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NMR Structure of the Free Zinc Binding C-terminal Domain of SecA
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
2D TOCSY
2.5mM protein, 2.7mM ZnCl, 10mM PO4 buffer
10% D2O; 90% H2O
2.7mM ZnCl; 10mM PO4 buffer
7.40
1 atm
298
2
2D NOESY
2.5mM protein, 2.7mM ZnCl, 10mM PO4 buffer
10% D2O; 90% H2O
2.7mM ZnCl; 10mM PO4 buffer
7.40
1 atm
298
3
Natural Abundance N-HSQC
2.5mM protein, 2.7mM ZnCl, 10mM PO4 buffer
10% D2O; 90% H2O
2.7mM ZnCl; 10mM PO4 buffer
6.03
1 atm
298
4
Natural Abundance C-HSQC
2.5mM protein, 2.7mM ZnCl, 10mM PO4 buffer
99% D20; 1% H20
2.7mM ZnCl; 10mM PO4 buffer
6.43
1 atm
298
5
Hydrogen Exchange
1.4mM protein, 1.6mM ZnCl, 10mM PO4 buffer
99.96% D2O
1.6mM ZnCl; 10mM PO4 buffer
6.14
1 atm
298
6
2D NOESY
2.5mM protein, 2.7mM ZnCl, 10mM PO4 buffer
99% D20; 1% H20
2.7mM ZnCl; 10mM PO4 buffer
6.43
1 atm
298
7
E-COSY
2.5mM protein, 2.7mM ZnCl, 10mM PO4 buffer
99% D20; 1% H20
2.7mM ZnCl; 10mM PO4 buffer
6.43
1 atm
298
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Varian
INOVA
500
2
Varian
INOVA
500
3
Varian
INOVA
500
4
Varian
INOVA
500
NMR Refinement
Method
Details
Software
standard x-plor protocol;
1. distance geometry sub-embed
2. distance geometry full embed
3. simulated annealing
4. simulated annealing refine
Felix
NMR Ensemble Information
Conformer Selection Criteria
structures with acceptable covalent geometry,structures with favorable non-bond energy,structures with the least restraint violations,structures with the lowest energy,target function
Conformers Calculated Total Number
500
Conformers Submitted Total Number
20
Representative Model
1 (closest to the average,fewest violations,lowest energy)