X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Macroseeding
pH 7
Details PROTEIN SEED CRYSTALS WERE OBTAINED FROM 60-70% AMMONIUM SULFATE, 10MM TRIS PH 7.0, 1-2% ACETONE. MACROSEEDS WERE TRANSFERRED TO THE ABOVE SOLUTION WITH NO ACETONE PRESENT., macroseeding

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 56.49 α = 90
b = 88.14 β = 90
c = 35.19 γ = 90
Symmetry
Space Group P 21 21 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 277
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MARRESEARCH MIRROR 1992-04
Diffraction Radiation
Monochromator Protocol
SI(111) --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON SRS BEAMLINE PX9.5 -- SRS PX9.5

Data Collection

Overall
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
1.8 20 89.2 0.062 0.062 -- 3.4 -- 12653 -- -3.0 18.5
High Resolution Shell
Resolution (High) Resolution (Low) Percent Possible (All) R Merge I (Observed) R-Sym I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All)
1.8 1.9 79.9 0.49 0.49 1.6 3.4 --

Refinement

Statistics
Structure Solution Method Refinement High Resolution Refinement Low Resolution Cut-off Sigma (I) Cut-off Sigma (F) Number of Reflections (All) Number of Reflections (Observed) Number of Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work R-Free R-Free Selection Details
MOLECULAR REPLACEMENT 1.8 10.0 -- 0.0 61954 61954 -- 89.3 -- -- 0.175 -- --
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 24.5
RMS Deviations
Key Refinement Restraint Deviation
p_transverse_tor 24.8
p_staggered_tor 17.7
p_planar_tor 2.4
p_xyhbond_nbd 0.18
p_multtor_nbd 0.25
p_bond_d 0.016
p_angle_d 0.046
p_planar_d 0.045
p_mcbond_it 3.1
p_mcangle_it 4.2
p_scbond_it 6.7
p_scangle_it 9.8
p_plane_restr 0.014
p_chiral_restr 0.16
p_singtor_nbd 0.19
Coordinate Error
Parameter Value
Luzzati Sigma A (Observed) 0.19
Luzzati Resolution Cutoff (Low) 10.0
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1107
Nucleic Acid Atoms 0
Heterogen Atoms 31
Solvent Atoms 126

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
MERLOT Structure Solution
CCP4 Structure Refinement
Software
Software Name Purpose
CCP4 refinement
MERLOT model building