1ERF
CONFORMATIONAL MAPPING OF THE N-TERMINAL FUSION PEPTIDE OF HIV-1 GP41 USING 13C-ENHANCED FOURIER TRANSFORM INFRARED SPECTROSCOPY (FTIR)
INFRARED SPECTROSCOPY
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 13-C isotope enhanced FTIR | THIS STRUCTURE WAS DETERMINED USING 13-C ISOTOPE ENHANCED FTIR SPECTROSCOPY ON A FAMILY OF SELECTIVELY LABELED CHEMICALLY SYNTHESIZED PEPTIDES. 13-C CARBONYL LABELS INCLUDED RESIDUES 519,521,523,524,525,526,527,528,529,530,531,532,533,534,538,539. | 70% hexafluoroisopropanol (HFIP), 29.9% water, 0.1% formic acid (v/v) | 0 | 7.0 | 1 atm | 298 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Mattson FTIR | Research Series |
NMR Refinement | ||
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Method | Details | Software |
molecular dynamics, simulated annealing | Molecular dynamics (simulated annealing) was used to generate an ensemble of conformers consistent with the FTIR data. | Winfirst |
NMR Ensemble Information | |
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Conformer Selection Criteria | structures with acceptable covalent geometry |
Conformers Calculated Total Number | 31 |
Conformers Submitted Total Number | 17 |
Representative Model | 9 (closest to the average) |
Additional NMR Experimental Information | |
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Details | The coordinates in this entry were generated from 13-C induced spectral shifts which give residue-specific secondary structure information. |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | data analysis | Winfirst | FTIR curve fitting software | Kauppine et al. |
2 | refinement | DISCOVER | 2.9.7 | Molecular Simulations, Inc. (San Diego, CA) |