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_transverse_tor 32.4
p_staggered_tor 17.6
p_planar_tor 4.6
p_xyhbond_nbd 0.143
p_multtor_nbd 0.161
p_bond_d 0.025
p_angle_d 0.038
p_planar_d 0.04
p_mcbond_it 0.913
p_mcangle_it 1.51
p_scbond_it 1.638
p_scangle_it 2.588
p_plane_restr 0.022
p_chiral_restr 0.294
p_singtor_nbd 0.172
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3128
Nucleic Acid Atoms 0
Heterogen Atoms 96
Solvent Atoms 160

Software

Computing
Computing Package Purpose
XENGEN Data Reduction (intensity integration)
XENGEN Data Reduction (data scaling)
MERLOT Structure Solution
PROFFT Structure Refinement
Software
Software Name Purpose
PROFFT refinement
MERLOT model building