Academic Journal
Dynamics of the putative RNA helicase Spb4 during ribosome assembly in Saccharomyces cerevisiae.
| العنوان: | Dynamics of the putative RNA helicase Spb4 during ribosome assembly in Saccharomyces cerevisiae. |
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| المؤلفون: | García-Gómez, Juan José, Lebaron, Simon, Froment, Carine, Monsarrat, Bernard, Henry, Yves, de La Cruz, Jesús |
| المساهمون: | Departamento de Genética, Laboratoire de biologie moléculaire eucaryote (LBME), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre de Biologie Intégrative (CBI), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de pharmacologie et de biologie structurale (IPBS), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | ISSN: 0021-9304. |
| بيانات النشر: | HAL CCSD John Wiley & Sons |
| سنة النشر: | 2011 |
| المجموعة: | Université Toulouse III - Paul Sabatier: HAL-UPS |
| مصطلحات موضوعية: | MESH: Biocompatible Materials, MESH: Time Factors, MESH: Animals, MESH: Antineoplastic Agents, MESH: Cell Proliferation, MESH: Cell Shape, MESH: Chromosomal Position Effects, MESH: DNA, MESH: DNA Topoisomerases, Type II, MESH: Drosophila melanogaster, MESH: Gene Expression Regulation, MESH: Biodegradation, Environmental, MESH: Genes, Insect, MESH: Histones, MESH: Humans, MESH: Models, Animal, MESH: Phenotype, MESH: Podophyllotoxin, MESH: Polyamines, MESH: Repetitive Sequences, Nucleic Acid, MESH: Suppression, Genetic, MESH: Topoisomerase II Inhibitors, MESH: Female, MESH: X Chromosome |
| الوصف: | International audience ; Spb4 is a putative ATP-dependent RNA helicase that is required for proper processing of 27SB pre-rRNAs and therefore for 60S ribosomal subunit biogenesis. To define the timing of association of this protein with preribosomal particles, we have studied the composition of complexes that copurify with Spb4 tagged by tandem affinity purification (TAP-tagged Spb4). These complexes contain mainly the 27SB pre-rRNAs and about 50 ribosome biogenesis proteins, primarily components of early pre-60S ribosomal particles. To a lesser extent, some protein factors of 90S preribosomal particles and the 35S and 27SA pre-rRNAs also copurify with TAP-tagged Spb4. Moreover, we have obtained by site-directed mutagenesis an allele that results in the R360A substitution in the conserved motif VI of the Spb4 helicase domain. This allele causes a dominant-negative phenotype when overexpressed in the wild-type strain. Cells expressing Spb4(R360A) display an accumulation of 35S and 27SB pre-rRNAs and a net 40S ribosomal subunit defect. TAP-tagged Spb4(R360A) displays a greater steady-state association with 90S preribosomal particles than TAP-tagged wild-type Spb4. Together, our data indicate that Spb4 is a component of early nucle(ol)ar pre-60S ribosomal particles containing 27SB pre-rRNA. Apparently, Spb4 binds 90S preribosomal particles and dissociates from pre-60S ribosomal particles after processing of 27SB pre-rRNA. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/pmid/21825077; hal-00667448; https://hal.science/hal-00667448; PUBMED: 21825077 |
| DOI: | 10.1128/MCB.05436-11 |
| الاتاحة: | https://hal.science/hal-00667448 https://doi.org/10.1128/MCB.05436-11 |
| رقم الانضمام: | edsbas.3E4A263F |
| قاعدة البيانات: | BASE |
| DOI: | 10.1128/MCB.05436-11 |
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