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© Research
Publication : The EMBO journal

Rae1/YacP, a new endoribonuclease involved in ribosome-dependent mRNA decay in Bacillus subtilis

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The EMBO journal - 31 Mar 2017

Leroy M, Piton J, Gilet L, Pellegrini O, Proux C, Coppée JY, Figaro S, Condon C

Link to Pubmed [PMID] – 28363943

EMBO J. 2017 May;36(9):1167-1181

The PIN domain plays a central role in cellular RNA biology and is involved in processes as diverse as rRNA maturation, mRNA decay and telomerase function. Here, we solve the crystal structure of the Rae1 (YacP) protein of Bacillus subtilis, a founding member of the NYN (Nedd4-BP1/YacP nuclease) subfamily of PIN domain proteins, and identify potential substrates in vivo Unexpectedly, degradation of a characterised target mRNA was completely dependent on both its translation and reading frame. We provide evidence that Rae1 associates with the B. subtilis ribosome and cleaves between specific codons of this mRNA in vivo Critically, we also demonstrate translation-dependent Rae1 cleavage of this substrate in a purified translation assay in vitro Multiple lines of evidence converge to suggest that Rae1 is an A-site endoribonuclease. We present a docking model of Rae1 bound to the B. subtilis ribosomal A-site that is consistent with this hypothesis and show that Rae1 cleaves optimally immediately upstream of a lysine codon (AAA or AAG) in vivo.

https://www.ncbi.nlm.nih.gov/pubmed/28363943