7Li and23Na NMR studies of transmembrane cation transport mediated by ionophore lasalocid A
| Autor: | Padmaja Juvvadi, Easwaran Kalapaty |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Lasalocid
Magnetic Resonance Spectroscopy Inorganic chemistry Ionophore chemistry.chemical_element Lithium Biochemistry chemistry.chemical_compound Isotopes Structural Biology Drug Discovery Molecular Biology Calcimycin Ion transporter Pharmacology Ion Transport Vesicle Sodium Organic Chemistry General Medicine Sodium ion transport chemistry Reagent Molecular Medicine Cation transport |
| Zdroj: | Journal of Peptide Science. 4:15-20 |
| ISSN: | 1099-1387 1075-2617 |
| DOI: | 10.1002/(sici)1099-1387(199802)4:1<15::aid-psc96>3.0.co;2-e |
| Popis: | Ion transport across phospholipid vesicles was studied by 7Li and 23Na-NMR using an aqueous anionic paramagnetic shift reagent, dysprosium nitrilotriacetate [Dy(NTA)2]3?, mediated by ionophores, lasalocid A and A23187. The intra- and extracellular 7Li and 23Na-NMR signals were well separated (20?Hz) at mM concentration of the shift reagent. The observed data on the rate constant for lithium transport across DPPC vesicles at various concentrations of the ionophores indicated that lasalocid A is a more efficient carrier for lithium ion compared with the sodium ion transport by this ionophore, while A23187 was not specific to either of the ions (Li or Na). ©1998 European Peptide Society and John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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