The excludon: A new concept in bacterial antisense RNA-mediated gene regulation

Nina Sesto, Omri Wurtzel, Cristel Archambaud, Rotem Sorek*, Pascale Cossart

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


In recent years, non-coding RNAs have emerged as key regulators of gene expression. Among these RNAs, the antisense RNAs (asRNAs) are particularly abundant, but in most cases the function and mechanism of action for a particular asRNA remains elusive. Here, we highlight a recently discovered paradigm termed the excludon, which defines a genomic locus encoding an unusually long asRNA that spans divergent genes or operons with related or opposing functions. Because these asRNAs can inhibit the expression of one operon while functioning as an mRNA for the adjacent operon, they act as fine-tuning regulatory switches in bacteria.

Original languageEnglish
Pages (from-to)75-82
Number of pages8
JournalNature Reviews Microbiology
Issue number2
StatePublished - Feb 2013
Externally publishedYes


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