1Y66

Dioxane contributes to the altered conformation and oligomerization state of a designed engrailed homeodomain variant

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5.5	293	dioxane, sodium citrate, MES, PEG 400, Cadmium Chloride, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.34	47.1

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 50.712	α = 90
b = 52.646	β = 90
c = 82.182	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	100	IMAGE PLATE	RIGAKU RAXIS IV	mirrors	2003-12-21	M	SINGLE WAVELENGTH
2	1	100	CCD	ADSC QUANTUM 315	monochrometer	2004-06-03

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU300	1.5418
2	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.8265	SSRL	BL9-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.65						27056

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	SAD	THROUGHOUT	1.65	24.3	27060	25624	1391	99.81	0.18951	0.18951	0.18745	0.22786	RANDOM	28.118

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]
1.01			-0.1		-0.91

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.853
r_dihedral_angle_4_deg	20.403
r_dihedral_angle_3_deg	15.45
r_sphericity_free	6.602
r_scangle_it	6.054
r_sphericity_bonded	5.669
r_scbond_it	4.097
r_dihedral_angle_1_deg	3.927
r_mcangle_it	2.805
r_rigid_bond_restr	2.555
r_mcbond_it	1.79
r_angle_refined_deg	1.527
r_nbtor_refined	0.32
r_symmetry_vdw_refined	0.254
r_nbd_refined	0.243
r_xyhbond_nbd_refined	0.182
r_symmetry_hbond_refined	0.138
r_chiral_restr	0.094
r_bond_refined_d	0.017
r_gen_planes_refined	0.008
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_mcbond_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1606
Nucleic Acid Atoms
Solvent Atoms	173
Heterogen Atoms	62

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
MLPHARE	phasing