3H91

Crystal structure of the complex of human chromobox homolog 2 (CBX2) and H3K27 peptide

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	298	30% PEG3350, 0.1 M Tris, pH8.5, 0.2M NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.49	50.62

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 58.145	α = 90
b = 84.013	β = 90
c = 65.499	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray					2009-01-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	CLSI BEAMLINE 08ID-1	0.97934	CLSI	08ID-1

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	1.2	50	93.8	0.046	38.995	8.1		26030

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)
	1.2	1.24	61.7		0.695		3.3

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-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1.5	19.99	24729	1294	99.8	0.21015	0.20945	0.22299	RANDOM	16.163

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]
0.57			-0.6		0.03

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	20.634
r_dihedral_angle_4_deg	14.836
r_dihedral_angle_3_deg	12.001
r_dihedral_angle_1_deg	6.588
r_scangle_it	3.418
r_scbond_it	2.443
r_mcangle_it	1.673
r_angle_refined_deg	1.461
r_mcbond_it	1.089
r_symmetry_vdw_refined	0.335
r_nbtor_refined	0.309
r_nbd_refined	0.19
r_xyhbond_nbd_refined	0.148
r_chiral_restr	0.13
r_symmetry_hbond_refined	0.126
r_bond_refined_d	0.012
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	1014
Nucleic Acid Atoms
Solvent Atoms	152
Heterogen Atoms

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction