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2017-01-17

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cc-by (c) Calvo-Martín, J.M. et al., 2017
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/107388

Evidence of neofunctionalization after the duplication of the highly conserved Polycomb group gene Caf1-55 in the obscura group of Drosophila

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Recurs relacionat

https://doi.org/10.1038/srep40536

Resum

Drosophila CAF1-55 protein is a subunit of the Polycomb repressive complex PRC2 and other protein complexes. It is a multifunctional and evolutionarily conserved protein that participates in nucleosome assembly and remodelling, as well as in the epigenetic regulation of a large set of target genes. Here, we describe and analyze the duplication of Caf1-55 in the obscura group of Drosophila. Paralogs exhibited a strong asymmetry in evolutionary rates, which suggests that they have evolved according to a neofunctionalization process. During this process, the ancestral copy has been kept under steady purifying selection to retain the ancestral function and the derived copy (Caf1-55dup) that originated via a DNA-mediated duplication event ~18 Mya, has been under clear episodic selection. Different maximum likelihood approaches confirmed the action of positive selection, in contrast to relaxed selection, on Caf1-55dup after the duplication. This adaptive process has also taken place more recently during the divergence of D. subobscura and D. guanche. The possible association of this duplication with a previously detected acceleration in the evolutionary rate of three CAF1-55 partners in PRC2 complexes is discussed. Finally, the timing and functional consequences of the Caf1-55 duplication is compared to other duplications of Polycomb genes.

Matèries

Proteïnes, Molècules, Drosòfila

Matèries (anglès)

Proteins, Molecules, Drosophila

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Articles publicats en revistes (Genètica, Microbiologia i Estadística)

Citació

CALVO MARTÍN, Juan Manuel, PAPACEIT VIDAL, Montserrat i SEGARRA ROBERT, Carmen. Evidence of neofunctionalization after the duplication of the highly conserved Polycomb group gene Caf1-55 in the obscura group of Drosophila. Scientific Reports. 2017. Vol. 7, núm. 40536, pàgs. 1-10. ISSN 2045-2322. [consulta: 8 de maig de 2026]. Disponible a: https://hdl.handle.net/2445/107388

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