X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 6.5
Details C82A MUTANT WAS CRYSTALLIZED FROM 40-60% AMMONIUM SULFATE, 50MM PHOSPHATE, PH=6.5. PROTEIN CONC=45 MG/ML. C40A AND DTNB LABELLED CRYSTALS ALSO CRYSTALLIZED BUT DID NOT DIFFRACT TO HIGH RESOLUTION.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 104.18 α = 90
b = 104.18 β = 90
c = 36 γ = 90
Symmetry
Space Group I 41

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 293
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE MARRESEARCH MIRRORS 1996-12
Diffraction Radiation
Monochromator Protocol
-- --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE RIGAKU RUH2R -- -- --

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
2.76 10 85.0 0.076 -- -- 7.0 -- 4796 -- 2.0 61.2
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)
2.8 2.9 50.0 0.05 -- -- 7.0 --

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
MOLECULAR REPLACEMENT 2.76 10.0 -- 1.0 -- 4081 618 85.0 -- 0.203 0.203 0.292 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 2.8 2.9 -- 33 226 0.465 0.465 0.081 55.8
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 48.4
RMS Deviations
Key Refinement Restraint Deviation
x_improper_angle_d 0.54
x_bond_d 0.008
x_angle_deg 1.2
x_dihedral_angle_d 26.8
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.4
Luzzati Sigma A (Observed) 0.57
Luzzati Resolution Cutoff (Low) 5.0
Luzzati ESD (R-Free Set) 0.52
Luzzati Sigma A (R-Free Set) 0.59
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1438
Nucleic Acid Atoms 0
Heterogen Atoms 0
Solvent Atoms 0

Software

Computing
Computing Package Purpose
MARXDS Data Reduction (intensity integration)
MARSCALE 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