Béa Clouet-d’Orval is the a group leader of the RNARCHAEA “RNA biology of Archaea” team. Béa Clouet-d’Orval & Marie Bouvier are co-supervizing the scientific projects of the team.
The team “RNA biology of Archaea”, in close collaboration with local, national and international partners aims at identifying and characterizing RNA metabolic pathways that are at the centre of gene expression regulation in Euryarchaea. We develop three interconnected, basic research projects to identify and characterize novel enzymes and machineries that mediate RNA quality control, RNA stability and RNA processing pathways using Thermococcales and Halophiles as study models:
-The first project focus is to decipher the functions of archaeal β-CASP RNases and associated RNA helicases and to identify RNA metabolic pathways at work in archaeal cells (ANR-CASPAR project, BCO coordinator).
-The second focus is to elucidate how the RNA and protein quality control are coupled and coordinated to fine-tune gene expression (ANR-PROTEIN Project, BCO partner).
-Finally, the third focus is to shed light on the molecular mechanisms that control the initial steps of RNA decay.
We believe that our work will provide knowledge that should prove to be milestones in the fields of RNA metabolism and molecular biology of Archaea, the third domain of life, and potentially clarify corresponding mechanisms in Eukarya and Bacteria. In addition, it should enlighten us on specific molecular processes that allow the archaeal cells to sustain an extremophile lifestyle.
Initial steps on mRNA decay in Thermococcales
Connection between the ribosome and the RNA modification/degradation machineries in Thermococcales
Impact of the universally conserved ribonucleases from the β-CASP family on archaeal RNA metabolism
- Hadjeras L, Bouvier M, Canal I, Poljak L, Morin-Ogier Q, Froment C, Burlet-Schlitz O, Hamouche L, Girbal L, Cocaign-Bousquet M, Carpousis AJ..
Attachment of the RNA degradosome to the bacterial inner cytoplasmic membrane prevents wasteful degradation of rRNA in ribosome assembly intermediates
- Gaëlle Hogrel1,a, Sébastien Laurent2,3, Ziad Ibrahim1,b, Jacques Covès1, Eric Girard1, Frank Gabel1, Clarisse Etienne4, Marie-Claire Daugeron5, Béatrice Clouet-d’Orval4, Tamara Basta5, Didier Flament2,3, Bruno Franzetti1,*.
Characterization of a small tRNA-binding protein that interacts with the archaeal proteasome complex
Mol Microbiol . 2022 Jul;118(1-2):16-29. doi: 10.1111/mmi.14948. Epub 2022 Jun 15.
- Hajj M, Langendijk-Genevaux P, Batista M, Quentin Y, Laurent S, Capeyrou R, Abdel-Razzak Z, Flament D, Chamieh H, Fichant G, Clouet-d'Orval B, Bouvier M..
Phylogenetic Diversity of Lhr Proteins and Biochemical Activities of the Thermococcales aLhr2 DNA/RNA Helicase
- D.K. Phung, C. Etienne, M. Batista, P. Langendijk-Genevaux, Y. Moalic, S. Laurent, S. Liuu, V. Morales, M. Jebbar, G. Fichant, M. Bouvier, D. Flament, B. Clouet-d’Orval.
RNA processing machineries in Archaea: the 5′-3′ exoribonuclease aRNase J of the β-CASP family is engaged specifically with the helicase ASH-Ski2 and the 3′-5′ exoribonucleolytic RNA exosome machinery
Nucleic Acids Research
- Manon Batista1, Petra Langendijk-Genevaux1, Mirna Hajj1,Duy Khanh Phung2, Laura Plassart3, Marie Bouvier1, Gwennaële Fichant1, and Béatrice Clouet-d’Orval1*.
The Archaeal Specific Helicase of the Ski2-like family, ASH-Ski2, is an authentic RNA helicase
2019 Dec en préparation
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Mirna Hajj- former PhD
Manon Batista- former PhD
Duy Khanh Phung- former PhD
Bashir Saadek- former Post-doc