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A role for the Saccharomyces cerevisiae ABCF protein New1 in translation termination/recycling
Umeå universitet, Medicinska fakulteten, Institutionen för molekylärbiologi (Medicinska fakulteten). Umeå universitet, Medicinska fakulteten, Molekylär Infektionsmedicin, Sverige (MIMS).ORCID-id: 0000-0002-2970-2001
Umeå universitet, Medicinska fakulteten, Institutionen för molekylärbiologi (Medicinska fakulteten). Umeå universitet, Medicinska fakulteten, Molekylär Infektionsmedicin, Sverige (MIMS).ORCID-id: 0000-0003-4966-1291
Umeå universitet, Medicinska fakulteten, Institutionen för molekylärbiologi (Medicinska fakulteten). Umeå universitet, Medicinska fakulteten, Molekylär Infektionsmedicin, Sverige (MIMS).
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2019 (engelsk)Inngår i: Nucleic Acids Research, ISSN 0305-1048, E-ISSN 1362-4962, Vol. 47, nr 16, s. 8807-8820Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Translation is controlled by numerous accessory proteins and translation factors. In the yeast Saccharomyces cerevisiae, translation elongation requires an essential elongation factor, the ABCF ATPase eEF3. A closely related protein, New1, is encoded by a non-essential gene with cold sensitivity and ribosome assembly defect knock-out phenotypes. Since the exact molecular function of New1 is unknown, it is unclear if the ribosome assembly defect is direct, i.e. New1 is a bona fide assembly factor, or indirect, for instance due to a defect in protein synthesis. To investigate this, we employed yeast genetics, cryo-electron microscopy (cryo-EM) and ribosome profiling (Ribo-Seq) to interrogate the molecular function of New1. Overexpression of New1 rescues the inviability of a yeast strain lacking the otherwise strictly essential translation factor eEF3. The structure of the ATPase-deficient (EQ2) New1 mutant locked on the 80S ribosome reveals that New1 binds analogously to the ribosome as eEF3. Finally, Ribo-Seq analysis revealed that loss of New1 leads to ribosome queuing upstream of 3′-terminal lysine and arginine codons, including those genes encoding proteins of the cytoplasmic translational machinery. Our results suggest that New1 is a translation factor that fine-tunes the efficiency of translation termination or ribosome recycling.

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Oxford University Press, 2019. Vol. 47, nr 16, s. 8807-8820
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Identifikatorer
URN: urn:nbn:se:umu:diva-164896DOI: 10.1093/nar/gkz600ISI: 000490576900040PubMedID: 31299085OAI: oai:DiVA.org:umu-164896DiVA, id: diva2:1367802
Forskningsfinansiär
Swedish Research Council, 2017-03783Swedish Research Council, 201504746Swedish Research Council, 2017-04663Ragnar Söderbergs stiftelseThe Kempe Foundations, JCK1627The Kempe Foundations, SMK-1349Magnus Bergvall Foundation, 2017-02098Åke Wiberg Foundation, M14-0207EU, Horizon 2020, 2643Swedish Research Council, 2017-03783Tilgjengelig fra: 2019-11-05 Laget: 2019-11-05 Sist oppdatert: 2019-12-09bibliografisk kontrollert

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