4HBX

Crystal Structure of the first bromodomain of human BRD4 in complex with a quinazolin ligand

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2OSS

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	277	0.2M KSCN, 0.1M BTProp pH 7.5, 20% PEG3350, 10% EtGly, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.13	42.12

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 43.48	α = 90
b = 48.37	β = 90
c = 61.03	γ = 90

Symmetry
Space Group	P 21 21 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	IMAGE PLATE	RIGAKU RAXIS IV		2012-02-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU FR-E SUPERBRIGHT	1.5418

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	1.62	37.91	99.9	0.068	0.068	11.6	4.4	16968	16951			20.6

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	1.62	1.71	99.8		0.572	0.572	1.3	3.9	2415

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	2OSS	1.62	37.91	16929	16895	854	99.8	0.1791	0.1791	0.1775	0.2096	RANDOM	21.9613

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			0.22		-0.56

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.73
r_dihedral_angle_4_deg	19.923
r_dihedral_angle_3_deg	13.517
r_dihedral_angle_1_deg	5.57
r_angle_refined_deg	1.594
r_angle_other_deg	0.981
r_chiral_restr	0.095
r_bond_refined_d	0.015
r_gen_planes_refined	0.009
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.73
r_dihedral_angle_4_deg	19.923
r_dihedral_angle_3_deg	13.517
r_dihedral_angle_1_deg	5.57
r_angle_refined_deg	1.594
r_angle_other_deg	0.981
r_chiral_restr	0.095
r_bond_refined_d	0.015
r_gen_planes_refined	0.009
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1061
Nucleic Acid Atoms
Solvent Atoms	157
Heterogen Atoms	20

Software

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

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.