, 0.2 M calcium chloride, 0.1 M MES, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 290K
Crystal Properties Matthews coefficient Solvent content 3.04 59.59
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 149.124 α = 90 b = 180.321 β = 90 c = 279.128 γ = 90
Symmetry Space Group P 2 2 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 315 M SINGLE WAVELENGTH 2 1 x-ray 100 PIXEL DECTRIS PILATUS 6M 2011-04-04 M SINGLE WAVELENGTH 3 1 x-ray 100 CCD ADSC QUANTUM 315 2011-06-17 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON APS BEAMLINE 24-ID-C 1.11 APS 24-ID-C 2 SYNCHROTRON NSLS BEAMLINE X25 1.2545,1.2300,1.2549 NSLS X25 3 SYNCHROTRON NSLS BEAMLINE X29A 1.11 NSLS X29A
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 3.2 50 88.3 0.115 6.5 3 124032 124032
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1,2,3 3.2 3.42 87.6 2.8 9746
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method 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 SIRAS THROUGHOUT 3.2 47.92 108863 5442 87.77 0.245 0.242 0.2387 0.289 0.2807 RANDOM 140.749
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] -0.14 0.03 0.11
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 40.967 r_dihedral_angle_3_deg 21.808 r_dihedral_angle_4_deg 16.874 r_scangle_it 9.194 r_dihedral_angle_1_deg 7.344 r_mcangle_it 5.949 r_scbond_it 5.329 r_mcbond_it 3.266 r_angle_refined_deg 1.506 CHIRAL-CEN RESTRAINTS (A**3) 0.113
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 40.967 r_dihedral_angle_3_deg 21.808 r_dihedral_angle_4_deg 16.874 r_scangle_it 9.194 r_dihedral_angle_1_deg 7.344 r_mcangle_it 5.949 r_scbond_it 5.329 r_mcbond_it 3.266 r_angle_refined_deg 1.506 CHIRAL-CEN RESTRAINTS (A**3) 0.113 r_bond_refined_d 0.011 r_gen_planes_refined 0.005
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 39351 Nucleic Acid Atoms 540 Solvent Atoms 5 Heterogen Atoms 392
Software Software Software Name Purpose DENZO data reduction SCALEPACK data scaling SHELX phasing SHELX model building REFMAC refinement PDB_EXTRACT data extraction ADSC data collection CBASS data collection HKL-2000 data reduction HKL-2000 data scaling SHELXD phasing