Team
RNA, Epigenetics & Stress

Dpt: Signaling through Chromatin

Our research activities

Genome regulation by (hetero)chromatin and RNA.

In our team, we seek to understand the chromatin-associated mechanisms that control genome integrity and gene expression in eukaryotes, with particular interest in the role and mode of action of regulatory RNAs.

We focus on two fundamental cellular processes as model systems: - the process of heterochromatin formation and maintenance, which is critical for chromosome segregation, genome defense, and cell identity, - the process of reprogramming genome expression (including within heterochromatin) in response to environmental or metabolic stress, which is critical for cell adaptation and survival. Both processes are broadly conserved among eukaryotes and share a common set of regulations involving chromatin and RNA.

We explore these processes in the fission yeast Schizosaccharomyces pombe and in humans.

Our studies combine chromatin- and RNA-centric approaches with innovative proteomics, powerful yeast molecular genetics, CRISPR-based genome editing of human cells, genome- and transcriptome-wide sequencing, and state-of-the-art microscopy. This research has the potential to provide general insights into when, where, and how chromatin and chromatin-associated RNA molecules control genome stability and gene expression, and to thereby shed light on fascinating new mechanisms in the fields of RNA and chromatin biology and how their deregulation may be linked to cancer and other diseases.

André VERDEL

Team leader, Scientific manager

04 76 54 94 46

Our research axes

Using the fission yeast Schizosaccharomyces pombe (S. pombe) and human cell lines as evolutionarily distant model systems, we investigate the potentially conserved role, mode of action and regulation of noncoding RNAs (ncRNAs) and their producing transcription in the context of pericentromeric heterochromatin.

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By focusing on nuclear members of the conserved family of YTH RNA binding proteins and the cell response to various stresses, we are investigating the role of transcripts (ncRNAs and mRNAs) and their internal methylation (m6A, which is specifically recognized by the YTH proteins) in controlling gene expression by acting in the environment of both heterochromatin and euchromatin. 

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In our team, we are using and developing innovative RNA-based technologies for genome editing and for purification and characterization of proteins.

Our major publications

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Protocol to study the role of a human nuclear m6A RNA reader on chromatin-associated RNA targets

Seigneurin-Berny D#, Touat-Todeschini L, Timcheva K, Verdel A#

STAR Protocols 2023 # Co-corresponding authors

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Chromatin-associated YTHDC1 coordinates heat-induced reprogramming of gene expression

Timcheva K, Dufour S, Touat-Todeschini L, Burnard C, Carpentier MC, Chuffart F, Merret R, Helsmoortel…

Cell Rep. 2022 Dec 13;41(11):111784. doi: 10.1016/j.celrep.2022.111784.PMID: 36516773 # Co-corresponding authors

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HSF1-Activated Non-Coding Stress Response: Satellite lncRNAs and Beyond, an Emerging Story with a Complex Scenario

Vourc'h C#, Dufour S, Timcheva K, Seigneurin-Berny D, Verdel A#

Genes (Basel) 2022 Mar 27;13(4):597. doi:10.3390/genes13040597.PMID: 35456403 # Co-corresponding authors

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Structural analysis of Red1 as a conserved scaffold of the RNA-targeting MTREC/PAXT complex

Foucher AE, Touat-Todeschini L, Juarez-Martinez AB, Rakitch A, Laroussi H, Karczewski C, Acajjaoui S, Soler-López…

Nat Commun 2022 Aug 24;13(1):4969. doi: 10.1038/s41467-022-32542-3.PMID: 36002457 # Co-corresponding authors

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ATAD2 controls chromatin-bound HIRA turnover

Wang T, Perazza D, Boussouar F, Cattaneo M, Bougdour A, Chuffart F, Barral S, Vargas…

Life Sci Alliance 2021 Sep 27;4(12):e202101151. doi:10.26508/lsa.202101151. Print 2021 Dec.PMID: 34580178 # Co-corresponding authors

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Chromosome Y pericentric heterochromatin is a primary target of HSF1 in male cells

Penin J, Dufour S, Faure V, Fritah S, Seigneurin-Berny D, Col E, Verdel A#, Vourc'h C#

Chromosoma 2021 Mar;130(1):53-60. doi: 10.1007/s00412-021-00751-2.PMID: 33547955 # Co-corresponding authors

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Bromodomain factors of BET family are new essential actors of pericentric heterochromatin transcriptional activation in response to heat shock

Col E, Hoghoughi N, Dufour S, Penin J, Koskas S, Faure V, Ouzounova M, Hernandez-Vargash…

Sci Rep. 2017 Jul 14;7(1):5418. doi: 10.1038/s41598-017-05343-8.PMID: 28710461

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Heat shock factor 1 promotes TERRA transcription and telomere protection upon heat stress

Koskas S, Decottignies A, Dufour S, Pezet M, Verdel A, Vourc'h C, Faure V.

Nucleic Acids Res. 2017 Jun 20;45(11):6321-6333. doi: 10.1093/nar/gkx208.PMID: 28369628

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Selective termination of lncRNA transcription promotes heterochromatin silencing and cell differentiation

Touat-Todeschini L, Shichino Y, Dangin M, Thierry-Mieg N, Gilquin B, Hiriart E, Sachidanandam R, Lambert…

EMBO J. 2017 2017 Sep 1;36(17):2626-2641. doi: 10.15252/embj.201796571.PMID: 28765164

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Mmi1 RNA surveillance machinery directs RNAi complex RITS to specific meiotic genes in fission yeast

Hiriart E, Vavasseur A, Touat-Todeschini L, Yamashita A, Gilquin B, Lambert E, Perot J, Shichino…

EMBO J. 2012 May 16;31(10):2296-308. doi: 10.1038/emboj.2012.105.PMID: 22522705 

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Our activities in pictures

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