Solution-state NMR and SAXS structural ensemble of NPr (1-85) in complex with EIN-Ntr (170-424)

Phosphocarrier protein NPr (E.C.2.7.11.-), Phosphoenolpyruvate-protein phosphotransferase PtsP (E.C.2.7.3.9)

Structure of the NPr:EINNtr Complex: Mechanism for Specificity in Paralogous Phosphotransferase Systems.

This molecule was mutated at position 356 from histidine to glutamine.
In E. coli, when the native histidine is present, the sample can be phosphorylated.
It was mutated to provide a homogeneous sample.
Additionally, it comprises residues 170-424 of the larger Enzyme I-Ntr molecule.
Residue 169 is mutated to glycine due to TEV protease cleavage.

200 uM [U-13C; U-15N; U-2H] EIN-Ntr, 240 uM [U-2H] NPr, 10 mM TRIS, 100 mM sodium chloride, 0.5 mM EDTA, 93% H2O/7% D2O
240 uM [U-2H] EIN-Ntr, 200 uM [U-13C; U-15N; U-2H] NPr, 10 mM TRIS, 100 mM sodium chloride, 0.5 mM EDTA, 93% H2O/7% D2O
200 uM [U-13C; U-15N; U-2H] EIN-Ntr, 240 uM [U-2H] NPr, 10 mM TRIS, 100 mM sodium chloride, 0.5 mM EDTA, 10 mg/mL Pf1 phage, 93% H2O/7% D2O
240 uM [U-2H] EIN-Ntr, 200 uM [U-13C; U-15N; U-2H] NPr, 10 mM TRIS, 100 mM sodium chloride, 0.5 mM EDTA, 10 mg/mL Pf1 phage, 93% H2O/7% D2O
200 uM [U-13C; U-15N; U-2H] EIN-Ntr, 10 mM TRIS, 100 mM sodium chloride, 0.5 mM EDTA, 93% H2O/7% D2O
200 uM [U-13C; U-15N; U-2H] NPr, 10 mM TRIS, 100 mM sodium chloride, 0.5 mM na EDTA, 93% H2O/7% D2O
100 uM [U-13C; U-15N; U-2H] EIN-Ntr, 100 uM [U-2H] NPr, 10 mM TRIS, 100 mM sodium chloride, 0.5 mM EDTA, 93% H2O/7% D2O
200 uM [U-15N; U-2H] EIN-Ntr, 240 uM [U-2H] NPr, 10 mM TRIS, 100 mM sodium chloride, 0.5 mM EDTA, 93% H2O/7% D2O
240 uM [U-2H] EIN-Ntr, 200 uM [U-2H; U-15N] NPr, 10 mM TRIS, 100 mM sodium chloride, 0.5 mM EDTA, 93% H2O/7% D2O
Schwieters, Kuszewski, Tjandra and Clore