A ‘selfish’ B chromosome induces genome elimination by disrupting the histone code in the jewel wasp Nasonia vitripennis

dc.contributor.authorAldrich, John C.
dc.contributor.authorLeibholz, Alexandra
dc.contributor.authorCheema, Manjinder S.
dc.contributor.authorAusiό, Juan
dc.contributor.authorFerree, Patick M.
dc.date.accessioned2018-08-02T17:49:05Z
dc.date.available2018-08-02T17:49:05Z
dc.date.copyright2017en_US
dc.date.issued2017-02
dc.description.abstractIntragenomic conflict describes a phenomenon in which genetic elements act 'selfishly' to gain a transmission advantage at the expense of the whole genome. A non-essential, selfish B chromosome known as Paternal Sex Ratio (PSR) induces complete elimination of the sperm-derived hereditary material in the jewel wasp Nasonia vitripennis. PSR prevents the paternal chromatin from forming chromosomes during the first embryonic mitosis, leading to its loss. Although paternally transmitted, PSR evades self-elimination in order to be inherited. We examined important post-translational modifications to the DNA packaging histones on the normal genome and the PSR chromosome in the fertilized embryo. Three histone marks -H3K9me2,3, H3K27me1, and H4K20me1 - became abnormally enriched and spread to ectopic positions on the sperm's chromatin before entry into mitosis. In contrast, other histone marks and DNA methylation were not affected by PSR, suggesting that its effect on the paternal genome is specific to a subset of histone marks. Contrary to the paternally derived genome, the PSR chromosome was visibly devoid of the H3K27me1 and H4K20me1 marks. These findings strongly suggest that PSR causes paternal genome elimination by disrupting at least three histone marks following fertilization, while PSR avoids self-elimination by evading two of these marks.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipWe thank D. and H. MacAlpine for the anti-ORC2 and anti-MCM2-7 antibodies. We also thank M. Aladjem for helpful comments. This work was funded by a National Science Foundation CAREER award (NSF-1451839) and a National Science Foundation Major Research Instrumentation grant (NSF-1429350) to P.M. Ferree, and a grant from the Natural Sciences and Engineering Research Council of Canada (NSERC 46399-2012) to J. Ausio.en_US
dc.identifier.citationAldrich, J.C.; Leibholz, A.; Cheema, M.S.; Ausiό, J.; & Ferree, P.M. (2017). A ‘selfish’ B chromosome induces genome elimination by disrupting the histone code in the jewel wasp Nasonia vitripennis. Scientific Reports, 7, article 42551. https://dx.doi.org/10.1038/srep42551en_US
dc.identifier.urihttps://dx.doi.org/10.1038/srep42551
dc.identifier.urihttp://hdl.handle.net/1828/9817
dc.language.isoenen_US
dc.publisherScientific Reportsen_US
dc.titleA ‘selfish’ B chromosome induces genome elimination by disrupting the histone code in the jewel wasp Nasonia vitripennisen_US
dc.typeArticleen_US

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