Experiment: 4WIV

Crystal Structure of the first bromodomain of human BRD4 in complex with a novel inhibitor UMB32 (N-TERT-BUTYL-2-[4-(3,5-DIMETHYL-1,2-OXAZOL-4-YL) PHENYL]IMIDAZO[1,2-A]PYRAZIN-3-AMINE)

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3MXF

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.4	295	Crystals of inhibitor-free BRD4-BD1 were first obtained in a drop with equal volumes of BD1 at 12 mg/ml and a precipitant solution containing 100mM sodium nitrate, 5% ethylene glycol, and 18% (w/v) PEG3350, as precipitant. Rod-like crystals were typically grown in 10 days reaching a maximal size of 0.05x0.05x0.4 mm3. Then, native crystals were transferred and soaked in 1 mM UMB32 in the same crystallization buffer for 7 days.

Crystal Properties
Matthews coefficient	Solvent content
2.2	44.6

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 43.562	α = 90
b = 49.21	β = 90
c = 60.991	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	CCD	ADSC QUANTUM 315		2014-02-14	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 24-ID-E	0.9792	APS	24-ID-E

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.56	35.45	99.58	9.88	3.9		19177			14.04

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.56	1.616	100		1.62	3.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	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	FREE R-VALUE	3MXF	1.56	35.449	1.34	19175	986	99.57	0.1714	0.1698	0.171	0.2013	0.2038	Random selectio	19.6

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	11.847
f_angle_d	1.296
f_chiral_restr	0.038
f_bond_d	0.007
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1047
Nucleic Acid Atoms
Solvent Atoms	154
Heterogen Atoms	47

Software

Software
Software Name	Purpose
PHENIX	refinement