1CFF
NMR SOLUTION STRUCTURE OF A COMPLEX OF CALMODULIN WITH A BINDING PEPTIDE OF THE CA2+-PUMP
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | HNCO | 90% H2O/10% D2O, 100% D2O | 0.115 | 6.5 | 1 atm | 303 | ||
2 | HNCA | 90% H2O/10% D2O, 100% D2O | 0.115 | 6.5 | 1 atm | 303 | ||
3 | CBCACONH | 90% H2O/10% D2O, 100% D2O | 0.115 | 6.5 | 1 atm | 303 | ||
4 | CBCANH | 90% H2O/10% D2O, 100% D2O | 0.115 | 6.5 | 1 atm | 303 | ||
5 | HCCCONH | 90% H2O/10% D2O, 100% D2O | 0.115 | 6.5 | 1 atm | 303 | ||
6 | HCCH-TOCSY | 90% H2O/10% D2O, 100% D2O | 0.115 | 6.5 | 1 atm | 303 | ||
7 | NOESY-HSQC | 90% H2O/10% D2O, 100% D2O | 0.115 | 6.5 | 1 atm | 303 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | DRX600 | 600 |
2 | Bruker | DRX800 | 800 |
NMR Refinement | ||
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Method | Details | Software |
simulated annealing | REFINEMENT DETAILS CAN BE FOUND IN THE JRNL CITATION ABOVE. IT IS IMPOSSIBLE TO SUPERIMPOSE THE N- AND C-TERMINAL DOMAIN OF CAM SIMULTANEOUSLY DUE TO THE LACK OF NOES BETWEEN BOTH DOMAINS. THEREFOR THE 26 STRUCTURES ARE SUPERIMPOSED ONLY OVER THE BACKBONE ATOMS OF THE C-TERMINAL DOMAIN OF CAM AND THE PEPTIDE C20W. RMSD VALUES OF THE N-TERMINAL DOMAIN OF CAM (LEU A 4 - ALA A 73) ARE 0.85 (BACKBONE) AND 1.27 (HEAVY ATOMS) ANGSTROMS. RMSD VALUE FOR THE C- TERMINAL DOMAIN OF CAM AND THE PEPTIDE C20W (ILE A 85 - MET A 145, GLY B 4 - GLN B 16) ARE 0.57 (BACKBONE) AND 1.08 (HEAVY ATOMS) ANGSTROMS. RESIDUES ALA A 1 - GLN A 3, ARG A 74 - GLU A 84, THR A 146 - LYS A 148 OF CAM AND RESIDUES LEU B 1 - ARG B 3, THR B 17 - LYS B 20 OF THE PEPTIDE C20W ARE DISORDERED. | X-PLOR |
NMR Ensemble Information | |
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Conformer Selection Criteria | LOWEST ENERGY |
Conformers Calculated Total Number | 200 |
Conformers Submitted Total Number | 26 |
Additional NMR Experimental Information | |
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Details | THE UNLABELED PEPTIDE C20W WAS ASSIGNED USING A 12C,14N-FILTERED NOESY- EXPERIMENT. INTERMOLECULAR NOES BETWEEN 13C,15N-LABELED CALMODULIN AND THE PEPTIDE WERE MEASURED USING A 12C,14N-F2-FILTERED NOESY-HSQC EXPERIMENT |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | refinement | X-PLOR | 3.851 | BRUNGER |
2 | structure solution | XPLOR |