Journal
NATURE CHEMICAL BIOLOGY
Volume 9, Issue 12, Pages 834-+Publisher
NATURE PORTFOLIO
DOI: 10.1038/NCHEMBIO.1363
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Funding
- NIH [RR19895-02]
- Japan Society for the Promotion of Science fellowship for research abroad
- US National Institutes of Health [GM022778, DE022340]
- Howard Hughes Medical Institute
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Cyclic di-adenosine monophosphate (c-di-AMP) is a recently discovered bacterial second messenger implicated in the control of cell wall metabolism, osmotic stress responses and sporulation. However, the mechanisms by which c-di-AMP triggers these physiological responses have remained largely unknown. Notably, a candidate riboswitch class called ydaO associates with numerous genes involved in these same processes. Although a representative ydaO motif RNA recently was reported to weakly bind ATP, we report that numerous members of this noncoding RNA class selectively respond to c-di-AMP with subnanomolar affinity. Our findings resolve the mystery regarding the primary ligand for this extremely common riboswitch class and expose a major portion of the super-regulon of genes that are controlled by the widespread bacterial second messenger c-di-AMP.
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