2OHR

X-ray crystal structure of beta secretase complexed with compound 6a

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.6	293	20-22.5% (w/v) PEG 5000 monomethylether (MME), 200 mM sodium citrate (pH 6.6), 200 mM ammonium iodide, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.83	56.53

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 101.03	α = 90
b = 101.03	β = 90
c = 172.33	γ = 120

Symmetry
Space Group	P 61 2 2

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		2003-09-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-3	0.93100	ESRF	ID14-3

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	2.25	50.52	98.7	0.105			24903	24903

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Number Reflections (All)	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 1W50	2.25	50.52	0.173	24903	24903	1271	98.11	0.173	0.17	0.214	RANDOM	25.206

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]
-1.32	-0.66		-1.32		1.97

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.715
r_dihedral_angle_4_deg	16.602
r_dihedral_angle_3_deg	14.924
r_dihedral_angle_1_deg	7.085
r_angle_refined_deg	1.424
r_angle_other_deg	0.876
r_symmetry_vdw_other	0.238
r_xyhbond_nbd_refined	0.229
r_symmetry_hbond_refined	0.229
r_nbd_other	0.21
r_nbd_refined	0.201
r_nbtor_refined	0.186
r_symmetry_vdw_refined	0.172
r_scangle_it	0.11
r_mcangle_it	0.093
r_scbond_it	0.091
r_nbtor_other	0.09
r_chiral_restr	0.085
r_mcbond_it	0.07
r_mcbond_other	0.031
r_bond_refined_d	0.013
r_gen_planes_refined	0.005
r_bond_other_d	0.002
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2966
Nucleic Acid Atoms
Solvent Atoms	279
Heterogen Atoms	33

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
ProDC	data collection
MOSFLM	data reduction
CCP4	data scaling
C-SEARCH	phasing