2L28

Solution structure of lactobacillus casei dihydrofolate reductase apo-form, 25 conformers

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D DQF-COSY	2 mM entity-1, 100 mM potassium chloride-2, 50 mM potassium phosphate-3, 0.1 % sodium azide-4	100% D2O	100	6.5	ambient	288
2	2D 1H-1H NOESY	2 mM entity-1, 100 mM potassium chloride-2, 50 mM potassium phosphate-3, 0.1 % sodium azide-4	100% D2O	100	6.5	ambient	288
3	2D 1H-15N HSQC	1 mM [U-99% 15N] entity-9, 100 mM potassium chloride-10, 50 mM potassium phosphate-11, 0.1 % sodium azide-12	95% H2O/5% D2O	100	6.5	ambient	288
4	2D 1H-13C HSQC	1 mM [U-99% 13C; U-99% 15N] entity-5, 100 mM potassium chloride-6, 50 mM potassium phosphate-7, 0.1 % sodium azide-8	90% H2O/10% D2O	100	6.5	ambient	288
5	3D HNCO	1 mM [U-99% 13C; U-99% 15N] entity-5, 100 mM potassium chloride-6, 50 mM potassium phosphate-7, 0.1 % sodium azide-8	90% H2O/10% D2O	100	6.5	ambient	288
6	3D HNCA	1 mM [U-99% 13C; U-99% 15N] entity-5, 100 mM potassium chloride-6, 50 mM potassium phosphate-7, 0.1 % sodium azide-8	90% H2O/10% D2O	100	6.5	ambient	288
7	3D HN(CO)CA	1 mM [U-99% 13C; U-99% 15N] entity-5, 100 mM potassium chloride-6, 50 mM potassium phosphate-7, 0.1 % sodium azide-8	90% H2O/10% D2O	100	6.5	ambient	288
8	3D HNCACB	1 mM [U-99% 13C; U-99% 15N] entity-5, 100 mM potassium chloride-6, 50 mM potassium phosphate-7, 0.1 % sodium azide-8	90% H2O/10% D2O	100	6.5	ambient	288
9	3D HCCH-TOCSY	1 mM [U-99% 13C; U-99% 15N] entity-5, 100 mM potassium chloride-6, 50 mM potassium phosphate-7, 0.1 % sodium azide-8	90% H2O/10% D2O	100	6.5	ambient	288
10	3D HNHA	1 mM [U-99% 15N] entity-9, 100 mM potassium chloride-10, 50 mM potassium phosphate-11, 0.1 % sodium azide-12	95% H2O/5% D2O	100	6.5	ambient	288
11	3D HNHB	1 mM [U-99% 15N] entity-9, 100 mM potassium chloride-10, 50 mM potassium phosphate-11, 0.1 % sodium azide-12	95% H2O/5% D2O	100	6.5	ambient	288
12	3D 1H-15N NOESY	1 mM [U-99% 15N] entity-9, 100 mM potassium chloride-10, 50 mM potassium phosphate-11, 0.1 % sodium azide-12	95% H2O/5% D2O	100	6.5	ambient	288
13	3D 1H-13C NOESY	1 mM [U-99% 13C; U-99% 15N] entity-5, 100 mM potassium chloride-6, 50 mM potassium phosphate-7, 0.1 % sodium azide-8	90% H2O/10% D2O	100	6.5	ambient	288
14	2D 15N-rejected NOESY	1 mM [U-99% 15N] entity-9, 100 mM potassium chloride-10, 50 mM potassium phosphate-11, 0.1 % sodium azide-12	95% H2O/5% D2O	100	6.5	ambient	288
15	2D IPAP	1 mM [U-99% 15N] entity-13, 100 mM potassium chloride-14, 50 mM potassium phosphate-15, 0.1 % sodium azide-16, 5 % DMPC/DHPC-17	95% H2O/5% D2O	100	6.5	ambient	288
16	2D 1H-15N HSQC	2 mM entity-1, 100 mM potassium chloride-2, 50 mM potassium phosphate-3, 0.1 % sodium azide-4	100% D2O	100	6.5	ambient	288

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	800
2	Varian	INOVA	600
3	Bruker	AVANCE	600
4	Varian	UNITYPLUS	500

NMR Refinement
Method	Details	Software
simulated annealing		VNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations
Conformers Calculated Total Number	50
Conformers Submitted Total Number	25
Representative Model	1 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1	Varian
2	collection	TopSpin		Bruker Biospin
3	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
4	peak picking	Sparky		Goddard
5	chemical shift assignment	Sparky		Goddard
6	data analysis	TALOS		Cornilescu, Delaglio and Bax
7	geometry optimization	Anglesearch		Polshakov VI & Feeney J.
8	data analysis	NMRest		Polshakov VI
9	structure solution	CNS	1.2	Brunger, Adams, Clore, Gros, Nilges and Read
10	refinement	CNS	1.2	Brunger, Adams, Clore, Gros, Nilges and Read
11	data analysis	ProcheckNMR		Laskowski and MacArthur
12	data analysis	Insight II	2000	Accelrys Software Inc.