FEATURES

FAMILY

DESCRIPTION

Also known as RNE_ECOLI, rne, ams, hmp1. Endoribonuclease that plays a central role in RNA processing and decay. Required for the maturation of 5S and 16S rRNAs and the majority of tRNAs. Also involved in the degradation of most mRNAs. Can also process other RNA species, such as RNAI, a molecule that controls the replication of ColE1 plasmid, and the cell division inhibitor DicF-RNA. It initiates the decay of RNAs by cutting them internally near their 5'-end. It is able to remove poly(A) tails by an endonucleolytic process. Required to initiate rRNA degradation during both starvation and quality control; acts after RNase PH (rph) exonucleolytically digests the 3'-end of the 16S rRNA (PubMed:27298395). Degradation of 16S rRNA leads to 23S rRNA degradation (PubMed:27298395). Processes the 3 tRNA(Pro) precursors immediately after the 3'-CCA to generate the mature ends (PubMed:27288443)., Prefers 5'-monophosphorylated substrates over 5'-triphosphorylated substrates (PubMed:10762247). 5'-monophosphate-assisted cleavage requires at least 2 and preferably 3 or more unpaired 5'-terminal nucleotides. The optimal spacing between the 5' end and the scissile phosphate appears to be 8 nucleotides. Any sequence of unpaired nucleotides at the 5'-end is tolerated (PubMed:26694614). Component of the RNA degradosome, which is a multiprotein complex involved in RNA processing and mRNA degradation. Within the RNA degradosome, RNase E assembles into a homotetramer formed by a dimer of dimers. Tetramerization is essential for catalytic activity, but not for RNA-binding. Interacts with RhlB, PNPase (pnp) and enolase (eno). Interacts with DeaD at reduced temperature.

EXTERNAL LINKS

rne

Ribonuclease E

rne

Molecular Synopsis