1RA3

DIHYDROFOLATE REDUCTASE COMPLEXED WITH METHOTREXATE AND NICOTINAMIDE ADENINE DINUCLEOTIDE PHOSPHATE (OXIDIZED FORM)


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1RH3PDB ENTRY 1RH3

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
16pH 6.0
Crystal Properties
Matthews coefficientSolvent content
2.3146.8

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 74.86α = 90
b = 60.21β = 107.91
c = 38.94γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray298AREA DETECTORXUONG-HAMLIN MULTIWIRE1995-02-09M
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU RUH2R

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Sym 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
11.8100950.042.513431

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB ENTRY 1RH31.8201343113431950.17
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
t_dihedral_angle_d23.9
t_it6.2
t_angle_deg2.9
t_nbd0.032
t_bond_d0.023
t_trig_c_planes0.018
t_gen_planes0.008
t_incorr_chiral_ct
t_pseud_angle
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1268
Nucleic Acid Atoms
Solvent Atoms150
Heterogen Atoms70

Software

Software
Software NamePurpose
MERLOTphasing
TNTrefinement
UCSDdata reduction
UCSDdata scaling