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Crystal structure of Thermus thermophilus RNA polymerase holoenzyme at 3.3 angstroms resolution
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1IW7
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 5.85 293 33mM magnesium formate over a reservoir of 33mM magnesium formate, 30mM sodium citrate, pH 5.85, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Crystal Properties Matthews coefficient Solvent content 4.54 71
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 236.15 α = 90 b = 236.15 β = 90 c = 249.88 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 110 CCD ADSC QUANTUM 4 2003-10-28 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON NSLS BEAMLINE X25 1.1 NSLS X25
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 3.3 30 98.5 0.138 8.16 115975 115975 -1
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 3.3 3.42 93.7
Refinement Statistics Diffraction ID Structure Solution Method Starting model Resolution (High) Resolution (Low) Number Reflections (All) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Work (Depositor) R-Work (DCC) R-Free (Depositor) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT 1IW7 3.3 30 196849 196849 1953 84.1 0.282 0.2768 0.32 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]
RMS Deviations Key Refinement Restraint Deviation c_dihedral_angle_d 60 c_improper_angle_d 3 c_angle_deg 1.8 c_bond_d 0.009
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 53956 Nucleic Acid Atoms Solvent Atoms Heterogen Atoms 6
Software Software Software Name Purpose HKL-2000 data collection SCALEPACK data scaling CNS refinement HKL-2000 data reduction CNS phasing