>>>   Click for Diagenode’s approach to COVID-19

Direct entry by RNase E is a major pathway for the degradation and processing of RNA in Escherichia coli.

Clarke JE, Kime L, Romero A D, McDowall KJ

Escherichia coli endoribonuclease E has a major influence on gene expression. It is essential for the maturation of ribosomal and transfer RNA as well as the rapid degradation of messenger RNA. The latter ensures that translation closely follows programming at the level of transcription. Recently, one of the hallmarks of RNase E, i.e. its ability to bind via a 5'-monophosphorylated end, was shown to be unnecessary for the initial cleavage of some polycistronic tRNA precursors. Here we show using RNA-seq analyses of ribonuclease-deficient strains in vivo and a 5'-sensor mutant of RNase E in vitro that, contrary to current models, 5'-monophosphate-independent, 'direct entry' cleavage is a major pathway for degrading and processing RNA. Moreover, we present further evidence that direct entry is facilitated by RNase E binding simultaneously to multiple unpaired regions. These simple requirements may maximize the rate of degradation and processing by permitting multiple sites to be surveyed directly without being constrained by 5'-end tethering. Cleavage was detected at a multitude of sites previously undescribed for RNase E, including ones that regulate the activity and specificity of ribosomes. A potentially broad role for RNase G, an RNase E paralogue, in the trimming of 5'-monophosphorylated ends was also revealed.

Bioruptor Plus
RNA Shearing

Share this article

February, 2015



  • DNA methylation workshop: Become an expert at RRBS
    Oct 1-Oct 31, 2021
  • Dutch Chromatin Meeting
    Radboud UMC, Geert Grooteplein 15, 6525 EZ Nijmegen, The Netherlands, Experience center, route 292 to 307
    Nov 12, 2021
 See all events


 See all news

The European Regional Development Fund and Wallonia are investing in your future.

Extension of industrial buildings and new laboratories.


       Site map   |   Contact us   |   Conditions of sales   |   Conditions of purchase   |   Privacy policy   |   Diagenode Diagnostics