X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Hanging Drop
pH 6.5
Temperature 277.0
Details dihydro-nicotinamide-adenine-dinucleotide phosphate (NADPH), 5-(phenysulfanyl)-2,4-quinazolinediamine (GW997), PEG-3350, Potassium 4-morphilineerhanesulfonic acid, dithiothreitol (DTT) a three-fold excess of GW997 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 NADPH, 20 mm KMES, 1 mm DTT, PH 6.5 was mixed with an equal part of 26-34% PEG-3350, the reservoir solution., VAPOR DIFFUSION, HANGING DROP

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 76.91 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
1 293
Diffraction Detector
Detector Diffraction Type Details Collection Date
AREA DETECTOR XENTRONICS Huber graphite monochromator 1988-04-28
Diffraction Radiation
Monochromator Protocol
Huber Graphite Monochromator SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE ELLIOTT GX-21 1.5418 -- --

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
1.7 25 81.8 0.05 0.05 -- 3.26 113037 34713 0.0 -3.0 30.9
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)
1.7 1.81 41.14 0.2237 0.2237 2.15 2.31 2894

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 1.7 10.0 0.0 2.0 34713 31488 -- 81.8 0.156 0.156 0.156 -- --
High Resolution Shell
Refinement method Shell Resolution (High) Shell Resolution (Low) # of Reflections (Observed) # of Reflections (R-Free) # of Reflections (R-Work) R-Factor (R-Work) R-Factor (R-Free) R-Factor (R-Free Error) Percent Reflections (Observed)
X Ray Diffraction 1.7 1.8 1697 0 -- 0.204 -- -- --
X Ray Diffraction 1.8 2.0 5855 0 -- 0.162 -- -- --
X Ray Diffraction 2.0 2.16 4322 0 -- 0.15 -- -- --
X Ray Diffraction 2.16 2.39 4800 0 -- 0.152 -- -- --
X Ray Diffraction 2.39 2.77 5184 0 -- 0.162 -- -- --
X Ray Diffraction 2.77 3.63 5414 0 -- 0.151 -- -- --
X Ray Diffraction 3.63 10.0 4216 0 -- 0.163 -- -- --
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model Konnert, J.H. & Hendrickson, W.A. (1980) Acta Crystallogr. A A36, 344.
RMS Deviations
Key Refinement Restraint Deviation
p_bond_d 0.021
p_plane_restr 0.021
p_mcangle_it 3.218
p_chiral_restr 0.276
p_multtor_nbd 0.154
p_mcbond_it 2.63
p_planar_tor 4.0
p_scbond_it 4.073
p_singtor_nbd 0.166
p_planar_d 0.04
p_staggered_tor 16.1
p_scangle_it 5.478
p_angle_d 0.034
p_transverse_tor 31.4
p_xyhbond_nbd 0.127
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3195
Nucleic Acid Atoms 0
Heterogen Atoms 144
Solvent Atoms 236

Software

Software
Software Name Purpose
X-GEN data reduction
FRODO model building
PROFFT refinement
X-GEN data scaling