PMID: 20644591Jul 21, 2010Paper

Region 1112-1123 in the central domain of 18S rRNA in 40S subunits of plant ribosomes: accessibility for complementary interactions and the functional role

Bioorganicheskaia khimiia
A V ZhigaĭlovB K Iskakov

Abstract

The binding of the 18S RNA of the 40S subunits of wheat germ ribosomes to an oligodeoxyribonucleotide complementary to the 1112-1123 region of the central domain of this RNA molecule has been studied. The selective binding of this oligomer to the complementary RNA fragment and the inhibition of the translation of uncapped chimeric RNA containing enhancer sequences in the 5'-untranslated region upstream of the reporter sequence coding for beta-glucuronidase has been shown in a cell-free protein-synthesizing system. The use of a derivative of the aforementioned oligomer containing an alkylating group at the 5' end allowed for the demonstration that the 1112-1123 region of 18S RNA can form a heteroduplex with the complementary sequence of the oligomer. The data obtained show that the 1112-1123 region in loop 27 of the central domain of 18S RNA of 40S ribosomal subunits is exposed on the subunit surface and probably participates in the cap-independent binding of the subunits to mRNA due to the complementary interaction with the enhancer sequences.

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Citations

Mar 30, 2012·PLoS Genetics·Pamela A BarendtCasim A Sarkar

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