3H97

Structure of a mutant methionyl-tRNA synthetase with modified specificity


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP7.1279Ammonium citrate, pH 7.1, VAPOR DIFFUSION, SITTING DROP, temperature 279K
Crystal Properties
Matthews coefficientSolvent content
2.3347.21

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 78.203α = 90
b = 45.264β = 107.28
c = 85.992γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 42007-09-13MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONESRF BEAMLINE ID14-20.933ESRFID14-2

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (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
11.75093.40.0230.02218.82.545954159541-315.76
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)R-Sym I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.71.896.10.0420.0381.86

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB entry 1QQT1.7505954159541361593.50.1590.1590.18211.017
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]
-0.303-0.199-1.2411.545
RMS Deviations
KeyRefinement Restraint Deviation
c_angle_deg1.209
c_bond_d0.005
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4368
Nucleic Acid Atoms
Solvent Atoms983
Heterogen Atoms27

Software

Software
Software NamePurpose
XSCALEdata processing
CNSrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
XDSdata reduction
XSCALEdata scaling
CNSphasing