4RGC

277K Crystal structure of Escherichia Coli dihydrofolate reductase


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1RX2 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP727717% PEG 400, 20 MM IMIDAZOLE PH 7.0, 125 MM MNCL2, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 277K
Crystal Properties
Matthews coefficientSolvent content
2.1342.37

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 34.299α = 90
b = 45.521β = 90
c = 98.711γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray277CCDADSC QUANTUM 3152005-04-25MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONSSRL BEAMLINE BL11-10.9SSRLBL11-1

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
11.0549.3698.30.04540.89.97178271782-3-3
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.051.0997.20.4585.29.16984

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTFREE R1RX21.0549.367170971709358998.30.1090.1090.1080.134RANDOM
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]
Coordinate Error
Structure Solution MethodRefinement High ResolutionRefinement Low Resolution
8211911570.3
RMS Deviations
KeyRefinement Restraint Deviation
s_from_restr_planes0.373
s_approx_iso_adps0.172
s_non_zero_chiral_vol0.096
s_zero_chiral_vol0.082
s_similar_adp_cmpnt0.049
s_angle_d0.031
s_anti_bump_dis_restr0.019
s_bond_d0.012
s_rigid_bond_adp_cmpnt0.005
s_similar_dist
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1270
Nucleic Acid Atoms
Solvent Atoms230
Heterogen Atoms82

Software

Software
Software NamePurpose
ADSCdata collection
SHELXmodel building
SHELXL-97refinement
HKL-2000data reduction
HKL-2000data scaling
SHELXphasing