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Assembly and nuclear export of pre-ribosomal particles in budding yeast

Gerhardy, Stefan ; Menet, Anna ; Peña, Cohue ; Petkowski, Janusz ; Panse, Vikram

In: Chromosoma, 2014, vol. 123, no. 4, p. 327-344

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    Titre
    • Assembly and nuclear export of pre-ribosomal particles in budding yeast
    Auteur
    • Gerhardy, Stefan. Institute of Biochemistry (IBC), ETH Zürich, Otto-Stern-Weg 3, 8093, Zürich, Switzerland
    • Menet, Anna. Institute of Biochemistry (IBC), ETH Zürich, Otto-Stern-Weg 3, 8093, Zürich, Switzerland
    • Peña, Cohue. Institute of Biochemistry (IBC), ETH Zürich, Otto-Stern-Weg 3, 8093, Zürich, Switzerland
    • Petkowski, Janusz. Institute of Biochemistry (IBC), ETH Zürich, Otto-Stern-Weg 3, 8093, Zürich, Switzerland
    • Panse, Vikram. Institute of Biochemistry (IBC), ETH Zürich, Otto-Stern-Weg 3, 8093, Zürich, Switzerland
    Type de document
    • Postprint
    Classification
    • Santé
    Identifiant OAI-PMH
    • oai:doc.rero.ch:325080
    Summary
    The ribosome is responsible for the final step of decoding genetic information into proteins. Therefore, correct assembly of ribosomes is a fundamental task for all living cells. In eukaryotes, the construction of the ribosome which begins in the nucleolus requires coordinated efforts of >350 specialized factors that associate with pre-ribosomal particles at distinct stages to perform specific assembly steps. On their way through the nucleus, diverse energy-consuming enzymes are thought to release assembly factors from maturing pre-ribosomal particles after accomplishing their task(s). Subsequently, recruitment of export factors prepares pre-ribosomal particles for transport through nuclear pore complexes. Pre-ribosomes are exported into the cytoplasm in a functionally inactive state, where they undergo final maturation before initiating translation. Accumulating evidence indicates a tight coupling between nuclear export, cytoplasmic maturation, and final proofreading of the ribosome. In this review, we summarize our current understanding of nuclear export of pre-ribosomal subunits and cytoplasmic maturation steps that render pre-ribosomal subunits translation-competent.