1M7A

CANDIDA ALBICANS DIHYDROFOLATE REDUCTASE COMPLEXED WITH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE (NADPH) AND 7-[2-methoxy-1-(methoxymethyl)ethyl]-7H-pyrrolo[3,2-f] quinazoline-1,3-diamine (GW557)


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), 7-[2-METHOXY-1-(METHOXYMETHYL)ETHYL]-7H-PYRROLO[3,2-F] QUINAZOLINE-1,3-DIAMINE (GW557), PEG-3350, Potassium 4-morphilineethanesulfonic acid (MES), dithiothreitol (DTT), pH 6.50, VAPOR DIFFUSION, HANGING DROP, temperature 277K

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 1989-05-06
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
1.76 50 94.9 0.0552 0.0552 -- 3.18 -- 36247 0.0 -3.0 31.86
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)
1.76 1.83 72.76 0.193 0.193 2.77 1.693 4590

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 1.76 10.0 -3.0 2.0 36248 33335 -- 94.9 -- 0.1506 0.1506 -- --
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 1.76 1.8 337 -- -- 0.21 -- -- --
X Ray Diffraction 1.8 1.93 5061 -- -- 0.176 -- -- --
X Ray Diffraction 1.93 2.1 5841 -- -- 0.156 -- -- --
X Ray Diffraction 2.1 2.3 5136 -- -- 0.15 -- -- --
X Ray Diffraction 2.3 2.64 5680 -- -- 0.157 -- -- --
X Ray Diffraction 2.64 3.3 5565 -- -- 0.147 -- -- --
X Ray Diffraction 3.3 10.0 5715 -- -- 0.141 -- -- --
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_singtor_nbd 0.164
p_mcbond_it 4.686
p_staggered_tor 14.8
p_bond_d 0.021
p_planar_tor 3.9
p_scangle_it 7.865
p_plane_restr 0.021
p_chiral_restr 0.241
p_angle_d 0.032
p_transverse_tor 30.6
p_planar_d 0.04
p_scbond_it 6.581
p_mcangle_it 5.353
p_multtor_nbd 0.147
p_xyhbond_nbd 0.137
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 3183
Nucleic Acid Atoms 0
Heterogen Atoms 140
Solvent Atoms 353

Software

Software
Software Name Purpose
Untitled data collection
XENGEN data reduction
FRODO model building
PROFFT refinement
XENGEN data scaling