X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 4.5
Temperature 291.0
Details THE ISOIONIC PROTEIN HEWL WAS ACIDIFIED BY ADDING OF HI UNTIL THE PH 4.5 WAS REACHED AT 291K WERE 25 MG/ML OF PROTEIN AND 0.07 M OF NAI VERSUS A WELL CONTAINING 0.14 M OF NAI AT PH4.5

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 27.73 α = 90
b = 62.79 β = 90.1
c = 59.84 γ = 90
Symmetry
Space Group P 1 21 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 293
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MARRESEARCH -- 1992-12-01
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON LURE BEAMLINE DW32 -- LURE DW32

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
1.6 13.3 96.7 -- 0.095 -- 3.1 -- 26152 -- 0.0 15.2
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)
1.6 1.64 95.6 -- 0.54 1.3 2.8 --

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 1.6 8.0 -- 0.0 -- 26000 2612 96.6 -- 0.198 0.198 0.237 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 1.6 1.67 -- 320 2861 0.294 0.345 -- 95.3
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 16.4
RMS Deviations
Key Refinement Restraint Deviation
x_scangle_it 3.7
x_scbond_it 3.21
x_mcangle_it 2.73
x_mcbond_it 2.5
x_improper_angle_d 0.59
x_bond_d 0.004
x_angle_deg 1.16
x_dihedral_angle_d 25.27
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.18
Luzzati Resolution Cutoff (Low) 5.0
Luzzati ESD (R-Free Set) 0.22
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2002
Nucleic Acid Atoms 0
Heterogen Atoms 17
Solvent Atoms 291

Software

Computing
Computing Package Purpose
MOSFLM Data Reduction (intensity integration)
AGROVATA Data Reduction (data scaling)
AMORE Structure Solution
X-PLOR 3.851 Structure Refinement
Software
Software Name Purpose
X-PLOR version: 3.851 refinement
AMORE model building
AGROVATA/CCP4 data reduction
MOSFLM data collection