Molecular recognition of N-protected dipeptides by pseudopeptidic macrocycles: a comparative study of the supramolecular complexes by ESI-MS and NMR
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Altres documents de l'autoria: Alfonso Rodríguez, Ignacio; Bolte, Michael; Burguete, M. Isabel; Bru Roig, Miriam; Luis, Santiago V.; Vicent Barrera, Cristian
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http://dx.doi.org/10.1039/B924981H |
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Títol
Molecular recognition of N-protected dipeptides by pseudopeptidic macrocycles: a comparative study of the supramolecular complexes by ESI-MS and NMRAutoria
Data de publicació
2010Editor
Royal Society of ChemistryISSN
1477-0520Cita bibliogràfica
Organic & Biomolecular Chemistry (2010), 8, 6, p. 1329-1339Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://pubs.rsc.org/en/content/articlelanding/2010/ob/b924981hResum
The molecular recognition properties of pseudopeptidic macrocycles have been studied by ESI-MS and NMR spectroscopy, as highly complementary experimental techniques in solution and in the gas phase. We used ESI-MS ... [+]
The molecular recognition properties of pseudopeptidic macrocycles have been studied by ESI-MS and NMR spectroscopy, as highly complementary experimental techniques in solution and in the gas phase. We used ESI-MS competition experiments for the high throughput screening of the supramolecular interaction between four macrocyclic receptors and different peptide-like substrates in solution, rendering the best-fitted host–guest pairs. Further insights on the non-covalent recognition process in the gas-phase were obtained through collision induced dissociation (CID) experiments. Solution studies using NMR spectroscopy (1H NMR titrations, NOESY and DOSY) were carried out to prove the validity of ESI-MS as a high-throughput screening method for studying the molecular recognition of the investigated pseudopeptidic macrocycles. A clear selectivity for N-protected dipeptides over N-protected amino acids, and a slight preference for dipeptides bearing aromatic side chains were observed. On the basis of the results obtained from this approach, a mode of binding has been proposed. [-]
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