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- W1588436196 abstract "Oligopeptides containing tyrosyl, lysyl, and alanyl residues bind to polynucleotides and nucleic acids as shown by proton magnetic resonance, fluorescence spectroscopy, and difference absorption spectroscopy. Proton magnetic resonance data indicate that stacking of tyrosyl residues with nucleic acid bases takes place only in single-stranded structures (such as poly(A) or denatured DNA). Stacking interactions lead to a quenching of tyrosine fluorescence. However, the tyrosyl fluorescence of the peptides is quenched in their complexes with both single-stranded and double-stranded nucleic acids. A comparison of the behavior of homologous peptides containing Tyr, methoxytyrosine, and Phe leads to the conclusion that hydrogen bonding of tyrosine with bases or phosphates is not involved in the investigated complexes. An energy transfer mechanism from tyrosine to nucleic acid bases is proposed to account for fluorescence quenching in oligopeptide complexes with double-stranded DNAs. Due to the specificity of its stacking interaction for single-stranded nucleic acid structures, tyrosine might be involved through such interactions in the selective recognition of single strands by proteins." @default.
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- W1588436196 date "1979-01-01" @default.
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- W1588436196 title "The role of tyrosine in the association of proteins and nucleic acids. Specific recognition of single-stranded nucleic acids by tyrosine-containing peptides." @default.
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- W1588436196 doi "https://doi.org/10.1016/s0021-9258(17)30273-9" @default.
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