4H10

Intermolecular recognition revealed by the complex structure of human CLOCK-BMAL1 basic Helix-Loop-Helix domains with E-box DNA

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	PHOTON FACTORY BEAMLINE BL-17A
Synchrotron site	Photon Factory
Beamline	BL-17A
Temperature [K]	100
Detector technology	CCD
Collection date	2011-02-25
Detector	ADSC QUANTUM 315r
Wavelength(s)	1
Spacegroup name	P 31 2 1
Unit cell lengths	98.740, 98.740, 62.880
Unit cell angles	90.00, 90.00, 120.00

Refinement procedure

Resolution	38.800 - 2.402
R-factor	0.1975
Rwork	0.195
R-free	0.24400
Structure solution method	MOLECULAR REPLACEMENT
RMSD bond length	0.007
RMSD bond angle	1.255
Data reduction software	HKL-2000
Data scaling software	HKL-2000
Phasing software	MOLREP
Refinement software	PHENIX

Data quality characteristics

	Overall
Low resolution limit [Å]	38.800
High resolution limit [Å]	2.400
Number of reflections	14045
<I/σ(I)>	33.5
Completeness [%]	99.9
Redundancy	19.8

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, SITTING DROP	7.8	289	20% (w/v) PEG 3350 and 0.2 M magnesium formate, pH 7.8, VAPOR DIFFUSION, SITTING DROP, temperature 289K