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PLoS Genet. 2018 Jul 11;14(7):e1007498. doi: 10.1371/journal.pgen.1007498. eCollection 2018 Jul.

Cyclin G and the Polycomb Repressive complexes PRC1 and PR-DUB cooperate for developmental stability.

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Sorbonne Université, Centre National de la Recherche Scientifique (CNRS), Institut de Biologie Paris-Seine (IBPS), Laboratory of Developmental Biology (LBD), Paris, France.
Institut de biologie de l'Ecole normale supérieure (IBENS), Ecole normale supérieure, CNRS, INSERM, PSL Université Paris Paris, France.
Sorbonne Université, Univ Antilles, Univ Nice Sophia Antipolis, CNRS, Evolution Paris Seine-Institut de Biologie Paris Seine (EPS - IBPS), Paris, France.
Institut de Systematique, Evolution, Biodiversité ISYEB UMR 7205, MNHN, CNRS, Sorbonne Université, EPHE, Muséum national d'Histoire naturelle, Sorbonne Universités, Paris, France.


In Drosophila, ubiquitous expression of a short Cyclin G isoform generates extreme developmental noise estimated by fluctuating asymmetry (FA), providing a model to tackle developmental stability. This transcriptional cyclin interacts with chromatin regulators of the Enhancer of Trithorax and Polycomb (ETP) and Polycomb families. This led us to investigate the importance of these interactions in developmental stability. Deregulation of Cyclin G highlights an organ intrinsic control of developmental noise, linked to the ETP-interacting domain, and enhanced by mutations in genes encoding members of the Polycomb Repressive complexes PRC1 and PR-DUB. Deep-sequencing of wing imaginal discs deregulating CycG reveals that high developmental noise correlates with up-regulation of genes involved in translation and down-regulation of genes involved in energy production. Most Cyclin G direct transcriptional targets are also direct targets of PRC1 and RNAPolII in the developing wing. Altogether, our results suggest that Cyclin G, PRC1 and PR-DUB cooperate for developmental stability.

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