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The Trypanosoma brucei La protein is a candidate poly(U) shield that impacts spliced leader RNA maturation and tRNA intron removal

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077409%3A_____%2F05%3A00023737" target="_blank" >RIV/60077409:_____/05:00023737 - isvavai.cz</a>

  • Alternative codes found

    RIV/60076658:12310/05:00008718

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    The Trypanosoma brucei La protein is a candidate poly(U) shield that impacts spliced leader RNA maturation and tRNA intron removal

  • Original language description

    By virtue of its preferential binding to poly(U) tails on small RNA precursors and nuclear localisation motif, the La protein has been implicated for a role in the stabilisation and nuclear retention of processing intermediates for a variety of small RNAs in eukaryotic cells. La protein was targeted for selective knockdown by inducible RNA interference in Trypanosoma brucei. In the relative absence of La protein T. brucei cells were not viable, in contrast to La gene knockouts in yeast. A variety of potential small RNA substrates were examined under induction, including spliced leader RNA, spliced leader associated RNA, the U1, U2, U4, and U6 small nuclear RNAs, 5S ribosomal RNA, U3 small nucleolar RNA, and tRNATyr. This study indicates that La proteinbinding is not essential for maturation of the spliced leader RNA, but does not rule out the presence of an alternative processing pathway that could compensate for the absence of normally-associated La protein.

  • Czech name

    La protein Trypanosoma brucei je kandidátní poly(U) chránící protein, který ovlivňuje zrání spliced leader RNA a odstranění intronu z tRNA

  • Czech description

    Vzhledem k jeho preferenční vazbě k poly(U) konci malých RNA molekul se předpokládalo, že má La protein funkci při stabilizaci a jaderné retenci pro řadu malých RNA v eukaryotické buňce. Metodou indukovatelné interference RNA byl La protein u Trypanosomabrucei selektivně vypnut. Nedostatek La proteinu vedl, na rozdíl od kvasinek, k úhynu buněk T. brucei. Byla analyzována řada malých RNA substrátů, včetně spliced leader RNA, U1, U2, U4, a U6 malých jaderných RNA, 5S ribosomální RNA, U3 malé jadérkové RNA a tRNATyr. Žádná z těchto molekul nevykazovala rozdíly ve velikosti a četnosti, ačkoli byly při nedostatku La proteinu pozorovány zkrácené verze spliced leader RNA a intronu tRNATyr. Tato studie ukázala, že La protein není esenciální pro zrání splicedleader RNA, ale nevylučuje přítomnost alternativní dráhy, která by kompenzovala ztrátu La proteinu.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    EB - Genetics and molecular biology

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/IAA5022302" target="_blank" >IAA5022302: Functional analysis of candidate components of the RNA editing machinery in the flagellate Trypanosoma brucei</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2005

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    International Journal for Parasitology

  • ISSN

    0020-7519

  • e-ISSN

  • Volume of the periodical

    35

  • Issue of the periodical within the volume

    4

  • Country of publishing house

    AU - AUSTRALIA

  • Number of pages

    8

  • Pages from-to

    359-366

  • UT code for WoS article

  • EID of the result in the Scopus database