3M4T

Crystal structure of the BTB domain from Kaiso/ZBTB33, form I

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.3	295	0.25 M sodium sulfate, 0.1 M sodium acetate pH 4.3, 13% (w/v) PEG 3350, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.75	55.25

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 117.208	α = 90
b = 117.208	β = 90
c = 38.405	γ = 120

Symmetry
Space Group	P 62 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 4r	mirrors	2004-02-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X8C	1.10	NSLS	X8C

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	2.05	29.3	98.6	0.065	51.82	20.95		10103		-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.05	2.12	97.7		0.347	8.43		980

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	Single chain poly-alanine model of PDB code 1BUO, except where residues were identical between Kaiso and 1BUO, and all loops and turns were deleted	2.05	29.3	9612	488	98.62	0.19314	0.19074	0.24181	RANDOM	28.704

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]
-0.5	-0.25		-0.5		0.75

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.622
r_dihedral_angle_4_deg	15.118
r_dihedral_angle_3_deg	14.117
r_dihedral_angle_1_deg	6.158
r_scangle_it	5.155
r_scbond_it	3.145
r_mcangle_it	1.993
r_angle_refined_deg	1.532
r_mcbond_it	1.16
r_nbtor_refined	0.313
r_nbd_refined	0.226
r_symmetry_vdw_refined	0.196
r_symmetry_hbond_refined	0.173
r_xyhbond_nbd_refined	0.158
r_chiral_restr	0.108
r_bond_refined_d	0.017
r_gen_planes_refined	0.006
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_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	911
Nucleic Acid Atoms
Solvent Atoms	77
Heterogen Atoms	2

Software

Software
Software Name	Purpose
ADSC	data collection
PHASER	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling