Fluorescence properties of glutamine-binding protein from Escherichia coli and its complex with glutamine (Articolo in rivista)

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  • Fluorescence properties of glutamine-binding protein from Escherichia coli and its complex with glutamine (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/pr0498077 (literal)
Alternative label
  • Kuznetsova I.M.; Stepanenko O.V.; Turoverov K.K.; Staiano M.; Scognamiglio V.; Rossi M.; D’Auria S. (2005)
    Fluorescence properties of glutamine-binding protein from Escherichia coli and its complex with glutamine
    in Journal of proteome research (Print); ACS, American chemical society, Washington, DC (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Kuznetsova I.M.; Stepanenko O.V.; Turoverov K.K.; Staiano M.; Scognamiglio V.; Rossi M.; D’Auria S. (literal)
Pagina inizio
  • 417 (literal)
Pagina fine
  • 423 (literal)
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  • 4 (literal)
Rivista
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  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • Institute of Cytology, Russian Academy of Science, 194064 St. Petersburg, Russia, Institute of Protein Biochemistry, C.N.R., 111 80131 Naples, Italy (literal)
Titolo
  • Fluorescence properties of glutamine-binding protein from Escherichia coli and its complex with glutamine (literal)
Abstract
  • In this work, the fluorescence of glutamine-binding protein (GlnBP) and its complex with glutamine (GlnBP/Gln) in native and unfolded forms was studied. The experimental data were interpreted on the basis of the results of the analysis of Trp and Tyr microenvironments taking into the account the data for GlnBP mutated forms Trp32Phe(Tyr) and Trp220Phe(Tyr), which have been obtained by Axelsen et al. ( Biophys. J.1991, 60, 650-659). This allowed us to explain the negligible contribution of Tyr residues to the bulk fluorescence of the native protein, the similarity of the fluorescence characteristics of GlnBP and GlnBP/Gln, and the uncommon effect of the excess of the fluorescence intensity at 365 nm (Trp emission) upon excitation at 297 nm respect to the excitation at 280 nm. The last effect is explained by the spectral dependence of the Trp 32 and Trp 220 contributions to the protein absorption. The protein Trp fluorescence dependence on the excitation wavelength must be taken into account for the evaluation of the Tyr residues contribution to the bulk fluorescence of protein, and in principle, it also may be used for the development of an approach for the decomposition of a multicomponent protein fluorescence spectrum. (literal)
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