3IOT

Huntingtin amino-terminal region with 17 Gln residues - crystal C92-b

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		278	12% PEG 4000, 200 mM Zn acetate, 200 mM Sodium acetate, 100 mM Sodium Cacodylate pH 6.5-7.4, VAPOR DIFFUSION, HANGING DROP, temperature 278K

Crystal Properties
Matthews coefficient	Solvent content
3.97	69.03

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 163.25	α = 90
b = 101.36	β = 91.83
c = 137.03	γ = 90

Symmetry
Space Group	C 1 2 1

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 315	LN2 cooled first crystal, sagitally focusing 2nd crystal, Rosenbaum-Rock vertical focusing mirror, beam defining slits		M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-ID	0.9800	APS	19-ID

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	2.71	50		0.09		3		40594

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 3IOR	3.5	37.36	18671	975	69.22	0.24957	0.24722	0.29516	RANDOM	56.578

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]
0.87		-0.46	0.84		-1.75

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.158
r_dihedral_angle_3_deg	19.705
r_dihedral_angle_4_deg	15.103
r_dihedral_angle_1_deg	3.927
r_angle_refined_deg	1.149
r_mcangle_it	0.577
r_scangle_it	0.522
r_rigid_bond_restr	0.369
r_scbond_it	0.353
r_mcbond_it	0.326
r_chiral_restr	0.075
r_bond_refined_d	0.009
r_gen_planes_refined	0.005
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	9177
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	18

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing