2AR8

The structure of tryptophan 7-halogenase (PrnA)suggests a mechanism for regioselective chlorination


X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP6.52938% PEG20000, 0.1M Mes pH6.5, 20mM 7-chlorotryptophan, VAPOR DIFFUSION, SITTING DROP, temperature 293K
Crystal Properties
Matthews coefficientSolvent content
2.652.6

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 67.128α = 90
b = 67.128β = 90
c = 275.702γ = 90
Symmetry
Space GroupP 43 21 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 42003-11-19MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONESRF BEAMLINE ID14-10.933ESRFID14-1

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
12.254.499.70.1150.1154.514.1335473.11.829.25
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)
12.22.3298.798.70.3750.3751.813.54744

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)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 REPLACEMENTTHROUGHOUT2AQJ2.254.433129167199.620.1740.1730.1720.217RANDOM25.29
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]
0.330.33-0.67
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg32.052
r_dihedral_angle_4_deg18.885
r_dihedral_angle_3_deg15.136
r_dihedral_angle_1_deg6.27
r_scangle_it3.272
r_scbond_it2.073
r_angle_refined_deg1.458
r_mcangle_it1.358
r_mcbond_it0.836
r_nbtor_refined0.316
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg32.052
r_dihedral_angle_4_deg18.885
r_dihedral_angle_3_deg15.136
r_dihedral_angle_1_deg6.27
r_scangle_it3.272
r_scbond_it2.073
r_angle_refined_deg1.458
r_mcangle_it1.358
r_mcbond_it0.836
r_nbtor_refined0.316
r_symmetry_vdw_refined0.216
r_nbd_refined0.211
r_xyhbond_nbd_refined0.148
r_symmetry_hbond_refined0.147
r_chiral_restr0.095
r_bond_refined_d0.013
r_gen_planes_refined0.006
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4162
Nucleic Acid Atoms
Solvent Atoms226
Heterogen Atoms70

Software

Software
Software NamePurpose
SCALAdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
MOSFLMdata reduction
CCP4data scaling
MOLREPphasing