Experiment: 6N8C

Structure of the Huntingtin tetramer/dimer mixture determined by paramagnetic NMR

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	1 mM [U-13C; U-15N] httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	278	Bruker AVANCE III 600
2	2D 1H-13C CT HSQC	1 mM [U-13C; U-15N] httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	278	Bruker AVANCE III 600
3	3D CBCA(CO)NH	1 mM [U-13C; U-15N] httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	283	Bruker AVANCE III 600
4	3D HNCACB	1 mM [U-13C; U-15N] httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	283	Bruker AVANCE III 600
5	3D TOCSY-HSQC	0.6 mM [U-15N] httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	283	Bruker AVANCE III 800
6	13CA SQ CPMG	1 mM 2-13C glucose; U-15N httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	278	Bruker AVANCE III 600
7	13CA SQ CPMG	0.75 mM 2-13C glucose; U-15N httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	278	Bruker AVANCE III 900
8	15N SQ CPMG	1 mM 2-13C glucose; U-15N httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	278	Bruker AVANCE III 600
9	15N SQ CPMG	0.75 mM 2-13C glucose; U-15N httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	278	Bruker AVANCE III 900
10	1HN PRE	0.6 mM [U-15N] httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	283	Bruker AVANCE III 600
11	13CA SQ CPMG	0.4 mM 2-13C glucose; U-15N httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	278
12	15N SQ CPMG	0.4 mM 2-13C glucose; U-15N httNT-Q7	90% H2O/10% D2O	50 mM	6.5	1 atm	278

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE III	600
2	Bruker	AVANCE III	800
3	Bruker	AVANCE III	900

NMR Refinement
Method	Details	Software
simulated annealing	utilized rigid backbone coordinates for helix region and employed Xplor-NIH's strict symmetry facility to generage full tetramer from protomer coordinates.	Xplor-NIH

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	1100
Conformers Submitted Total Number	10
Representative Model	1 (best fits pre data)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure calculation	Xplor-NIH	2.49	C.D. Schwieters, J.J. Kuszewski, N. Tjandra, and G.M. Clore
3	chemical shift assignment	Analysis	2.4	CCPN
4	peak picking	NMRDraw		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
5	data analysis	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
6	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
7	collection	TopSpin		Bruker Biospin