1Z32

Structure-function relationships in human salivary alpha-amylase: Role of aromatic residues


X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP9MPD 40%, pH 9.0, VAPOR DIFFUSION, HANGING DROP
Crystal Properties
Matthews coefficientSolvent content
2.1742.85

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 51.657α = 90
b = 73.513β = 90
c = 134.362γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 42002-04-01MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONCHESS BEAMLINE F10.91CHESSF1

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
11.642900.059293598135881320
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)
1.61.66940.2183

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-Factor (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT1smd1.619.845881358813314090.740.19190.17250.171440.1919RANDOM20.396
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]
-0.010.01
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_1_deg5.965
r_scangle_it2.481
r_scbond_it1.571
r_angle_refined_deg1.153
r_mcangle_it1.024
r_mcbond_it0.543
r_nbd_refined0.195
r_symmetry_vdw_refined0.157
r_symmetry_hbond_refined0.133
r_xyhbond_nbd_refined0.106
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_1_deg5.965
r_scangle_it2.481
r_scbond_it1.571
r_angle_refined_deg1.153
r_mcangle_it1.024
r_mcbond_it0.543
r_nbd_refined0.195
r_symmetry_vdw_refined0.157
r_symmetry_hbond_refined0.133
r_xyhbond_nbd_refined0.106
r_chiral_restr0.087
r_metal_ion_refined0.034
r_bond_refined_d0.008
r_gen_planes_refined0.005
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms3942
Nucleic Acid Atoms
Solvent Atoms339
Heterogen Atoms34

Software

Software
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing