Experiment: 1M2E

Solution structure of the N-terminal domain of Synechococcus elongatus KaiA (KaiA135N); Average minimized structure.

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	HNHA	3mM KaiA135N U-15N, 50mM sodium chloride, 20mM phosphate buffer	95% H2O/5% D2O	0.17	7.0	ambient	298
2	4D_13C/15N-separated_NOESY	3mM KaiA135N U-15N,13C; 50mM sodium chloride; 20mM phosphate buffer	95% H2O/5% D2O	0.17	7.0	ambient	298
3	4D_13C-separated_NOESY	3mM KaiA135N U-15N,13C; 50mM sodium chloride; 20mM phosphate buffer	100% D2O	0.17	7.0	ambient	298
4	HNHB	3mM KaiA135N U-15N, 50mM sodium chloride, 20mM phosphate buffer	95% H2O/5% D2O	0.17	7.0	ambient	298
5	HAHB	3mM KaiA135N U-15N,13C; 50mM sodium chloride; 20mM phosphate buffer	100% D2O	0.17	7.0	ambient	298
6	BRCTCO/BRCTCN	3mM KaiA135N U-15N,13C; 50mM sodium chloride; 20mM phosphate buffer	100% D2O	0.17	7.0	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600

NMR Refinement
Method	Details	Software
Distance geometry, Simulated annealing regularization, Simulated annealing refinement	The structures are based on 2034 restraints: 1816 are NOE-derived distance constraints, 187 are dihedral angle restraints and 31 are distance restraints from hydrogen bonds	VNMR

NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number	1

Additional NMR Experimental Information
Details	Submission corresponds to the average minimized structure based on a 25-low-energy-structures family. The 1H, 15N and 13C chemical shifts of KaiA135N are deposited at the BMRB database (http://www.bmrb.wisc.edu) under the accession number 5031.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1b	Varian Associates
2	processing	NMRPipe	1.8 Rev 2001.030.21.27	Delaglio
3	data analysis	PIPP	4.2.6	Garrett
4	refinement	X-PLOR	3.851	Brunger