Abstract
The structure-function relationship in RNA molecules is a key to understanding of the expression of genetic information. Various types of RNA play crucial roles at almost every step of protein biosynthesis. In recent years, it has been shown that one of the most important structural elements in RNA is a wobble pair G-U. In this paper, we present for the first time an analysis of the distribution of G-U pairs in eukaryotic 5S ribosomal RNAs. Interestingly, the G-U pair in 5S rRNA species is predominantly found in two intrahelical regions of the stems I and V and at the junction of helix IV and loop A. The distribution of G-U pairs and the nature of adjacent bases suggests their possible role as a recognition site in interactions with other components of protein biosynthesis machinery.
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