2ME8

Solution Structure of BCL-xL in its p53-bound conformation determined with selective isotope labelling of I,L,V sidechains

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	0.6 mM [U- 98% 13C; U- 98% 15N; U- 98% 2H; U- I,LV CH3 1H] BCL-xL, 0.65 mM p53	93% H2O/7% D2O	0.05	7.0	ambient	298
2	2D 1H-13C HSQC aliphatic	0.6 mM [U- 98% 13C; U- 98% 15N; U- 98% 2H; U- I,LV CH3 1H] BCL-xL, 0.65 mM p53	93% H2O/7% D2O	0.05	7.0	ambient	298
3	3D HNCACB	0.6 mM [U- 98% 13C; U- 98% 15N; U- 98% 2H; U- I,LV CH3 1H] BCL-xL, 0.65 mM p53	93% H2O/7% D2O	0.05	7.0	ambient	298
4	3D HNCO	0.6 mM [U- 98% 13C; U- 98% 15N; U- 98% 2H; U- I,LV CH3 1H] BCL-xL, 0.65 mM p53	93% H2O/7% D2O	0.05	7.0	ambient	298
5	3D 1H-15N NOESY	0.6 mM [U- 98% 13C; U- 98% 15N; U- 98% 2H; U- I,LV CH3 1H] BCL-xL, 0.65 mM p53	93% H2O/7% D2O	0.05	7.0	ambient	298
6	3D 1H-13C NOESY aliphatic	0.6 mM [U- 98% 13C; U- 98% 15N; U- 98% 2H; U- I,LV CH3 1H] BCL-xL, 0.65 mM p53	93% H2O/7% D2O	0.05	7.0	ambient	298

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

NMR Refinement
Method	Details	Software
molecular dynamics	ENERGY MINIMIZATION WITH 100 STEPS STEEPEST GRADIENT DESCENT FOLLOWED BY 100 CONJUGATE GRADIENT DESCENT STEPS	TopSpin

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin	2.1	Bruker Biospin
2	processing	TopSpin	2.1	Bruker Biospin
3	data analysis	CARA		Keller, R.L.J.
4	chemical shift assignment	CARA		Keller, R.L.J.
5	structure solution	CYANA		Guntert, Mumenthaler and Wuthrich
6	refinement	Amber		Case, Darden, Cheatham, III, Simmerling, Wang, Duke, Luo, ... and Kollman