2QV4

Human pancreatic alpha-amylase complexed with nitrite and acarbose


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP7.530060% 2-methylpentane-2,4-diol, 100 mM cacodylate, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 300K
Crystal Properties
Matthews coefficientSolvent content
2.0439.77

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 51.859α = 90
b = 67.723β = 90
c = 130.099γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100IMAGE PLATEMAR scanner 345 mm platemirrors2004-08-29MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU RU3001.5418

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
11.973097.60.0442.54.532323
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)
11.97294.50.17144

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB ENTRY 1HNY1.9720.333232397.50.17620.2241RANDOM- 5% OF TOTAL DATA21.8723
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
c_dihedral_angle_d24.00263
c_angle_deg1.50542
c_improper_angle_d0.87782
c_bond_d0.00754
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms3946
Nucleic Acid Atoms
Solvent Atoms411
Heterogen Atoms73

Software

Software
Software NamePurpose
CNSrefinement
MAR345dtbdata collection
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing