X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Sitting Drop
pH 5
Details CRYSTALS WERE GROWN BY VAPOR DIFFUSION ON SITTING DROP BRIDGES. THE WELL MIX OF 20-24% PEG6000 BUFFERED WITH 100 MM NA ACETATE PH 5.0 WAS MIXED 1:1 WITH 3 UL OF I DOMAIN PROTEIN (20-30 MG/ML, 50 MM HEPES PH 7.0, 0.025% NA AZIDE). CRYSTALS WERE STABLIZED IN 10MM CDCL2, 100 MM NA ACETATE 5.0, 26% PEG6000 FOR DATA COLLECTION., vapor diffusion - sitting drop

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 48.42 α = 90
b = 122.39 β = 90
c = 75.36 γ = 90
Symmetry
Space Group P 21 21 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 287
Diffraction Detector
Detector Diffraction Type Details Collection Date
AREA DETECTOR SIEMENS -- 1994-08
Diffraction Radiation
Monochromator Protocol
GRAPHITE(002) --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
-- SIEMENS -- -- --

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
2.7 10 43.9 -- 0.097 -- 3.1 -- 7424 -- 2.0 --
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)
2.65 2.91 43.3 -- 0.192 3.1 1.7 --

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
ISOMORPHOUS TO KNOWN PDB ENTRY 1IDN 2.7 10.0 -- 2.0 -- 8618 -- 43.9 -- 0.175 0.175 -- --
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 10.63
RMS Deviations
Key Refinement Restraint Deviation
p_transverse_tor 21.0
p_staggered_tor 9.1
p_planar_tor 2.2
p_xyhbond_nbd 0.256
p_multtor_nbd 0.259
p_bond_d 0.018
p_angle_d 0.036
p_planar_d 0.034
p_mcbond_it 0.552
p_mcangle_it 0.964
p_scbond_it 0.796
p_scangle_it 1.341
p_plane_restr 0.013
p_chiral_restr 0.201
p_singtor_nbd 0.197
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3054
Nucleic Acid Atoms 0
Heterogen Atoms 9
Solvent Atoms 137

Software

Computing
Computing Package Purpose
XENGEN Data Reduction (intensity integration)
XENGEN Data Reduction (data scaling)
PROLSQ Structure Refinement
Software
Software Name Purpose
PROLSQ refinement