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. 1983 May 25;11(10):3155–3168. doi: 10.1093/nar/11.10.3155

Three helical domains form a protein binding site in the 5S RNA-protein complex from eukaryotic ribosomes.

R N Nazar, A G Wildeman
PMCID: PMC325955  PMID: 6344007

Abstract

A ribosomal protein binding site in the eukaryotic 5S rRNA has been delineated by examining the effect of sequence variation and nucleotide modification on the RNA's ability to exchange into the EDTA-released, yeast ribosomal 5S RNA-protein complex. 5S RNAs of divergent sequence from a variety of eukaryotic origins could be readily exchanged into the yeast complex but RNA from bacterial origins was rejected. Nucleotide modifications in any of three analogous helical regions in eukaryotic 5S RNAs of differing origin reduced the ability of this RNA molecule to form homologous or heterologous RNA-protein complexes. Because sequence comparisons did not indicate common nucleotide sequences in the interacting helical regions, a model is suggested in which the eukaryotic 5S RNA binding protein does not simply recognize specific nucleotide sequences but interacts with three strategically oriented helical domains or functional groups within these domains. Two of the domains bear a limited sequence homology with each other and contain an unpaired nucleotide or "bulge" similar to that recently reported for one of the 5S RNA binding proteins in Escherichia coli (Peattie, D.A., Douthwaite, S., Garrett, R.A. and Noller, H.F. (1981) Proc. Natl. Acad. Sci. 78, 7331-7335). The results further indicate that the single ribosomal protein of eukaryotic 5S RNA-protein complexes interacts with the same region of the 5S rRNA molecule as do the multiple protein components in complexes of prokaryotic origin.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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