The Effect of Modification of Nucleotide-37 on the Interaction of Aminoacyl-tRNA with the a Site of the 70S Ribosome. Molecular Biology, 37(1):110-115, 2003. cited By 0
Paper doi abstract bibtex To estimate the effect of modified nucleotide 37, the interaction of two yeast aminoacyl-tRNAs (Phe-tRNA+YPhe and Phe-tRN A -YPhe) with the A site of complex [70S·poly(U) ·deacylated tRNAPhe in the P site] was assayed at 0-20°C. As comparisons with native Phe-tRNA+YPhe showed, removal of the Y base decreased the association constant of Phe-tRN A-Y Phe and the complex by an order of magnitude at every temperature tested, and increased the enthalpy of their interaction by 23 kJ/mol. When the Y base was present in the anticodon loop of deacylated tRNAPhe bound to the P site of the 70S ribosome, twice higher affinity for the A site was observed for Phe-tRN A-YPhe but not for Phe-tRN A +YPhe. Thus, the modified nucleotide 3′ of the Phe-tRNAPhe anticodon stabilized the codon-anticodon interaction both in the A and P sites of the 70S ribosome.
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