2KRU

Solution NMR structure of the PCP_red domain of light-independent protochlorophyllide reductase subunit B from Chlorobium tepidum. Northeast Structural Genomics Consortium Target CtR69A

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
2	2D 1H-13C CT-HSQC ali	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
3	2D 1H-13C CT-HSQC (methyl)	0.986 mM [U-5% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
4	3D HNCO	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
5	3D CBCA(CO)NH	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
6	3D HNCACB	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
7	3D HBHA(CO)NH	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
8	3D HCCH-TOCSY	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
9	3D HCCH-COSY ali	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
10	13C/15N-NOESY	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
11	2D 1H-13C CT-HSQC aro	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
12	3D HCCH-COSY aro	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298
13	2D 1H-15N LR-HSQC (Histidine)	1.080 mM [U-100% 13C; U-100% 15N] protein, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 0.02 % NaN3	95% H2O/5% D2O	117.5	6.5	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	500
2	Varian	INOVA	750

NMR Refinement
Method	Details	Software
simulated annealing	Structure determination was performed iteratively with CYANA v2.1 using NOE-based constraints and PHI and PSI dihedral angle constraints from TALOS+. The 20 conformers out of 100 with the lowest target function were further refined by simulated annealing in explicit water bath using the program CNS with OPLSX force field.	VnmrJ

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	VnmrJ	2.1B	Varian
2	processing	PROSA	6.4	Guntert
3	data analysis	XEASY		Bartels et al.
4	chemical shift assignment	PINE	1.0	Bahrami, Markley, Assadi, and Eghbalnia
5	structure solution	CYANA	2.1	Guntert, Mumenthaler and Wuthrich
6	structure solution	AutoStructure	2.2.1	Huang, Tejero, Powers and Montelione
7	data analysis	TALOS+	1.2009.0721.18	Shen, Cornilescu, Delaglio and Bax
8	refinement	CNS	1.2.1	Brunger, Adams, Clore, Gros, Nilges and Read
9	chemical shift assignment	CARA	1.8.4	Keller and Wuthrich
10	peak picking	CARA	1.8.4	Keller and Wuthrich
11	data analysis	CARA	1.8.4	Keller and Wuthrich
12	validation	PSVS	1.3	Bhattacharya and Montelione

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.