X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 7.5
Details 17-20 MG/ML C. ALBICANS DHFR IN 20 MM KMES, 1 MM DTT, 0.1 MM EDTA, 20% GLYERCOL, PH 7.5 WAS MIXED WITH AN EQUAL PART OF 26 - 34% PEG-3350, THE RESERVOIR SOLUTION.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 77.2 α = 90
b = 67.57 β = 93.06
c = 38.66 γ = 90
Symmetry
Space Group P 1 21 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 295
Diffraction Detector
Detector Diffraction Type Details Collection Date
AREA DETECTOR SIEMENS MONOCHROMATOR 1987-05
Diffraction Radiation
Monochromator Protocol
HUBER MONOCHROMATOR --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE ELLIOTT GX-21 -- -- --

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
1.83 -- 90.3 -- 0.0664 -- 4.46 -- 31520 -- 2.0 --
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)
1.83 1.95 83.5 -- 0.3535 3.11 2.26 --

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 1.85 10.0 -- 2.0 31520 28540 -- 90.0 -- -- 0.199 -- --
RMS Deviations
Key Refinement Restraint Deviation
p_mcbond_it 0.913
p_mcangle_it 1.51
p_staggered_tor 17.6
p_transverse_tor 32.4
p_xyhbond_nbd 0.143
p_planar_d 0.04
p_angle_d 0.038
p_planar_tor 4.6
p_multtor_nbd 0.161
p_plane_restr 0.022
p_bond_d 0.025
p_singtor_nbd 0.172
p_scbond_it 1.638
p_chiral_restr 0.294
p_scangle_it 2.588
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3196
Nucleic Acid Atoms 0
Heterogen Atoms 96
Solvent Atoms 160

Software

Software
Software Name Purpose
MERLOT phasing
PROFFT refinement
XENGEN data reduction
XENGEN data scaling