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Crystal structure of the 20s proteasome from yeast in complex with the proteasome activator PA26 from Trypanosome brucei at 3.2 angstroms resolution
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1RYP one-half of the yeast 20S proteasome (Huber, et al., high-resolution structure), pdb entry 1RYP
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, SITTING DROP 7.5 298 0.1 M NaHEPES, 40% MPD, 0.2 M NACL, pH 7.50, VAPOR DIFFUSION, SITTING DROP, temperature 298K
Crystal Properties Matthews coefficient Solvent content 3.08 60.04
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 192.964 α = 90 b = 232.127 β = 90 c = 296.772 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 IMAGE PLATE MARRESEARCH 2000-02-15 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON SSRL BEAMLINE BL9-1 0.98 SSRL BL9-1
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) R Sym 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 3.2 50 89.1 0.112 0.112 7 2.7 189615 189615
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) R Merge I (Observed) R-Sym I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 3.2 3.26 0.0629 0.331 0.331 1.9 2.5
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-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 one-half of the yeast 20S proteasome (Huber, et al., high-resolution structure), pdb entry 1RYP 3.22 39.8 189615 189495 1264 89.1 0.263 0.263 0.275 0.308 0.3122 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]
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 74222 Nucleic Acid Atoms Solvent Atoms Heterogen Atoms
Software Software Software Name Purpose DENZO data reduction SCALEPACK data scaling AMoRE phasing CNS refinement