Download MendeleyAcetylation regulates the oligomerization state and activity of RNase J, the Helicobacter pylori major ribonuclease.
Tejada-Arranz, A., Lulla, A., Bouilloux-Lafont, M., Turlin, E., Pei, X.Y., Douche, T., Matondo, M., Williams, A.H., Raynal, B., Luisi, B.F., De Reuse, H.(2023) Nat Commun 14: 8072-8072
- PubMed: 38057323
- DOI: https://doi.org/10.1038/s41467-023-43825-8
- Primary Citation of Related Structures:
7PCR, 8CGL - PubMed Abstract:
In the gastric pathogen Helicobacter pylori, post-transcriptional regulation relies strongly on the activity of the essential ribonuclease RNase J. Here, we elucidated the crystal and cryo-EM structures of RNase J and determined that it assembles into dimers and tetramers in vitro. We found that RNase J extracted from H. pylori is acetylated on multiple lysine residues. Alanine substitution of several of these residues impacts on H. pylori morphology, and thus on RNase J function in vivo. Mutations of Lysine 649 modulates RNase J oligomerization in vitro, which in turn influences ribonuclease activity in vitro. Our structural analyses of RNase J reveal loops that gate access to the active site and rationalizes how acetylation state of K649 can influence activity. We propose acetylation as a regulatory level controlling the activity of RNase J and its potential cooperation with other enzymes of RNA metabolism in H. pylori.
Organizational Affiliation:
Département de Microbiologie, Unité Pathogenèse de Helicobacter, UMR CNRS 6047, Institut Pasteur, Paris, France.
