X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP296Initial crystals were grown by vapor diffusion using hanging drops formed from mixing a 2:1 volume ratio of the protein complex with an equilibration buffer consisting of 22.5-25% polyethylene glycol (PEG) molecular weight 3350 Da, 300 mM Li2SO4, and 100 mM Bis-Tris pH 5.8-6.2, at 23 C. Higher quality crystals were obtained by micro-seeding and addition of 5% PEG 400 as an additive. For cryoprotection crystals where transferred directly into a buffer with a 25% PEG 3350 Da, 5-10% PEG 400 Da, 300mM Li2SO4, 100mM Bis-Tris pH 5.8-6.2, 7.5% glycerol, and flash-cooled immediately afterward to -160 C. , VAPOR DIFFUSION, HANGING DROP, temperature 296K
Crystal Properties
Matthews coefficientSolvent content
2.4249.2

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 93.466α = 90
b = 93.256β = 100.94
c = 113.955γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray103CCDADSC QUANTUM 315rBeamline X29 features high-flux radiation derived from a 54-pole harmonic emission undulator, a vertically focusing mirror and a horizontally focusing monochromator. A Cryomech AL300 is utilized to produce extremely stable cooling on a Si(111) crystal. The beamline is capable of delivering an energy range of 7-15 kev2008-08-08MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSLS BEAMLINE X29A1.0809NSLSX29A

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12.25099.90.08910.56.297843
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
12.22.281000.7066.29784

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT2.240.9697422489099.840.2060.2040.248RANDOM26.151
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]
0.280.28-0.380.21
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg32.815
r_dihedral_angle_4_deg18.5
r_dihedral_angle_3_deg17.087
r_dihedral_angle_1_deg6.237
r_scangle_it3.533
r_scbond_it2.23
r_angle_refined_deg1.507
r_mcangle_it1.442
r_angle_other_deg0.914
r_mcbond_it0.768
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg32.815
r_dihedral_angle_4_deg18.5
r_dihedral_angle_3_deg17.087
r_dihedral_angle_1_deg6.237
r_scangle_it3.533
r_scbond_it2.23
r_angle_refined_deg1.507
r_mcangle_it1.442
r_angle_other_deg0.914
r_mcbond_it0.768
r_mcbond_other0.171
r_chiral_restr0.099
r_bond_refined_d0.015
r_gen_planes_refined0.006
r_bond_other_d0.001
r_gen_planes_other0.001
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms10625
Nucleic Acid Atoms
Solvent Atoms687
Heterogen Atoms

Software

Software
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection