4ERP

Crystal structure of a gemcitabine-diphosphate inhibited E. coli class Ia ribonucleotide reductase complex


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1RLRPDB ENTRY 1RLR and 1PFR
experimental modelPDB 1PFRPDB ENTRY 1RLR and 1PFR

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP7.5298Precipitant solution: 25% PEG 3350, 0.1 M HEPES pH 7.5, 0.2 M ammonium acetate, 5% glycerol mixed 2:1 with protein and streak seeded from crystals grown under similar conditions. , VAPOR DIFFUSION, HANGING DROP, temperature 298K
Crystal Properties
Matthews coefficientSolvent content
3.9668.96

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 128.669α = 90
b = 398.906β = 90
c = 319.437γ = 90
Symmetry
Space GroupC 2 2 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 2102010-03-11MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONCHESS BEAMLINE A10.9769CHESSA1

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
14.455090.75082046069
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R-Sym I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
14.454.6170.60.3572.223528

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-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTR-freePDB ENTRY 1RLR and 1PFR4.45505082041827213082.30.2330.267Random
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_mcangle_it8.8
c_mcbond_it5.7
c_angle_d1.012
c_bond_d0.008
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms35061
Nucleic Acid Atoms
Solvent Atoms8
Heterogen Atoms136

Software

Software
Software NamePurpose
ADSCdata collection
PHASERphasing
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling