Experiment: 4F3L

Crystal Structure of the Heterodimeric CLOCK:BMAL1 Transcriptional Activator Complex

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	8	293	100 mM Hepes pH 8.0, 6% PEG 3350 and 75 mM NaF., VAPOR DIFFUSION, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.43	49.38

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 67.242	α = 90
b = 71.955	β = 90
c = 173.306	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	77	CCD	ADSC QUANTUM 315		2011-06-15	M	SINGLE WAVELENGTH
2	1	x-ray	77	CCD	ADSC QUANTUM 315r		2011-05-10	M	SINGLE WAVELENGTH
3	1	x-ray	77	CCD	ADSC QUANTUM 315		2011-04-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-ID		APS	19-ID
2	SYNCHROTRON	ALS BEAMLINE 8.2.1		ALS	8.2.1
3	SYNCHROTRON	APS BEAMLINE 19-ID		APS	19-ID

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
1,2,3	2.268	50	99.5				39307

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	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)	Mean Isotropic B
X-RAY DIFFRACTION	SAD	2.268	37.117	0.06	39307	36738	1849	92.26	0.186	0.1843	0.1917	0.2171	0.2248

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]
-6.7601			-3.545		10.3051

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	12.041
f_angle_d	0.889
f_chiral_restr	0.064
f_bond_d	0.005
f_plane_restr	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5068
Nucleic Acid Atoms
Solvent Atoms	177
Heterogen Atoms

Software

Software
Software Name	Purpose
HKL-3000	data collection
SHARP	phasing
PHENIX	refinement
HKL-3000	data reduction
HKL-3000	data scaling