2L3W

Solution NMR Structure of the PBS linker domain of phycobilisome rod linker polypeptide from Synechococcus elongatus, Northeast Structural Genomics Consortium Target SnR168A

SOLUTION NMR

---

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
2	2D 1H-13C CT-HSQC aliphatic	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
3	2D 1H-13C CT-HSQC aromatic	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
4	2D 1H-13C HSQC aliphatic	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
5	3D HNCACB	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
6	3D HNCO	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
7	3D simutaneous 13C-aromatic,13C-aliphatic,15N edited 1H-1H NOESY	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
8	3D HN(CA)CO	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
9	3D CBCA(CO)NH	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
10	3D HBHA(CO)NH	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
11	3D (H)CCH-COSY aliphatic	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
12	3D (H)CCH-COSY aromatic	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
13	3D HCCH-TOCSY	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
14	2D 1H-15N LR-HSQC (Histidine)	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
15	1D 1H-15N HSQC T1	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
16	1D 1H-15N HSQC T2	0.9 mM [U-100% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
17	2D 1H-13C CT-HSQC (methyl)	0.7 mM [5% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
18	2D 1H-15N J-modulated HSQC	0.7 mM [5% 13C; U-100% 15N] SnR168A, 20 mM MES, 100 mM sodium chloride, 5 mM calcium chloride, 10 mM DTT, 0.02 % sodium azide	90% H2O/10% D2O		6.5	ambient	298
19	2D 1H-15N J-modulated HSQC	0.45 mM [5% 13C; U-100% 15N] SnR168A, 13 mM MES, 160 mM sodium chloride, 3.2 mM calcium chloride, 6.4 mM DTT, 0.025 % sodium azide, 2.4 mM potassium phosphate, 0.5 mM magnesium chloride, 13.2 g/l Pf1 phage	85% H2O/15% D2O		6.5	ambient	298
20	2D 1H-15N J-modulated HSQC	0.46 mM [5% 13C; U-100% 15N] SnR168A, 18 mM MES, 90 mM sodium chloride, 4.5 mM calcium chloride, 9 mM DTT, 0.02 % sodium azide, 4 % C12E5 PEG, 4 % hexanol	85% H2O/15% D2O		6.5	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	900
2	Varian	INOVA	750
3	Bruker	AVANCE	700
4	Varian	INOVA	600
5	Varian	INOVA	500

NMR Refinement
Method	Details	Software
simulated annealing	Structure determination was performed by running CYANA and AUTOSTRUCTURE in parallel using NOE-based constraints and PHI and PSI dihedral angle constraints from TALOS+. Consensus peak assignments were selected and used in iterative refinement with CYANA, with RDC constraints added at later stages. 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 PARAM19 force field and upper limit constraints relaxed by 5%	CNS

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	refinement	CNS	1.2	Brunger, Adams, Clore, Gros, Nilges and Read
2	structure solution	CNS	1.2	Brunger, Adams, Clore, Gros, Nilges and Read
3	geometry optimization	CNS	1.2	Brunger, Adams, Clore, Gros, Nilges and Read
4	refinement	CYANA	3.0	Guntert, Mumenthaler and Wuthrich
5	geometry optimization	CYANA	3.0	Guntert, Mumenthaler and Wuthrich
6	structure solution	CYANA	3.0	Guntert, Mumenthaler and Wuthrich
7	structure solution	AutoStructure	2.2.1	Huang, Tejero, Powers and Montelione
8	data analysis	AutoStructure	2.2.1	Huang, Tejero, Powers and Montelione
9	data analysis	AutoAssign	2.3.0	Zimmerman, Moseley, Kulikowski and Montelione
10	chemical shift assignment	AutoAssign	2.3.0	Zimmerman, Moseley, Kulikowski and Montelione
11	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
12	data analysis	XEASY		Bartels et al.
13	collection	TopSpin		Bruker Biospin
14	processing	TopSpin		Bruker Biospin
15	collection	VnmrJ		Varian
16	data analysis	CARA	1.8.4	Keller and Wuthrich
17	chemical shift assignment	CARA	1.8.4	Keller and Wuthrich
18	peak picking	CARA	1.8.4	Keller and Wuthrich
19	geometry optimization	TALOS+		Shen, Cornilescu, Delaglio and Bax
20	processing	PROSA	6.4	Guntert