2AXY

Crystal Structure of KH1 domain of human Poly(C)-binding protein-2 with C-rich strand of human telomeric DNA

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.1	295	PEG 8000, Cacodylate, Acetate, pH 6.1, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.183	41.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 66.603	α = 90
b = 115.176	β = 90
c = 45.525	γ = 90

Symmetry
Space Group	P 21 21 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 4	KOHZU: Double Crystal Si(111)	2004-11-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.3.1	0.979594	ALS	8.3.1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	66.67	99.6	0.092	0.092	6.1	8		39246	2	2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.7	1.81	96.1		0.887	0.887	0.7	6

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	THROUGHOUT	1.7	50	39373	37143	1995	99.28	0.21541	0.21419	0.23759	RANDOM	11.586

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]
-0.26			0.4		-0.13

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.838
r_dihedral_angle_4_deg	23.085
r_dihedral_angle_3_deg	13.369
r_dihedral_angle_1_deg	4.81
r_scangle_it	3.729
r_scbond_it	2.609
r_angle_refined_deg	1.585
r_mcangle_it	1.522
r_mcbond_it	1.29
r_nbtor_refined	0.299
r_nbd_refined	0.202
r_xyhbond_nbd_refined	0.184
r_symmetry_vdw_refined	0.15
r_symmetry_hbond_refined	0.135
r_chiral_restr	0.109
r_bond_refined_d	0.013
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	2184
Nucleic Acid Atoms	444
Solvent Atoms	222
Heterogen Atoms

Software

Software
Software Name	Purpose
SCALA	data scaling
CNS	phasing
RESOLVE	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
DENZO	data reduction
CCP4	data scaling