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-Structure paper
タイトル | Acetylation regulates the oligomerization state and activity of RNase J, the Helicobacter pylori major ribonuclease. |
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ジャーナル・号・ページ | Nat Commun, Vol. 14, Issue 1, Page 8072, Year 2023 |
掲載日 | 2023年12月6日 |
著者 | Alejandro Tejada-Arranz / Aleksei Lulla / Maxime Bouilloux-Lafont / Evelyne Turlin / Xue-Yuan Pei / Thibaut Douché / Mariette Matondo / Allison H Williams / Bertrand Raynal / Ben F Luisi / Hilde De Reuse / |
PubMed 要旨 | 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 ...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. |
リンク | Nat Commun / PubMed:38057323 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 2.75 - 4.1 Å |
構造データ | EMDB-16647, PDB-8cgl: PDB-7pcr: |
化合物 | ChemComp-HOH: |
由来 |
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キーワード | HYDROLASE / RNase J / Helicobacter pylori / RNA metabolism / RNA BINDING PROTEIN / ribonuclease / degradosome |