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. 1975 Aug;72(8):2940–2944. doi: 10.1073/pnas.72.8.2940

Binding of ribosomal protein S1 of Escherichia coli to the 3' end of 16S rRNA.

A E Dahlberg, J E Dahlberg
PMCID: PMC432894  PMID: 1103129

Abstract

Ribosomal protein S1 reversibly binds the 49-nucleotide fragment that is cleaved from the 3' end of 16S rRNA in ribosomes by colicin E3. The fragment has secondary structure in the form of a hairpin loop. At the base of the stem is a sequence (A-C-C-U-C-C) thought to be involved in the base pairing with complementary sequences in mRNA during the initiation of protein synthesis. The role of S1 may be to stabilize this region of the fragment in an open conformation to allow for base pairing to mRNA. This model is supported by the observation that S1 binds specifically to this region of the fragment. In addition, aurin tricarboxylic acid, an inhibitor of protein synthesis, reverses this effect by disrupting the S1-RNA complex. These results can explain why S1 is an essential component of the ribosome for translation of natural mRNA and why aurin tricarboxylic acid blocks initiation.

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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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