3N17

Crystal stricture of E145Q/Y227F chitinase in complex with NAG from Bacillus cereus NCTU2


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 3N12PDB ENTRY 3N12

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP629150mM potassium phosphate monobasic, 20%(w/v) PEG 8000, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Crystal Properties
Matthews coefficientSolvent content
1.9737.57

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 48.644α = 90
b = 76.362β = 90
c = 76.911γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray110CCDADSC QUANTUM 3152008-04-09MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSRRC BEAMLINE BL13B11.00000NSRRCBL13B1

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
11.23097.20.0470.05643.35.687759
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)
1.21.2488.10.0560.1998.55.27859

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-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB ENTRY 3N121.22083269438797.240.17620.175620.1872RANDOM8.287
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]
-0.020.03-0.01
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg33.512
r_dihedral_angle_4_deg12.797
r_dihedral_angle_3_deg11.451
r_dihedral_angle_1_deg5.574
r_scangle_it1.694
r_scbond_it1.133
r_angle_refined_deg0.989
r_mcangle_it0.679
r_mcbond_it0.343
r_chiral_restr0.069
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg33.512
r_dihedral_angle_4_deg12.797
r_dihedral_angle_3_deg11.451
r_dihedral_angle_1_deg5.574
r_scangle_it1.694
r_scbond_it1.133
r_angle_refined_deg0.989
r_mcangle_it0.679
r_mcbond_it0.343
r_chiral_restr0.069
r_gen_planes_refined0.005
r_bond_refined_d0.004
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms2508
Nucleic Acid Atoms
Solvent Atoms291
Heterogen Atoms29

Software

Software
Software NamePurpose
HKL-2000data collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling