1AOE

CANDIDA ALBICANS DIHYDROFOLATE REDUCTASE COMPLEXED WITH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE (NADPH) AND 1,3-DIAMINO-7-(1-ETHYEPROPYE)-7H-PYRRALO-[3,2-F]QUINAZOLINE (GW345)


X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 6.5
Details A THREE-FOLD EXCESS OF GW345 AND THREE-FOLD EXCESS OF NADPH WAS ADDED TO THE C. ALBICANS DHFR SOLUTION AND LET STAND 277K OVERNIGHT. 17-20 MG/ML C. ALBICANS DHFR IN 50 UM GW345, 50 UM NADPH, 20 MM KMES, 1 MM DTT, PH 6.5 WAS MIXED WITH AN EQUAL PART OF 26 - 34% PEG-3350, THE RESERVOIR SOLUTION.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 77.91 α = 90
b = 67.28 β = 93.07
c = 38.49 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 1987-08-09
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
1.6 -- 91.7 -- 0.0458 -- 3.06 -- 45668 -- 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)
1.6 1.7 53.0 -- 0.235 3.06 1.59 --

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
DIRECT REPLACEMENT 1.6 10.0 -- 2.0 45668 41400 -- 91.7 -- -- 0.155 -- --
RMS Deviations
Key Refinement Restraint Deviation
p_mcbond_it 4.6
p_chiral_restr 0.241
p_angle_d 0.031
p_xyhbond_nbd 0.127
p_scangle_it 9.426
p_scbond_it 7.783
p_staggered_tor 14.9
p_mcangle_it 5.537
p_multtor_nbd 0.145
p_bond_d 0.02
p_transverse_tor 31.0
p_planar_d 0.036
p_plane_restr 0.02
p_planar_tor 3.8
p_singtor_nbd 0.165
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3182
Nucleic Acid Atoms 0
Heterogen Atoms 136
Solvent Atoms 353

Software

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