1EDQ

CRYSTAL STRUCTURE OF CHITINASE A FROM S. MARCESCENS AT 1.55 ANGSTROMS


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1CTN 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP7.22930.75 M Citrate-Na pH 7.2, 20% (v/v) methanol, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Crystal Properties
Matthews coefficientSolvent content
3.363

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 199.497α = 90
b = 131.825β = 90
c = 59.368γ = 90
Symmetry
Space GroupC 2 2 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100IMAGE PLATEMARRESEARCH1999-04-04MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONEMBL/DESY, HAMBURG BEAMLINE X11EMBL/DESY, HAMBURGX11

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
11.551099.80.03227.8511285711285719.6
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)
1.551.611000.2166.84.311176

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 (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENT1CTN1.5510112857112857564099.80.1880.1880.1870.215RANDOM24.2
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]
RMS Deviations
KeyRefinement Restraint Deviation
p_transverse_tor25.2
p_staggered_tor11.9
torsion_deg11.9
p_planar_tor6.5
p_scangle_it2.27
p_mcangle_it1.57
p_scbond_it1.5
p_angle_deg1.2
p_mcbond_it1.09
p_multtor_nbd0.241
RMS Deviations
KeyRefinement Restraint Deviation
p_transverse_tor25.2
p_staggered_tor11.9
torsion_deg11.9
p_planar_tor6.5
p_scangle_it2.27
p_mcangle_it1.57
p_scbond_it1.5
p_angle_deg1.2
p_mcbond_it1.09
p_multtor_nbd0.241
contacts_van_der_waals_d0.24
p_xyhbond_nbd0.196
p_singtor_nbd0.171
p_chiral_restr0.093
p_planar_d0.03
p_angle_d0.023
p_bond_d0.01
p_plane_restr0.01
peptide_bond_planarity_d0.01
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4220
Nucleic Acid Atoms
Solvent Atoms909
Heterogen Atoms

Software

Software
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
REFMACrefinement