1LY4

Analysis of quinazoline and PYRIDO[2,3D]PYRIMIDINE N9-C10 reversed bridge antifolates in complex with NADP+ and Pneumocystis carinii dihydrofolate reductase


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1CD2PDB ENTRY 1CD2

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION6298MES/KCl, PEG 2000, pH 6.0, VAPOR DIFFUSION, temperature 298K
Crystal Properties
Matthews coefficientSolvent content
2.0239.16

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 37.047α = 90
b = 43.128β = 94.6
c = 60.73γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray298IMAGE PLATERIGAKU RAXIS IVmirrors1998-02-09MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU RU2001.5418,1.5621,1.7321

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12.1894.2106928544-330.2
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
22.169.1

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (I)Cut-off Sigma (F)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB ENTRY 1CD22.1822854485440.19330.2
Temperature Factor Modeling
Anisotropic B[1][1]Anisotropic B[1][2]Anisotropic B[1][3]Anisotropic B[2][2]Anisotropic B[2][3]Anisotropic B[3][3]
RMS Deviations
KeyRefinement Restraint Deviation
p_angle_d0.063
p_bond_d0.02
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1678
Nucleic Acid Atoms
Solvent Atoms33
Heterogen Atoms73

Software

Software
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PROTEINmodel building
PROLSQrefinement
PROTEINphasing