1GS9

Apolipoprotein E4, 22k domain

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1BZ4	PDB ENTRY 1BZ4

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5.6		50MM NA-CACODYLATE, PH 5.6, 20-25% PEG 400, 1% 2-ME, RT, CRYSTALLIZED FROM FULL LENGTH APOE4 CONSTRUCT (299 RESIDUES). PROTEOLYTIC CLEAVAGE IN CRYSTALLIZATION DROP TO 22K FRAGMENT. NEW, THIRD ORTHOGONAL CRYSTAL FORM OF APOE (ORTHO-3)

Crystal Properties
Matthews coefficient	Solvent content
2.56	49.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 45.511	α = 90
b = 53.089	β = 90
c = 73.372	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	125	CCD	ADSC CCD	MIRRORS	1999-04-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.2		ALS	5.0.2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	1.7	20.9	99.97	0.035	12.1	7.7		20168

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1BZ4	1.7	20.9	19116	1045	100	0.219	0.218	0.247	RANDOM	30.25

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]
-0.4			-1		1.4

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	16.592
r_dihedral_angle_1_deg	4.161
r_scangle_it	4.111
r_scbond_it	2.507
r_mcangle_it	2.354
r_angle_refined_deg	1.794
r_mcbond_it	1.237
r_symmetry_vdw_refined	0.257
r_nbd_refined	0.232
r_symmetry_hbond_refined	0.232
r_xyhbond_nbd_refined	0.222
r_chiral_restr	0.117
r_bond_refined_d	0.016
r_gen_planes_refined	0.008
r_bond_other_d
r_angle_other_deg
r_dihedral_angle_2_deg
r_dihedral_angle_4_deg
r_gen_planes_other
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1179
Nucleic Acid Atoms
Solvent Atoms	223
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
EPMR	phasing