X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Details THIS ENTRY IS A MUTANT ALKALINE PHOSPHATE (H412N) IN WHICH HIS 412 IS REPLACED BY ASN, DETERMINED WITH CRYSTALS SOAKED IN STABILIZATION BUFFER CONTAINING NO ADDED ZINC. THERE IS ONE ZINC AND ONE MAGNESIUM COMPLEXED WITH INORGANIC PHOSPHATE BOUND IN EACH OF THE TWO ACTIVE SITES.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 194.76 α = 90
b = 167.74 β = 90
c = 76.23 γ = 90
Symmetry
Space Group I 2 2 2

Diffraction

Diffraction Detector
Detector Diffraction Type Details Collection Date
AREA DETECTOR ADSC -- 1993-05-14
Diffraction Radiation
Monochromator Protocol
-- --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
-- -- -- -- --

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
2.5 26.3 98.4 0.108 -- -- 4.6 -- 36882 -- 3.0 --

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
-- 2.6 8.0 -- 0.0 -- 38875 -- -- -- 0.166 0.166 -- --
RMS Deviations
Key Refinement Restraint Deviation
x_dihedral_angle_d 22.8
x_bond_d 0.02
x_improper_angle_d 1.67
x_angle_deg 2.01
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.27
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 6558
Nucleic Acid Atoms 0
Heterogen Atoms 14
Solvent Atoms 219

Software

Software
Software Name Purpose
ADSC data collection
X-PLOR model building
X-PLOR refinement
X-PLOR phasing