3K0E

Crystal structure of the phosphorylation-site mutant T426N of the KaiC circadian clock protein

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	APS BEAMLINE 21-ID-G
Synchrotron site	APS
Beamline	21-ID-G
Temperature [K]	113.15
Detector technology	CCD
Collection date	2008-04-09
Detector	MAR 300MM CCD
Spacegroup name	P 21 21 21
Unit cell lengths	132.500, 135.830, 204.320
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	30.000 - 3.200
R-factor	0.25
Rwork	0.250
R-free	0.32000
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	2gbl
RMSD bond length	0.009
Data reduction software	HKL-2000
Data scaling software	XSCALE
Refinement software	CNS (1.1)

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	30.000	3.300
High resolution limit [Å]	3.200	3.200
Rmerge	0.070	0.487
Number of reflections	57564
<I/σ(I)>	14.7	2.8
Completeness [%]	92.9	81.2

Crystallization Conditions

crystal ID	method	pH	temperature	details
1		4	291	SODIUM FORMATE, GLYCEROL, pH 4, VAPOR DIFFUSION, HANGING DROP, temperature 291K