2OHM

X-ray crystal structure of beta secretase complexed with N~3~-benzylpyridine-2,3-diamine

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
2.81	56.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 101.172	α = 90
b = 101.172	β = 90
c = 170.924	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	ADSC QUANTUM 4		2002-12-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX14.2	0.97800	SRS	PX14.2

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	2.7	42.44	96.6	0.139			14335	14335

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 1W50	2.7	42.44	14335	14335	729	96.59	0.214	0.214	0.211	0.279	RANDOM	37.579

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]
-0.98	-0.49		-0.98		1.48

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.681
r_dihedral_angle_3_deg	17.715
r_dihedral_angle_4_deg	15.095
r_dihedral_angle_1_deg	7.224
r_angle_refined_deg	1.43
r_angle_other_deg	0.868
r_nbd_refined	0.213
r_symmetry_vdw_other	0.211
r_nbd_other	0.204
r_nbtor_refined	0.193
r_symmetry_vdw_refined	0.188
r_symmetry_hbond_refined	0.161
r_xyhbond_nbd_refined	0.126
r_nbtor_other	0.09
r_scangle_it	0.09
r_chiral_restr	0.076
r_mcangle_it	0.074
r_scbond_it	0.069
r_mcbond_it	0.047
r_mcbond_other	0.014
r_bond_refined_d	0.012
r_xyhbond_nbd_other	0.012
r_gen_planes_refined	0.004
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2966
Nucleic Acid Atoms
Solvent Atoms	75
Heterogen Atoms	21

Software

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