3ZXK

Engineering the active site of a GH43 glycoside hydrolase generates a biotechnologically significant enzyme that displays both endo- xylanase and exo-arabinofuranosidase activity


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 3ZXJPDB ENTRY 3ZXJ

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
17.50.1 M HEPES PH 7.5 22.5 % (W/V) PEG4000 0.1 M NACL
Crystal Properties
Matthews coefficientSolvent content
2.0640.3

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 65.38α = 90
b = 52.97β = 101.69
c = 146.87γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC CCD2009-05-25MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPSAPS22-ID

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
11.4433.6899.20.0816.22.417761128.08
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)
11.441.4798.30.179.82.4

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-Work (Depositor)R-Work (DCC)R-Free (Depositor)R-Free (DCC)R-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB ENTRY 3ZXJ1.4433.68167521883598.310.168530.166490.170.207250.21RANDOM11.592
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]
0.040.03-0.07
RMS Deviations
KeyRefinement Restraint Deviation
r_sphericity_free30.333
r_dihedral_angle_2_deg26.74
r_dihedral_angle_4_deg12.273
r_dihedral_angle_3_deg11.424
r_sphericity_bonded8.034
r_dihedral_angle_1_deg6.888
r_rigid_bond_restr2.337
r_angle_refined_deg1.476
r_chiral_restr0.18
r_bond_refined_d0.011
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms8338
Nucleic Acid Atoms
Solvent Atoms1016
Heterogen Atoms104

Software

Software
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing