3A47

Crystal structure of isomaltase from Saccharomyces cerevisiae


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP7.328819% PEG 3350, 0.05M HEPES, 0.2 M lithium acetate, pH 7.3, VAPOR DIFFUSION, HANGING DROP, temperature 288K
Crystal Properties
Matthews coefficientSolvent content
2.4950.63

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 95.709α = 90
b = 115.674β = 91.33
c = 61.837γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 4r2007-11-17MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONPHOTON FACTORY BEAMLINE BL-6A0.9780Photon FactoryBL-6A

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
11.595097.10.03539.34.3892498666122
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)
1.591.66950.0426.30.0428842

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)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 REPLACEMENTTHROUGHOUTPDB entry 1uok1.5926.2428508982315434196.740.175960.175820.17470.1973RANDOM10.282
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
r_dihedral_angle_2_deg35.218
r_dihedral_angle_4_deg15.309
r_dihedral_angle_3_deg11.63
r_dihedral_angle_1_deg5.922
r_scangle_it2.549
r_scbond_it1.669
r_angle_refined_deg1.166
r_mcangle_it0.946
r_mcbond_it0.564
r_nbtor_refined0.313
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg35.218
r_dihedral_angle_4_deg15.309
r_dihedral_angle_3_deg11.63
r_dihedral_angle_1_deg5.922
r_scangle_it2.549
r_scbond_it1.669
r_angle_refined_deg1.166
r_mcangle_it0.946
r_mcbond_it0.564
r_nbtor_refined0.313
r_nbd_refined0.198
r_symmetry_vdw_refined0.146
r_metal_ion_refined0.1
r_chiral_restr0.087
r_xyhbond_nbd_refined0.086
r_symmetry_hbond_refined0.07
r_bond_refined_d0.009
r_gen_planes_refined0.005
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4835
Nucleic Acid Atoms
Solvent Atoms494
Heterogen Atoms1

Software

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