1OA8

AXH domain of human spinocerebellar ataxin-1

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7	290	PROTEIN WAS CRYSTALLIZED FROM 0.1M TRIS/HCL, PH 7.0, 0.2M AMMONIUM SULPHATE, 5 MM DTT, 15% PEG 4000, 20% GLYCEROL, AT 290K

Crystal Properties
Matthews coefficient	Solvent content
2.37	40

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 48.783	α = 90
b = 82.441	β = 90
c = 137.781	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	CCD	ADSC CCD	MIRRORS	2002-11-15	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX14.2	0.960,0.97916,0.97966	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	1.7	70.71	99.6	0.065	5.9	4.3		62044

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	1.7	1.79	98.1		0.416	1.7	3.4

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	1.7	70.71	58574	3125	99.5	0.21	0.252	RANDOM	25.8

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]
1.39			-1.09		-0.3

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.668
r_scangle_it	5.64
r_scbond_it	3.333
r_mcangle_it	2.253
r_angle_refined_deg	1.78
r_mcbond_it	1.292
r_symmetry_hbond_refined	0.239
r_symmetry_vdw_refined	0.233
r_nbd_refined	0.225
r_metal_ion_refined	0.176
r_xyhbond_nbd_refined	0.166
r_chiral_restr	0.123
r_bond_refined_d	0.02
r_gen_planes_refined	0.009
r_bond_other_d
r_angle_other_deg
r_dihedral_angle_2_deg
r_dihedral_angle_3_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_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	3934
Nucleic Acid Atoms
Solvent Atoms	378
Heterogen Atoms	3

Software

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