Two-dimensional 1 H NMR studies of rat atrial natriuretic factor(1–23)
| Autor: | Thomas J. Perun, Stephen W. Fesik, William H. Holleman |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
Coupling constant
Magnetic Resonance Spectroscopy Chemical Phenomena Chemistry Physical Protein Conformation Phase sensitive Chemistry Chemical shift Biophysics Cell Biology Biochemistry Random coil Spectral line Rats Crystallography Proton NMR Animals Amino Acid Sequence Amino acid residue Spectroscopy Molecular Biology Atrial Natriuretic Factor |
| Zdroj: | Biochemical and Biophysical Research Communications. 131:517-523 |
| ISSN: | 0006-291X |
| DOI: | 10.1016/0006-291x(85)91266-5 |
| Popis: | Using a variety of two-dimensional NMR methods, the 1 H NMR resonances of rat ANF(1–23) in dimethyl sulfoxide-d6 solution have been assigned. Two-dimensional phase sensitive correlated spectroscopy was used to identify protons that are scalar coupled and were also used to obtain coupling constants ( 3 J NH-αCH ) in complicated regions of the spectra. Relayed coherence transfer experiments proved useful in identifying the connectivities between the NH and β-protons of the same amino acid residue. Finally, phase sensitive 2D NOE experiments allowed the identification of protons close in space between adjacent residues, thus providing the sequential assignments as well as conformational information. These preliminary results (chemical shifts, coupling constants, NOEs) were analyzed in terms of possible polypeptide secondary structures and were found to be consistent with a β-type structure or an averaging of solution conformations (random coil). |
| Databáze: | OpenAIRE |
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