3IU6

Crystal structure of the sixth bromodomain of human poly-bromodomain containing protein 1 (PB1)

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2NXB	Ensemble of PDB entries 2NXB, 2OO1, 2OSS, 2OUO, 2RFJ, 3DAI, 3D7C, 3DWY
experimental model	PDB	2OO1	Ensemble of PDB entries 2NXB, 2OO1, 2OSS, 2OUO, 2RFJ, 3DAI, 3D7C, 3DWY
experimental model	PDB	2OSS	Ensemble of PDB entries 2NXB, 2OO1, 2OSS, 2OUO, 2RFJ, 3DAI, 3D7C, 3DWY
experimental model	PDB	2OUO	Ensemble of PDB entries 2NXB, 2OO1, 2OSS, 2OUO, 2RFJ, 3DAI, 3D7C, 3DWY
experimental model	PDB	2RFJ	Ensemble of PDB entries 2NXB, 2OO1, 2OSS, 2OUO, 2RFJ, 3DAI, 3D7C, 3DWY
experimental model	PDB	3DAI	Ensemble of PDB entries 2NXB, 2OO1, 2OSS, 2OUO, 2RFJ, 3DAI, 3D7C, 3DWY
experimental model	PDB	3D7C	Ensemble of PDB entries 2NXB, 2OO1, 2OSS, 2OUO, 2RFJ, 3DAI, 3D7C, 3DWY
experimental model	PDB	3DWY	Ensemble of PDB entries 2NXB, 2OO1, 2OSS, 2OUO, 2RFJ, 3DAI, 3D7C, 3DWY

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	277	0.01M ZnCl2, 0.1M Tris-HCl pH 8.0, 20% PEG 6000, 10% Ethylene glycol, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.1	60.36

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 66.4	α = 90
b = 66.4	β = 90
c = 85.43	γ = 120

Symmetry
Space Group	P 32 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 4		2009-06-29	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I03	0.9763	Diamond	I03

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	1.79	33.2	99.4	0.136	0.136	11.2	8.4	21260	21132			19.4

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	1.79	1.88	96.4		0.87	0.87	2	6.4	2932

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	Ensemble of PDB entries 2NXB, 2OO1, 2OSS, 2OUO, 2RFJ, 3DAI, 3D7C, 3DWY	1.79	33.2	21030	20982	1074	99.77	0.167	0.167	0.165	0.202	RANDOM	10.665

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]
-0.34	-0.17		-0.34		0.51

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.928
r_dihedral_angle_4_deg	16.289
r_dihedral_angle_3_deg	12.704
r_scangle_it	8.373
r_scbond_it	6.438
r_dihedral_angle_1_deg	4.514
r_mcangle_it	3.947
r_angle_other_deg	2.777
r_mcbond_it	2.658
r_angle_refined_deg	1.468
r_mcbond_other	0.924
r_chiral_restr	0.094
r_bond_refined_d	0.016
r_gen_planes_refined	0.006
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1185
Nucleic Acid Atoms
Solvent Atoms	172
Heterogen Atoms	13

Software

Software
Software Name	Purpose
SCALA	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
CrystalClear	data collection
MOSFLM	data reduction