Convergent origination of a Drosophila-like dosage compensation mechanism in a reptile lineage

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• dc.contributor.author Marín Flórez, Ray Marcelca
• dc.contributor.author Cortez, Diego Q.ca
• dc.contributor.author Lamanna, Francescoca
• dc.contributor.author Pradeepa, Madapura M.ca
• dc.contributor.author Leushkin, Evgeny V.ca
• dc.contributor.author Julien, Philippeca
• dc.contributor.author Liechti, Angélicaca
• dc.contributor.author Halbert, Jeanca
• dc.contributor.author Brüning, Thoomkeca
• dc.contributor.author Mössinger, Katharinaca
• dc.contributor.author Trefzer, Timoca
• dc.contributor.author Conrad, Christianca
• dc.contributor.author Kerver, Halie N.ca
• dc.contributor.author Wade, Juli S.ca
• dc.contributor.author Tschopp, Patrickca
• dc.contributor.author Kaessmann, Henrikca
• dc.date.accessioned 2018-06-15T07:49:50Z
• dc.date.available 2018-06-15T07:49:50Z
• dc.date.issued 2017
• dc.description.abstract Sex chromosomes differentiated from different ancestral autosomes in various vertebrate lineages. Here, we trace the functional evolution of the XY Chromosomes of the green anole lizard (Anolis carolinensis), on the basis of extensive high-throughput genome, transcriptome and histone modification sequencing data and revisit dosage compensation evolution in representative mammals and birds with substantial new expression data. Our analyses show that Anolis sex chromosomes represent an ancient XY system that originated at least ≈160 million years ago in the ancestor of Iguania lizards, shortly after the separation from the snake lineage. The age of this system approximately coincides with the ages of the avian and two mammalian sex chromosomes systems. To compensate for the almost complete Y Chromosome degeneration, X-linked genes have become twofold up-regulated, restoring ancestral expression levels. The highly efficient dosage compensation mechanism of Anolis represents the only vertebrate case identified so far to fully support Ohno's original dosage compensation hypothesis. Further analyses reveal that X up-regulation occurs only in males and is mediated by a male-specific chromatin machinery that leads to global hyperacetylation of histone H4 at lysine 16 specifically on the X Chromosome. The green anole dosage compensation mechanism is highly reminiscent of that of the fruit fly, Drosophila melanogaster Altogether, our work unveils the convergent emergence of a Drosophila-like dosage compensation mechanism in an ancient reptilian sex chromosome system and highlights that the evolutionary pressures imposed by sex chromosome dosage reductions in different amniotes were resolved in fundamentally different ways.
• dc.description.sponsorship We also acknowledge computational support by the state of Baden-Württemberg through bwHPC and the German Research Foundation (DFG) through grant INST 35/1134-1 FUGG; in particular, our computational work on the bwForCluster was supported by M. Baumann and S. Richling from the Heidelberg University Computational Center (Universitätsrechenzentrum, URZ). P.T. acknowledges generous support from Prof. Cliff Tabin. The overall research project was supported by grants from the European Research Council (Grant: 615253, OntoTransEvol) and Swiss National Science Foundation (Grants: 146474) to H.K., as well as the CONACyT-SEP Basic Science grant (No. 254240) awarded to D.C.
• dc.format.mimetype application/pdf
• dc.identifier.citation Marin R, Cortez D, Lamanna F, Pradeepa MM, Leushkin E, Julien P et al. Convergent origination of a Drosophila-like dosage compensation mechanism in a reptile lineage. Genome Res. 2017 Dec;27(12):1974-1987. DOI: 10.1101/gr.223727.117. Epub 2017 Nov 13
• dc.identifier.doi http://dx.doi.org/10.1101/gr.223727.117
• dc.identifier.issn 1088-9051
• dc.identifier.uri http://hdl.handle.net/10230/34913
• dc.language.iso eng
• dc.publisher Cold Spring Harbor Laboratory Press (CSHL Press)ca
• dc.relation.ispartof Genome Res. 2017 Dec;27(12):1974-1987
• dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/615253
• dc.rights © 2017 Marin et al.; Published by Cold Spring Harbor Laboratory Press This article, published in Genome Research, is available under a Creative Commons License (Attribution-NonCommercial 4.0 International), as described at http://creativecommons.org/licenses/by-nc/4.0/.
• dc.rights.accessRights info:eu-repo/semantics/openAccess
• dc.rights.uri http://creativecommons.org/licenses/by-nc/4.0/
• dc.subject.keyword Dosage compensation complex
• dc.subject.keyword Gene dosage compensation mechanism
• dc.title Convergent origination of a Drosophila-like dosage compensation mechanism in a reptile lineageca
• dc.type info:eu-repo/semantics/article
• dc.type.version info:eu-repo/semantics/publishedVersion