SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Spectrometer Information
Manufacturer Model Field Strength
Bruker DMX 750.0
Bruker AMX 600.0
Varian UNITYPLUS 500.0
NMR Refinement
Method NMR-RESTRAINED SIMULATED ANNEALING, MOLECULAR DYNAMICS, AND ENERGY MINIMIZATION.
Details NMR DISTANCE RESTRAINTS WERE ASSIGNED WITH THE AID OF ARIA (AMBIGUOUS RESTRAINTS FOR ITERATIVE ASSIGNMENT) PROCEDURE, RESULTING IN 2778 UNAMBIGUOUS AND 306 AMBIGUOUS DISTANCE RESTRAINTS. 63 J COUPLING CONSTANTS, AND 44 HYDROGEN BOND RESTRAINTS WERE ALSO USED IN THE STRUCTURE CALCULATIONS. 100 STRUCTURES WERE CALCULATED USING XPLOR NMR- RESTRAINED SIMULATED ANNEALING PROTOCOL. RESIDUES 112-231 OF THE 25 STRUCTURES WITH LOWEST TOTAL ENERGY WERE EACH SUBJECTED TO 25PS RESTRAINED MOLECULAR DYNAMICS SIMULATION IN A 6 ANGSTROM SHELL OF WATER FOLLOWED BY ENERGY MINIMIZATION USING AMBER4.1 FORCE FIELD. THE AVERAGE VIOLATION FOR DISTANCE RESTRAINTS IS 0.032A, AND FOR J COUPLING CONSTANTS IS 0.059HZ. THE AVERAGE BACKBONE ATOMIC RMSD TO THE MEAN STRUCTURE IS 0.67A FOR RESIDUES 125-227 OF THE 25 STRUCTURES. THE REFINEMENT HAS BEEN SUBMITTED TO BIOCHEMISTRY WITH THE TITLE "SOLUTION STRUCTURE OF SYRIAN HAMSTER PRION PROTEIN RPRP(90-231)". NOTE, LOWER RESOLUTION STRUCTURES PUBLISHED ON PNAS 94, 10086 (1997) WERE CALCULATED WITH THE PROGRAM DIANA DEVELOPED IN WUTHRICH'S LAB.RESIDUES 90-124 OF RPRP(90-231) ARE LARGELY UNSTRUCTURED. RESIDUES 90-111 WERE EXCLUDED IN THE FINAL STAGE OF STRUCTURE REFINEMENT. THE COORDINATES DEPOSITED TO PDB CONTAIN RESIDUES 125-228.
NMR Ensemble Information
Conformer Selection Criteria TOTAL ENERGY
Conformers Calculated Total Number 100
Conformers Submitted Total Number 25
Representative Model Choice Rationale
1 n/a
Additional NMR Experimental Information
1 IONIC_STRENGTH: NULL PRESSURE: 1 ATM SOLVENT SYSTEM: 1MM PROTEIN, H2O, 20 MM SODIUM ACETATE THE 1H, 15N AND 13C RESONANCES WERE ASSIGNED USING TRIPLE RESONANCE NMR EXPERIMENTS HNCA, HNCACB, CBCACONNH, HNCO, HCCH-TOCSY ACQUIRED ON 500 AND 600 MHZ SPECTROMETERS WITH UNIFORMLY 13C/15N-LABELED SAMPLE. DISTANCE RESTRAINTS WERE OBTAINED FROM 750 MHZ 15N-HSQC-NOESY AND 13C-HSQC- NOESY SPECTRA WITH 100MS MIXING TIME.
Computation: NMR Software
# Classification Software Name Author
1 refinement ARIA M. NILGES
2 refinement XPLOR A. T. BRUNGER
3 refinement AMBER4.1 P. A. KOLLMAN
4 structure solution ARIA --
5 structure solution XPLOR --
6 structure solution AMBER --