X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7.7
Details PROTEIN WAS CRYSTALLIZED FROM 0.55 M (NH4)2HPO4, 50 MM SODIUM CITRATE, PH 5.4, FINAL PH 7.7. CRYSTALS WERE HARVESTED IN 1.5 M (NH4)2HPO4, 50 MM SODIUM CITRATE, PH 5.4, FINAL PH 7.7; THEN SOAKED IN 1.5 M (NH4)2HPO4, 50 MM SODIUM CITRATE, PH 5.4, 25% GLYCEROL, FINAL PH 7.7, AND FLASH-COOLED WITH LIQUID NITROGEN.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 92.36 α = 90
b = 92.36 β = 90
c = 46.77 γ = 120
Symmetry
Space Group P 61

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 90
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD PRINCETON 2K MIRRORS 1996-10
Diffraction Radiation
Monochromator Protocol
HORIZONTALLY BENT SI (111), ASYMMETRICALLY CUT CRYSTALS --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON CHESS BEAMLINE F1 -- CHESS F1

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
1.7 16 99.5 0.073 0.073 -- 7.0 -- 25065 -- 0.0 --
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)
1.7 1.76 97.8 0.234 0.234 4.0 6.0 --

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
MAD 1.7 6.0 -- 0.0 -- 24473 2427 99.5 -- 0.205 0.227 0.255 RANDOM
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1513
Nucleic Acid Atoms 0
Heterogen Atoms 0
Solvent Atoms 211

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
MLPHARE Structure Solution
REFMAC Structure Refinement
Software
Software Name Purpose
REFMAC refinement
MLPHARE model building
SCALEPACK data reduction
DENZO data collection