Endosymbiotic gene transfer in tertiary plastid-containing dinoflagellates

Fabien Burki, Behzad Imanian, Elisabeth Hehenberger, Yoshihisa Hirakawa, Shinichiro Maruyama, Patrick J. Keeling

    Research output: Contribution to journalArticle

    30 Citations (Scopus)

    Abstract

    Plastid establishment involves the transfer of endosymbiotic genes to the host nucleus, a process known as endosymbiotic gene transfer (EGT). Large amounts of EGT have been shown in several photosynthetic lineages but also in present-day plastid-lacking organisms, supporting the notion that endosymbiotic genes leave a substantial genetic footprint in the host nucleus. Yet the extent of this genetic relocation remains debated, largely because the long period that has passed since most plastids originated has erased many of the clues to how this process unfolded. Among the dinoflagellates, however, the ancestral peridinin-containing plastid has been replaced by tertiary plastids on several more recent occasions, giving us a less ancient window to examine plastid origins. In this study, we evaluated the endosymbiotic contribution to the host genome in two dinoflagellate lineages with tertiary plastids. We generated the first nuclear transcriptome data sets for the "dinotoms," which harbor diatom-derived plastids, and analyzed these data in combination with the available transcriptomes for kareniaceans, which harbor haptophyte-derived plastids. We found low level of detectable EGT in both dinoflagellate lineages, with only 9 genes and 90 genes of possible tertiary endosymbiotic origin in dinotoms and kareniaceans, respectively, suggesting that tertiary endosymbioses did not heavily impact the host dinoflagellate genomes.

    Original languageEnglish
    Pages (from-to)246-255
    Number of pages10
    JournalEukaryotic Cell
    Volume13
    Issue number2
    DOIs
    Publication statusPublished - 2014 Feb

    ASJC Scopus subject areas

    • Microbiology
    • Molecular Biology

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  • Cite this

    Burki, F., Imanian, B., Hehenberger, E., Hirakawa, Y., Maruyama, S., & Keeling, P. J. (2014). Endosymbiotic gene transfer in tertiary plastid-containing dinoflagellates. Eukaryotic Cell, 13(2), 246-255. https://doi.org/10.1128/EC.00299-13