2DQ5

solution structure of the Mid1 B Box2 Chc(D/C)C2H2 Zinc-Binding Domain: insights into an evolutionary conserved ring fold

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	15N-H1 HSQC	0.75-1.0mM 15N & 15N/13C labeled BBOX2; 50mM Tris-HCL, 100mM NaCl, 1mM ZnCl2, 10mM beta-mercaptoethanol; 2% sodium azide; 90% H2O, 10% D2O	90% H2O/10% D2O	50mM Tris-HCl; 100mM NaCl; 5mM ZnCl2, 10mM beta-mercaptoethanol	7.5	ambient	294
2	HNCA and HNCACB	0.75-1.0mM 15N & 15N/13C labeled BBOX2; 50mM Tris-HCL, 100mM NaCl, 1mM ZnCl2, 10mM beta-mercaptoethanol; 2% sodium azide; 90% H2O, 10% D2O	90% H2O/10% D2O	50mM Tris-HCl; 100mM NaCl; 5mM ZnCl2, 10mM beta-mercaptoethanol	7.5	ambient	294
3	3D-1H-15N-15N-HSQC-NOESY-HSQC	0.75-1.0mM 15N & 15N/13C labeled BBOX2; 50mM Tris-HCL, 100mM NaCl, 1mM ZnCl2, 10mM beta-mercaptoethanol; 2% sodium azide; 90% H2O, 10% D2O	90% H2O/10% D2O	50mM Tris-HCl; 100mM NaCl; 5mM ZnCl2, 10mM beta-mercaptoethanol	7.5	ambient	294
4	1H-15N-NOESY-HSQC and 1H-13C-NOESY-HSQC	0.75-1.0mM 15N & 15N/13C labeled BBOX2; 50mM Tris-HCL, 100mM NaCl, 1mM ZnCl2, 10mM beta-mercaptoethanol; 2% sodium azide; 90% H2O, 10% D2O	90% H2O/10% D2O	50mM Tris-HCl; 100mM NaCl; 5mM ZnCl2, 10mM beta-mercaptoethanol	7.5	ambient	294
5	15N-1H HSQC	0.75-1.0mM 15N & 15N/13C labeled BBOX2; 50mM Tris-HCL, 100mM NaCl, 1mM ZnCl2, 10mM beta-mercaptoethanol; 2% sodium azide; 90% H2O, 10% D2O	90% H2O/10% D2O	50mM Tris-HCl; 100mM NaCl; 5mM ZnCl2, 10mM beta-mercaptoethanol	7.5	ambient	294
6	1H-13C-HCCH-TOCSY	0.75-1.0mM 15N & 15N/13C labeled BBOX2; 50mM Tris-HCL, 100mM NaCl, 1mM ZnCl2, 10mM beta-mercaptoethanol; 2% sodium azide; 90% H2O, 10% D2O	90% H2O/10% D2O	50mM Tris-HCl; 100mM NaCl; 5mM ZnCl2, 10mM beta-mercaptoethanol	7.5	ambient	294

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600

NMR Refinement
Method	Details	Software
torsion angle dynamics, low target function	A total of 200 random structures were calculated with CYANA2.1 using a fast torsion angle dynamics algorithm and the best structures were selected based on their low target function (less 1), no NOE violation less than 0.2 Ang, vdw < 0.25, dihedral <3o.	NMRPipe

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	200
Conformers Submitted Total Number	16
Representative Model	1 (minimized average structure, lowest energy, fewest violations, closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	NMRPipe		Delaglio, F., Grzesiek, S., Vuister, G.W., Zhu, G. Pfeifer, J., Bax, A.
2	data analysis	Sparky	3.110	Goddard, T.D., Kneller, D.G.
3	data analysis	TALOS		Cornilescu, G. Delaglio, F., Bax, A.
4	refinement	CYANA	2.1	Guentert, P.

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.