3MS8

Enzyme-Substrate interactions of IXT6, the intracellular xylanase of G. stearothermophilus.


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP6.52930.1M sodium cacodylate pH=6.5, 1.9M soduim acetate, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Crystal Properties
Matthews coefficientSolvent content
3.4764.52

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 169.389α = 90
b = 80.081β = 91.5
c = 79.026γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 4r2002-12-05MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONESRF BEAMLINE ID14-40.939ESRFID14-4

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (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
11.719.89970.0515.32.8831938011096015.320.4
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)
11.71.7388.50.1614.71.765019

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 DIFFRACTIONIts 2Q8X only one point mutation, using its phases doing rigid and annealingTHROUGHOUTPDB ENTRY 2Q8X1.719.89107077107077538492.90.1960.209RANDOM30.1
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]
-13.02-2.0217.81-4.79
RMS Deviations
KeyRefinement Restraint Deviation
DIHEDRAL ANGLES22.1
BOND ANGLES1.3
IMPROPER ANGLES0.8
BOND LENGTHS0.005
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms5385
Nucleic Acid Atoms
Solvent Atoms443
Heterogen Atoms38

Software

Software
Software NamePurpose
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling
CNSphasing