3EXO

Crystal structure of BACE1 bound to inhibitor

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	293	1.5M Lithium Sulfate, 0.1M HEPES pH 7.5; crystals were soaked in 1.5M Lithium Sulfate, 0.1M Na Citrate, pH 5.0, 0.5mM inhibitor, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.78	55.81

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 104.433	α = 90
b = 127.923	β = 90
c = 76.671	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	MAR CCD 165 mm		2007-11-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 17-BM	1.0000	APS	17-BM

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	2.1	50	98.9	0.105	16.347	4.9		30130

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.1	2.18	99.9		0.471		5	3013

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION		THROUGHOUT	2.1	32.88	28851	1497	95.06	0.232	0.229	0.295	RANDOM	19.184

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]
-0.02			0.08		-0.06

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.35
r_dihedral_angle_4_deg	17.38
r_dihedral_angle_3_deg	14.981
r_dihedral_angle_1_deg	6.584
r_scangle_it	2.95
r_scbond_it	1.935
r_angle_refined_deg	1.482
r_mcangle_it	1.275
r_mcbond_it	0.781
r_nbtor_refined	0.309
r_symmetry_hbond_refined	0.204
r_nbd_refined	0.199
r_symmetry_vdw_refined	0.174
r_xyhbond_nbd_refined	0.158
r_chiral_restr	0.097
r_bond_refined_d	0.013
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2926
Nucleic Acid Atoms
Solvent Atoms	417
Heterogen Atoms	46

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
StructureStudio	data collection
MOLREP	phasing