1E26

Design, Synthesis and X-ray Crystal Structure of a Potent Dual Inhibitor of Thymidylate Synthase and Dihydrofolate Reductase as an Antitumor Agent.


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 2CD2 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1MICROBATCH6PROTEIN SOLUTION: WASHED AND CONCENTRATED 4 TUBES PCDHFR USING A CENTRICON 10 50 MM MES, 100MM KCL, B-NADPH, PH 6.0, A280/340 RATIO OF 24. WASHED WITH 50MM MES, 100MM KCL, PH 6.0, WASHED WITH 50MM MES, 100MM KCL, PH 6.0 TO A CONCENTRATION OF 6.5 MG/ML. RESERVOIR SOLUTION: 50% PEG2000MME, 50MM MES, 100MM, PH 6.0 SET UP MICROBATCH POLYTHERMAL GRADIENT EXPERIMENTS IN MICROPETS. DROPS WERE COMPOSED OF: 2.5 MICROLITERS PROTEIN SOLUTION 2.0 MICROLITERS PROTEIN SOLUTION 0.5 MICROLITERS 50MM MES, 100MM KCL, PH 6.0. MICROPETS WERE LEFT TO EQUILIBRATE ON THE POLYTHERMAL GRADIENT.
Crystal Properties
Matthews coefficientSolvent content
1.9748

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 37.332α = 90
b = 43.231β = 94.59
c = 61.241γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray293IMAGE PLATERIGAKU RAXIS IIC1999-01-15MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU RU200HB

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (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
1210099.40.0542.6119192

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT2CD22100132970.21850.21850.2968
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
c_angle_deg1.5
c_bond_d0.008
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d
RMS Deviations
KeyRefinement Restraint Deviation
c_angle_deg1.5
c_bond_d0.008
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d
c_improper_angle_d_na
c_improper_angle_d_prot
c_mcbond_it
c_mcangle_it
c_scbond_it
c_scangle_it
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1678
Nucleic Acid Atoms
Solvent Atoms101
Heterogen Atoms79

Software

Software
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling