2IO5 | pdb_00002io5

Crystal structure of the CIA- histone H3-H4 complex

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1TEY	PDB ENTRY 1TEY, PDB ENTRY 1KX3 chain A and B
experimental model	PDB	1KX3	PDB ENTRY 1TEY, PDB ENTRY 1KX3 chain A and B

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	293	0.1M HEPES, 0.05M cadmium sulfate hydrate, 1.0M sodium acetate tryhydrate, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 293.0K

Crystal Properties
Matthews coefficient	Solvent content
2.38	48.25

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 97.361	α = 90
b = 104.78	β = 90
c = 86.48	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	100	CCD	ADSC QUANTUM 210		2006-05-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE AR-NW12A	1.0000	Photon Factory	AR-NW12A

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	2.7	29.19	97.3	0.085	0.085	7.1	5.4	12485	12148		2.5	51.732

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	2.7	2.85	100		0.413	0.413	1.8	5.6	1779

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1TEY, PDB ENTRY 1KX3 chain A and B	2.7	29.19	12461	11529	604	97.36	0.245	0.24041	0.23761	0.24	0.29331	0.29	RANDOM	34.349

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]
-2.78			2.49		0.29

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.537
r_dihedral_angle_3_deg	20.878
r_dihedral_angle_4_deg	18.405
r_dihedral_angle_1_deg	6.786
r_scangle_it	1.844
r_angle_refined_deg	1.326
r_scbond_it	1.183
r_mcangle_it	1.012
r_mcbond_it	0.931
r_angle_other_deg	0.835
r_symmetry_vdw_other	0.242
r_nbd_refined	0.213
r_nbd_other	0.195
r_nbtor_refined	0.185
r_symmetry_vdw_refined	0.149
r_symmetry_hbond_refined	0.123
r_xyhbond_nbd_refined	0.097
r_mcbond_other	0.087
r_nbtor_other	0.085
r_chiral_restr	0.075
r_bond_refined_d	0.012
r_gen_planes_refined	0.004
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2474
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms

Software

Software
Software Name	Purpose
SCALA	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
ADSC	data collection
MOSFLM	data reduction
CCP4	data scaling
MOLREP	phasing