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  • 1
    Publikationsdatum: 2022-05-25
    Beschreibung: Author Posting. © The Author(s), 2017. This is the author's version of the work. It is posted here by permission of Cell Press for personal use, not for redistribution. The definitive version was published in Cell 169 (2017): 191-202, doi:10.1016/j.cell.2017.03.025.
    Beschreibung: RNA editing, a post-transcriptional process, allows the diversification of proteomes beyond the genomic blueprint; however it is infrequently used among animals. Recent reports suggesting increased levels of RNA editing in squids thus raise the question of their nature and effects in these organisms. We here show that RNA editing is particularly common in behaviorally sophisticated coleoid cephalopods, with tens of thousands of evolutionarily conserved sites. Editing is enriched in the nervous system affecting molecules pertinent for excitability and neuronal morphology. The genomic sequence flanking editing sites is highly conserved, suggesting that the process confers a selective advantage. Due to the large number of sites, the surrounding conservation greatly reduces the number of mutations and genomic polymorphisms in protein coding regions. This trade-off between genome evolution and transcriptome plasticity highlights the importance of RNA recoding as a strategy for diversifying proteins, particularly those associated with neural function.
    Beschreibung: NLB was supported by a post-doctoral scholarship from the Center for Nanoscience and Nanotechnology, Tel-Aviv University. The research of RU is supported by the Israel Science Foundation (772/13). The research of EYL was supported by the European Research Council (311257) and the Israel Science Foundation (1380/14). The research of JJCR was supported by the National Institutes of Health [1R0111223855, 1R01NS64259], the National Science Foundation (HRD- 1137725), and the Frank R. Lillie and Laura and Arthur Colwin Research Fellowships from the Marine Biological Laboratory in Woods Hole. The work of JJCR and EE was supported by grant No 094/2013 from the United States-Israel Binational Science Foundation (BSF).
    Beschreibung: 2018-04-06
    Schlagwort(e): Epitranscriptome ; RNA modifications ; RNA editing ; ADAR ; Neural plasticity ; Cephalopods ; Genome evolution ; Proteome diversity
    Repository-Name: Woods Hole Open Access Server
    Materialart: Preprint
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 2022-05-25
    Beschreibung: © The Author(s), 2017. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Molecular Biology and Evolution 34 (2017): 1890-1901, doi:10.1093/molbev/msx125.
    Beschreibung: The highly conserved ADAR enzymes, found in all multicellular metazoans, catalyze the editing of mRNA transcripts by the deamination of adenosines to inosines. This type of editing has two general outcomes: site specific editing, which frequently leads to recoding, and clustered editing, which is usually found in transcribed genomic repeats. Here, for the first time, we looked for both editing of isolated sites and clustered, non-specific sites in a basal metazoan, the coral Acropora millepora during spawning event, in order to reveal its editing pattern. We found that the coral editome resembles the mammalian one: it contains more than 500,000 sites, virtually all of which are clustered in non-coding regions that are enriched for predicted dsRNA structures. RNA editing levels were increased during spawning and increased further still in newly released gametes. This may suggest that editing plays a role in introducing variability in coral gametes.
    Beschreibung: This work was supported by the Australian Research Council (to PK), the European Research Council (grant 311257), the I-CORE Program of the Planning and Budgeting Committee in Israel (grants 41/11 and 1796/12), and the Israel Science Foundation (1380/14).
    Schlagwort(e): RNA editing ; ADAR ; Evolution ; Coral
    Repository-Name: Woods Hole Open Access Server
    Materialart: Article
    Standort Signatur Erwartet Verfügbarkeit
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