4ACX

Aminoimidazoles as BACE-1 Inhibitors. X-RAY CRYSTAL STRUCTURE OF BETA SECRETASE COMPLEXED WITH COMPOUND 23


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelOtherPREVIOUSLY DETERMINED BACE-1 STRUCTURE

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1511% PEG6K, 90 MM NAAC PH 5.0, 18 MM TRIS PH 8.5, 135 MM NACL
Crystal Properties
Matthews coefficientSolvent content
2.0741

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 48.009α = 90
b = 76.326β = 90
c = 104.73γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100IMAGE PLATEMAR scanner 345 mm plateMIRRORS2008-02-19MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU RU300

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
1243.693.60.110.13.125609122.45
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)
122.0599.60.42.73.1

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPREVIOUSLY DETERMINED BACE-1 STRUCTURE243.6424905125693.270.20090.19890.2384RANDOM25.41
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]
-6.1676-0.25856.4261
RMS Deviations
KeyRefinement Restraint Deviation
t_other_torsion17.17
t_omega_torsion2.79
t_angle_deg1.02
t_bond_d0.007
t_dihedral_angle_d
t_incorr_chiral_ct
t_pseud_angle
t_trig_c_planes
t_gen_planes
t_it
RMS Deviations
KeyRefinement Restraint Deviation
t_other_torsion17.17
t_omega_torsion2.79
t_angle_deg1.02
t_bond_d0.007
t_dihedral_angle_d
t_incorr_chiral_ct
t_pseud_angle
t_trig_c_planes
t_gen_planes
t_it
t_nbd
t_improper_torsion
t_chiral_improper_torsion
t_sum_occupancies
t_utility_distance
t_utility_angle
t_utility_torsion
t_ideal_dist_contact
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms2918
Nucleic Acid Atoms
Solvent Atoms263
Heterogen Atoms37

Software

Software
Software NamePurpose
BUSTERrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing