Experiment: 6ALI

Solution NMR structure of a putative thioredoxin (ECH_0218) in the oxidized state from Ehrlichia chaffeensis, the etiological agent responsible for human monocytic ehrlichiosis. Seattle Structural Genomics Center for Infectious Disease target EhchA.00546.a

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D HNCACB	0.1 mM sodium chloride, 0.02 mM TRIS	93% H2O/7% D2O	0.12 M	7.0	ambient atm	293	Varian VXRS 600
2	3D CBCA(CO)NH	0.1 mM sodium chloride, 0.02 mM TRIS	93% H2O/7% D2O	0.12 M	7.0	ambient atm	293	Varian VXRS 600
3	3D HNCO	0.1 mM sodium chloride, 0.02 mM TRIS	93% H2O/7% D2O	0.12 M	7.0	ambient atm	293	Varian VXRS 600
4	3D 1H-13C NOESY aliphatic	0.1 mM sodium chloride, 0.02 mM TRIS	93% H2O/7% D2O	0.12 M	7.0	ambient atm	293	Varian VXRS 800
5	3D 1H-13C NOESY aromatic	0.1 mM sodium chloride, 0.02 mM TRIS	93% H2O/7% D2O	0.12 M	7.0	ambient atm	293	Varian VXRS 800
8	3D C(CO)NH	0.1 mM sodium chloride, 0.02 mM TRIS	93% H2O/7% D2O	0.12 M	7.0	ambient atm	293	Varian VXRS 600
7	3D 1H-15N NOESY	0.1 mM sodium chloride, 0.02 mM TRIS	93% H2O/7% D2O	0.12 M	7.0	ambient atm	293	Varian VXRS 750
6	2D 1H-15N HSQC	0.1 mM sodium chloride, 0.02 mM TRIS	93% H2O/7% D2O	0.12 M	7.0	ambient atm	293	Varian VXRS 750
10	2D 1H-13C HSQC aliphatic	0.1 mM sodium chloride, 0.02 mM TRIS	93% H2O/7% D2O	0.12 M	7.0	ambient atm	293	Varian VXRS 600
9	2D 1H-13C HSQC aromatic	0.1 mM sodium chloride, 0.02 mM TRIS	93% H2O/7% D2O	0.12 M	7.0	ambient atm	293	Varian VXRS 600
11	2D 1H-15N HSQC deuterium exchange	0.1 mM sodium chloride, 0.02 mM TRIS	93% H2O/7% D2O	0.12 M	7.0	ambient atm	293	Varian VXRS 600

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	VXRS	750
2	Varian	VXRS	800
3	Varian	VXRS	600

NMR Refinement
Method	Details	Software
torsion angle dynamics	Proline 97 was fixed in the cis-position based on all other Thioredoxin structures. 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 (CNS) AFTER ADDING 5% 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	structure calculation	CYANA	2.1	Guntert, Mumenthaler and Wuthrich
3	processing	Felix	2007	Accelrys Software Inc.
4	data analysis	Sparky	3.115	Goddard
5	data analysis	PSVS	1.5	Bhattacharya and Montelione
6	data analysis	TALOS	+	Cornilescu, Delaglio and Bax