1BOZ

STRUCTURE-BASED DESIGN AND SYNTHESIS OF LIPOPHILIC 2,4-DIAMINO-6-SUBSTITUTED QUINAZOLINES AND THEIR EVALUATION AS INHIBITORS OF DIHYDROFOLATE REDUCTASE AND POTENTIAL ANTITUMOR AGENTS


X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 6.5
Details pH 6.5

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 86.26 α = 90
b = 86.26 β = 90
c = 77.64 γ = 120
Symmetry
Space Group H 3

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 287
Diffraction Detector
Detector Diffraction Type Details Collection Date
IMAGE PLATE RIGAKU RAXIS -- --
Diffraction Radiation
Monochromator Protocol
NI FILTER SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE RIGAKU RU200 -- -- --

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
2.1 53 95.0 0.049 -- -- 2.5 -- 9706 -- 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)
2.1 -- 78.0 0.125 -- -- 2.5 --

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 2.1 8.0 -- 2.0 -- 8970 -- 95.0 -- -- 0.202 -- --
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 19.34
RMS Deviations
Key Refinement Restraint Deviation
p_angle_d 0.05
p_plane_restr 0.014
p_chiral_restr 0.191
p_singtor_nbd 0.197
p_xyhbond_nbd 0.259
p_planar_tor 2.4
p_bond_d 0.018
p_planar_d 0.051
p_staggered_tor 19.4
p_transverse_tor 22.5
p_multtor_nbd 0.262
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1495
Nucleic Acid Atoms 0
Heterogen Atoms 73
Solvent Atoms 125

Software

Software
Software Name Purpose
PROLSQ refinement
SCALEPACK data scaling