X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7.5
Temperature 277.0
Details PROTEIN WAS CRYSTALLIZED AT 4 DEGREES CELSIUS FROM 2.4 M (NH4)2SO4, 1% (V/V) PEG 400, 0.1 M NA-HEPES, PH 7.5. PRIOR TO DATA COLLECTION, THE CRYSTALS WERE TRANSFERRED TO SOLUTIONS OF 40 % (V/V) PEG 400, 0.1 M NA-HEPES, PH 7.5 CONTAINING 0.05 M ALANINE-PROLINE DIPEPTIDE., temperature 277K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 49 α = 90
b = 49 β = 90
c = 137.8 γ = 90
Symmetry
Space Group P 43 21 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MARRESEARCH -- 1996-03
Diffraction Radiation
Monochromator Protocol
-- --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON SSRL BEAMLINE BL7-1 -- SSRL BL7-1

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
1.35 25 95.5 -- 0.053 -- 4.5 -- 33672 -- -- --
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)
1.35 1.39 69.0 -- 0.592 2.0 -- --

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
RIGID BODY REFINEMENT USING MIRAS DERIVED STRUCTURE 1.35 6.0 -- 0.0 -- 31532 1678 95.0 -- 0.223 0.223 0.266 RANDOM
High Resolution Shell
Refinement method Shell Resolution (High) Shell Resolution (Low) # of Reflections (Observed) # of Reflections (R-Free) # of Reflections (R-Work) R-Factor (R-Work) R-Factor (R-Free) R-Factor (R-Free Error) Percent Reflections (Observed)
X Ray Diffraction 1.35 1.39 -- 106 2054 0.377 0.372 0.05 69.0
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 20.0
RMS Deviations
Key Refinement Restraint Deviation
x_improper_angle_d 1.27
x_bond_d 0.008
x_scbond_it 2.0
x_mcbond_it 1.0
x_scangle_it 2.0
x_angle_deg 1.78
x_mcangle_it 1.5
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1213
Nucleic Acid Atoms 0
Heterogen Atoms 41
Solvent Atoms 204

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
X-PLOR 3.851 Structure Solution
X-PLOR 3.851 Structure Refinement
Software
Software Name Purpose
X-PLOR version: 3.851 model building
X-PLOR version: 3.851 refinement