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Complex of enzyme IIAmannose and the histidine-containing phosphocarrier protein HPr from escherichia coli nmr, restrained regularized mean structure
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
1) TRIPLE RESONANCE FOR ASSIGNMENT OF PROTEIN
40 mM SODIUM PHOSPHATE
6.5
308.00
2
(2) QUANTITATIVE J CORRELATION FOR COUPLING CONSTANTS
40 mM SODIUM PHOSPHATE
6.5
308.00
3
(3) 3D,4D HETERONUCLEAR SEPARATED, FILTERED NOE EXPTS'
40 mM SODIUM PHOSPHATE
6.5
308.00
6
(4) TRSOE-BASED 2D, 3D EXPERIMENTS FOR DIPOLAR COUPLINGS. DIPOLAR COUPLINGS WERE MEASURED IN A NEMATIC PHASE OF A 5% PEG/HEXANOL (SURFACTANT TO ALCOHOL RATION OF 0.96)
40 mM SODIUM PHOSPHATE
6.5
308.00
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
AVANCE DMX
500
2
Bruker
AVANCE DMX
600
3
Bruker
AVANCE DRX
750
4
Bruker
AVANCE DRX
800
5
Bruker
AVANCE DRX
800
NMR Refinement
Method
Details
Software
CONJOINED RIGID BODY/TORSION ANGLE DYNAMICS
THE STRUCTURES WERE CALCULATED BY CONJOINED RIGID BODY/TORSION ANGLE DYNAMICS (SCHWIETERS & CLORE (2001) J.MAGN.RESON 152, 288-302). THE TARGET FUNCTIONS COMPRISES TERMS FOR NOE RESTRAINTS, SIDECHAIN TORSION ANGLE RESTRAINTS, RESIDUAL DIPOLAR COUPLING RESTRAINTS (CLORE ET AL. J.MAGN.RESON. 131, 159-162 (1998); J.MAGN.RESON.133, 216-221(1998)), A RADIUS OF GYRATION TERM (KUSZEWSKI ET AL.(1999), A QUARTIC VAN DER WAALS REPULSION TERM (NILGES ET AL. (1988) FEBS LETT. 229, 129- 136), AND A TORSION ANGLE CONFORMATIONAL DATABASE POTENTIAL OF MEAN FORCE (CLORE AND KUSZEWSKI 2002) J.AM.CHEM.SOC 124, 2866-2867). THE STARTING COORDINATE COME FROM THE X-RAY STRUCTURES (WITH PROTONS ADDED) OF E. COLI HPR (1POH, JIA ET AL. (1993) J.BIOL.CHEM. 268, 22940-22501, RESOLUTION 2.0 A); AND IIAMAN (1PDO, NUNN ET AL. (1996) J.MOL.BI J.MOL.BIOL. 259, 502-511; RESOLUTION 1.7A). THE BACKBONE COORDINATES AND NON-INTERFACIAL SIDECHAINS ARE TREATED AS RIGID BODIES THROUGHOUT WITH THE IIAMAN DIMER HELD FIXED, THE TWO HPR MOLECULES ALLOWED TO ROTATE AND TRANSLATE, AND THE AXIS OF THE SINGLE DIPOLAR COUPLING ALIGNMENT TENSOR FREE TO ROTATE. THE INTERFACIAL SIDECHAINS ARE GIVEN FULL TORSIONAL DEGREES OF FREEDOM.