5TX8

Solution structure of the de novo mini protein gHH_44

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D C(CO)NH	1 mM [U-99% 13C; U-99% 15N] HH2, 25 mM sodium acetate, 50 mM sodium chloride	93% H2O/7% D2O	0.075 M	4.8	1 atm	293	Varian VXRS 600
2	3D 1H-15N NOESY	1 mM [U-99% 13C; U-99% 15N] HH2, 25 mM sodium acetate, 50 mM sodium chloride	93% H2O/7% D2O	0.075 M	4.8	1 atm	293	Varian INOVA 500
3	3D 1H-13C NOESY aliphatic	1 mM [U-99% 13C; U-99% 15N] HH2, 25 mM sodium acetate, 50 mM sodium chloride	93% H2O/7% D2O	0.075 M	4.8	1 atm	293	Varian VXRS 800
4	3D HNCA	1 mM [U-99% 13C; U-99% 15N] HH2, 25 mM sodium acetate, 50 mM sodium chloride	93% H2O/7% D2O	0.075 M	4.8	1 atm	293	Varian VXRS 800
5	2D 1H-13C HSQC aliphatic	1 mM [U-99% 13C; U-99% 15N] HH2, 25 mM sodium acetate, 50 mM sodium chloride	93% H2O/7% D2O	0.075 M	4.8	1 atm	293	Varian VXRS 800
6	2D 1H-15N HSQC	1 mM [U-99% 13C; U-99% 15N] HH2, 25 mM sodium acetate, 50 mM sodium chloride	93% H2O/7% D2O	0.075 M	4.8	1 atm	293	Varian VXRS 600
7	D20 exchange	1 mM [U-99% 13C; U-99% 15N] HH2, 25 mM sodium acetate, 50 mM sodium chloride	100% D2O	0.075 M	4.8	1 atm	293	Varian VXRS 800

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	VXRS	600
2	Varian	VXRS	800
3	Varian	INOVA	500

NMR Refinement
Method	Details	Software
torsion angle dynamics	STRUCTURE DETERMINATION WAS PERFORMED ITERATIVELY USING CYANA (AUTOMATED NOESY ASSIGNMENTS). A TOTAL OF 20 STRUCTURES OUT OF 100 WITH LOWEST TARGET FUNCTION FROM THE FINAL CYANA CALCULATION WERE TAKEN AND REFINED BY RESTRAINED MOLECULAR DYNAMICS/ENERGY MINIMIZATION IN EXPLICIT WATER AFTER ADDING 0% TO THE UPPER BOUNDARY LIMIT OF THE DISTANCE RESTRAINTS AND THE VDW LIMIT TO THE LOWER RESTRAINT. PARAM19 WAS USED FOR THE WATER REFINEMENT CALCULATIONS	CYANA

NMR Ensemble Information
Conformer Selection Criteria	target function
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	1 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	CNS	1.1	Brunger A. T. et.al.
2	data analysis	Sparky	3.115	Goddard
6	processing	Felix	2007	Accelrys Software Inc.
5	structure calculation	CYANA	2.1	Guntert, Mumenthaler and Wuthrich
3	chemical shift assignment	PSVS	1.5	Bhattacharya and Montelione