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The Cryptic Plastid of Euglena longa Defines a New Type of Nonphotosynthetic Plastid Organelle

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F20%3AA21027BK" target="_blank" >RIV/61988987:17310/20:A21027BK - isvavai.cz</a>

  • Alternative codes found

    RIV/60077344:_____/20:00537372 RIV/60076658:12310/20:43901716 RIV/00216208:11310/20:10421425

  • Result on the web

    <a href="https://msphere.asm.org/content/msph/5/5/e00675-20.full.pdf" target="_blank" >https://msphere.asm.org/content/msph/5/5/e00675-20.full.pdf</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1101/765255" target="_blank" >10.1101/765255</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    The Cryptic Plastid of Euglena longa Defines a New Type of Nonphotosynthetic Plastid Organelle

  • Original language description

    Most secondary nonphotosynthetic eukaryotes have retained residual plastids whose physiological role is often still unknown. One such example is Euglena longa, a close nonphotosynthetic relative of Euglena gracilis harboring a plastid organelle of enigmatic function. By mining transcriptome data from E. longa, we finally provide an overview of metabolic processes localized to its elusive plastid. The organelle plays no role in the biosynthesis of isoprenoid precursors and fatty acids and has a very limited repertoire of pathways concerning nitrogen-containing metabolites. In contrast, the synthesis of phospholipids and glycolipids has been preserved, curiously with the last step of sulfoquinovosyldiacylglycerol synthesis being catalyzed by the SqdX form of an enzyme so far known only from bacteria. Notably, we show that the E. longa plastid synthesizes tocopherols and a phylloquinone derivative, the first such report for nonphotosynthetic plastids studied so far. The most striking attribute of the organelle could be the presence of a linearized Calvin-Benson (CB) pathway, including RuBisCO yet lacking the gluconeo-genetic part of the standard cycle, together with ferredoxin-NADP+ reductase (FNR) and the ferredoxin/thioredoxin system. We hypothesize that the ferredoxin/thioredoxin system activates the linear CB pathway in response to the redox status of the E. longa cell and speculate on the role of the pathway in keeping the redox balance of the cell. Altogether, the E. longa plastid defines a new class of relic plastids that is drastically different from the best-studied organelle of this category, the apicoplast.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10608 - Biochemistry and molecular biology

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    mSphere

  • ISSN

    2379-5042

  • e-ISSN

    2379-5042

  • Volume of the periodical

    5

  • Issue of the periodical within the volume

    5

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    19

  • Pages from-to

    e00675-20

  • UT code for WoS article

    000606508300005

  • EID of the result in the Scopus database