The WHHERE coactivator complex is required for retinoic acid-dependent regulation of embryonic symmetry

Gonçalo C. Vilhais-Neto, Marjorie Fournier, Jean-Luc Plassat, Mihaela E. Sardiu, Anita Saraf, Jean-Marie Garnier, Mitsuji Maruhashi, Laurence Florens, Michael P. Washburn and Olivier Pourquié ()
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Gonçalo C. Vilhais-Neto: Université de Strasbourg
Marjorie Fournier: Université de Strasbourg
Jean-Luc Plassat: Université de Strasbourg
Mihaela E. Sardiu: Stowers Institute for Medical Research
Anita Saraf: Stowers Institute for Medical Research
Jean-Marie Garnier: Université de Strasbourg
Mitsuji Maruhashi: Université de Strasbourg
Laurence Florens: Stowers Institute for Medical Research
Michael P. Washburn: Stowers Institute for Medical Research
Olivier Pourquié: Université de Strasbourg

Nature Communications, 2017, vol. 8, issue 1, 1-13

Abstract: Abstract Bilateral symmetry is a striking feature of the vertebrate body plan organization. Vertebral precursors, called somites, provide one of the best illustrations of embryonic symmetry. Maintenance of somitogenesis symmetry requires retinoic acid (RA) and its coactivator Rere/Atrophin2. Here, using a proteomic approach we identify a protein complex, containing Wdr5, Hdac1, Hdac2 and Rere (named WHHERE), which regulates RA signaling and controls embryonic symmetry. We demonstrate that Wdr5, Hdac1, and Hdac2 are required for RA signaling in vitro and in vivo. Mouse mutants for Wdr5 and Hdac1 exhibit asymmetrical somite formation characteristic of RA-deficiency. We also identify the Rere-binding histone methyltransferase Ehmt2/G9a, as a RA coactivator controlling somite symmetry. Upon RA treatment, WHHERE and Ehmt2 become enriched at RA target genes to promote RNA polymerase II recruitment. Our work identifies a protein complex linking key epigenetic regulators acting in the molecular control of embryonic bilateral symmetry.

Date: 2017
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DOI: 10.1038/s41467-017-00593-6

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