ArticleNucleic acids research2021
A structural intermediate pre-organizes the add adenine riboswitch for ligand recognition.
Article in Nucleic acids research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 15 citations in OpenAlex.
- Exploring functional transitions of the 2'-dG riboswitch aptamer.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Magnesium ions mitigate metastable states in the regulatory landscape of mRNA elements.RNA (New York, N.Y.) · 2024Article
- Potential effects of metal ion induced two-state allostery on the regulatory mechanism of add adenine riboswitch.Communications biology · 2022Article
- Thoughts on how to think (and talk) about RNA structure.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Combining Coarse-Grained Simulations and Single Molecule Analysis Reveals a Three-State Folding Model of the Guanidine-II Riboswitch.Frontiers in molecular biosciences · 2022Article
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Authors and funding
8 authors at 2 institutions in 2 countries.
Funding
Abstract
Riboswitches are RNA sequences that regulate gene expression by undergoing structural changes upon the specific binding of cellular metabolites. Crystal structures of purine-sensing riboswitches have revealed an intricate network of interactions surrounding the ligand in the bound complex. The mechanistic details about how the aptamer folding pathway is involved in the formation of the metabolite binding site have been previously shown to be highly important for the riboswitch regulatory activity. Here, a combination of single-molecule FRET and SHAPE assays have been used to characterize the folding pathway of the adenine riboswitch from Vibrio vulnificus. Experimental evidences suggest a folding process characterized by the presence of a structural intermediate involved in ligand recognition. This intermediate state acts as an open conformation to ensure ligand accessibility to the aptamer and folds into a structure nearly identical to the ligand-bound complex through a series of structural changes. This study demonstrates that the add riboswitch relies on the folding of a structural intermediate that pre-organizes the aptamer global structure and the ligand binding site to allow efficient metabolite sensing and riboswitch genetic regulation.
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Registered trials
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