1PMX
INSULIN-LIKE GROWTH FACTOR-I BOUND TO A PHAGE-DERIVED PEPTIDE
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 3D_15N-SEPARATED_NOESY | 1.4 MM IGF-I (15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE | 25 mM | 5.1 | 1 atm | 313 | ||
2 | HNHA | 1.4 MM IGF-I (15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE | 25 mM | 5.1 | 1 atm | 313 | ||
3 | D-HNHB | 1.4 MM IGF-I (15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE | 25 mM | 5.1 | 1 atm | 313 | ||
4 | 3D 15N-SEPARATED LOW MIXING TIME TOCSY | 1.4 MM IGF-I (15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE | 25 mM | 5.1 | 1 atm | 313 | ||
5 | 2D-15N-FILTERED NOESY | 1.4 MM IGF-I (15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE | 25 mM | 5.1 | 1 atm | 313 | ||
6 | 3D_13C-SEPARATED_NOESY | 1.4 MM IGF-I (15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE | 25 mM | 5.1 | 1 atm | 313 | ||
7 | 3D-13_FILTERED | 1.4 MM IGF-I (15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE | 25 mM | 5.1 | 1 atm | 313 | ||
8 | 13C-EDITED NOESY | 1.4 MM IGF-I (15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE | 25 mM | 5.1 | 1 atm | 313 | ||
9 | 2D-13C-FILTERED NOESY | 1.4 MM IGF-I (15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE | 25 mM | 5.1 | 1 atm | 313 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | DRX | 600 |
2 | Bruker | DRX | 800 |
NMR Refinement | ||
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Method | Details | Software |
TORSION ANGLE DYNAMICS, SIMULATED ANNEALING | THE COMPLEX WAS DETERMINED USING A TOTAL OF 905 NOE DISTANCE RESTRAINTS (146 INTRA RESIDUE, 203 SEQUENTIAL, 232 MEDIUM RANGE, 237 LONG-RANGE AND 87 INTERMOLECULAR), 24 HYDROGEN BOND RESTRAINTS, 139 DIHEDRAL ANGLE RESTRAINTS (72 PHI, 44 PSI AND 23 CHI-1). THE BEST 20 CONFORMERS (OF 100) HAD NO DISTANCE VIOLATIONS GREATER THAN 0.11A AND NO DIHEDRAL ANGLE VIOLATIONS GREATER THAN 1.5 DEGREES. RMSD FROM EXPERIMENTAL DISTANCE RESTRAINTS WAS 0.0049+/-0.0008. THE MEAN BACKBONE RMSD FROM THE MEAN STRUCTURE WAS 0.35 +/- 0.06 A FOR N, CA AND C ATOMS OF RESIDUES 3-26, 42-63 of IGF-I AND RESIDUES 3-15 OF THE PEPTIDE. 82% (17%) OF RESIDUES WERE IN THE MOST FAVOURED (ALLOWED) REGION OF PHI/PSI SPACE; NO RESIDUES WERE CONSISTENTLY IN THE DISALLOWED REGION. | CNS |
NMR Ensemble Information | |
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Conformer Selection Criteria | LEAST VIOLATION OF EXPERIMENTAL RESTRAINTS |
Conformers Calculated Total Number | 100 |
Conformers Submitted Total Number | 20 |
Representative Model | 1 (closest to the average, fewest violations) |
Additional NMR Experimental Information | |
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Details | THE RESONANCE ASSIGNMENTS WERE DETERMINED USING TRIPLE-RESONANCE NMR SPECTROSCOPY. |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | refinement | CNS | 2000.1 | ACCELRYS |
2 | structure solution | XwinNMR | 3.1 | ACCELRYS |
3 | structure solution | Felix | 98 | ACCELRYS |