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Solution NMR structure of MqsA, a protein from E. coli, containing a Zinc finger, N-terminal and a Helix Turn-Helix C-terminal domain
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
2D 1H-15N HSQC
1mM [U-100% 13C; U-100% 15N] Ygit
95% H2O/5% D2O
25
5
0.7 atm
37
2
3D HNCA
1mM [U-100% 13C; U-100% 15N] Ygit
95% H2O/5% D2O
25
5
0.7 atm
37
3
3D HNCACB
1mM [U-100% 13C; U-100% 15N] Ygit
95% H2O/5% D2O
25
5
0.7 atm
37
4
3D HNCO
1mM [U-100% 13C; U-100% 15N] Ygit
95% H2O/5% D2O
25
5
0.7 atm
37
5
3D CBCA(CO)NH
1mM [U-100% 13C; U-100% 15N] Ygit
95% H2O/5% D2O
25
5
0.7 atm
37
6
3D HBHA(CO)NH
1mM [U-100% 13C; U-100% 15N] Ygit
95% H2O/5% D2O
25
5
0.7 atm
37
7
3D C(CO)NH
1mM [U-100% 13C; U-100% 15N] Ygit
95% H2O/5% D2O
25
5
0.7 atm
37
8
3D H(CCO)NH
1mM [U-100% 13C; U-100% 15N] Ygit
95% H2O/5% D2O
25
5
0.7 atm
37
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Varian
INOVA
800
NMR Refinement
Method
Details
Software
simulated annealing
3 7 CYCLES OF CYANA - CANDID. A) KEEPING MANUAL ASSIGNEMENTS B) ALLOWING MANUAL ASSIGNEMENTS TO VARIATE C) ADDING EXTRA CSVALUES FROM STATISTICAL TABLES.
IF THE N-TERMINUS DOMAIN IS ALIGNED IT LOOKS STRUCTURED AND THE C-TERMINUS ROTATES. THE TWO ALIGNMENTS GIVE A SOMEHOW DIFFERENT IMPRESSION ABOUT THE PROTEIN AND VERIFY THAT EACH DOMAIN IS INDIVIDUALLY STRUCTURED.
THERE ARE TWO B-SHEETS ONE WITH 4 STRANDS AND ONE WITH TWO LONG STRANDS.
THE 4 STRANDS MIGHT BELONG TO THE SAME SHEET OR THEY MAY BE TWO TIMES TWO STRANDS OR A SMALL B-BARREL.
THEY BIND AND THEY ARE STABILIZED BY ZN.