1B2Y

STRUCTURE OF HUMAN PANCREATIC ALPHA-AMYLASE IN COMPLEX WITH THE CARBOHYDRATE INHIBITOR ACARBOSE


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1HNYPDB ENTRY 1HNY

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1860% 2-METHYLPENTAN-2,4 DIOL, pH 8.0
Crystal Properties
Matthews coefficientSolvent content
2.560

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 53.11α = 90
b = 75.1β = 90
c = 137.13γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray2931998-07-15MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODE

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
13.22591.80.1589.24.41010330
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)
3.23.2763.40.2865.79

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB ENTRY 1HNY3.2111895782696.50.1910.1910.217RANDOM9.5
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
x_scbond_it3
x_scangle_it2.9
x_mcangle_it2.2
x_mcbond_it2.1
x_angle_deg1.9
x_bond_d0.015
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
RMS Deviations
KeyRefinement Restraint Deviation
x_scbond_it3
x_scangle_it2.9
x_mcangle_it2.2
x_mcbond_it2.1
x_angle_deg1.9
x_bond_d0.015
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d
x_improper_angle_d_na
x_improper_angle_d_prot
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms3938
Nucleic Acid Atoms
Solvent Atoms105
Heterogen Atoms64

Software

Software
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement