ArticleRNA (New York, N.Y.)2016
Epistasis analysis of 16S rRNA ram mutations helps define the conformational dynamics of the ribosome that influence decoding.
Article in RNA (New York, N.Y.), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
3 citing papers in PubMed, 4 citations in OpenAlex.
- Monomeric YoeB toxin retains RNase activity but adopts an obligate dimeric form for thermal stability.Nucleic acids research · 2019Article
- Ribosomal ambiguity (ram) mutations promote the open (off) to closed (on) transition and thereby increase miscoding.Nucleic acids research · 2019Article
- Ribosome dynamics during decoding.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2017Review
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2 authors at 1 institution in 1 country.
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Abstract
The ribosome actively participates in decoding, with a tRNA-dependent rearrangement of the 30S A site playing a key role. Ribosomal ambiguity (ram) mutations have mapped not only to the A site but also to the h12/S4/S5 region and intersubunit bridge B8, implicating other conformational changes such as 30S shoulder rotation and B8 disruption in the mechanism of decoding. Recent crystallographic data have revealed that mutation G299A in helix h12 allosterically promotes B8 disruption, raising the question of whether G299A and/or other ram mutations act mainly via B8. Here, we compared the effects of each of several ram mutations in the absence and presence of mutation h8Δ2, which effectively takes out bridge B8. The data obtained suggest that a subset of mutations including G299A act in part via B8 but predominantly through another mechanism. We also found that G299A in h12 and G347U in h14 each stabilize tRNA in the A site. Collectively, these data support a model in which rearrangement of the 30S A site, inward shoulder rotation, and bridge B8 disruption are loosely coupled events, all of which promote progression along the productive pathway toward peptide bond formation.
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