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- W2002763646 abstract "Electron paramagnetic resonance (EPR) spectroscopy was used to investigate changes in dynamics of spin-labeled nucleotides in the TAR RNA (U23, U25, U38, and U40) upon binding to cations, argininamide, and two peptides derived from the Tat protein. Nearly identical changes in dynamics were obtained for either calcium or sodium ions, indicating the absence of a calcium-specific structural change for the TAR RNA in solution that had previously been suggested by crystallographic data. Similar dynamic signatures were obtained for two Tat-derived peptides that have the same important binding determinant (R52) and similar binding affinities to the TAR RNA. However, U23 and U38 were substantially less mobile for the wild-type peptide (YGRKKRRQRRR) than for the mutant (YKKKKRKKKKA), demonstrating that, flanking R52, amino acids in the wild-type sequence make specific contacts to the RNA." @default.
- W2002763646 created "2016-06-24" @default.
- W2002763646 creator A5006004732 @default.
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- W2002763646 date "2002-06-01" @default.
- W2002763646 modified "2023-09-27" @default.
- W2002763646 title "Investigation of RNA-Protein and RNA-Metal Ion Interactions by Electron Paramagnetic Resonance Spectroscopy" @default.
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- W2002763646 doi "https://doi.org/10.1016/s1074-5521(02)00150-3" @default.
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