RETRACTED: Assembly of Endogenous oskar mRNA Particles for Motor-Dependent Transport in the Drosophila Oocyte
| Autor: | Anne Ephrussi, Alvar Trucco, Imre Gaspar |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
animal structures
Dynein Kinesins RNA-binding protein Biology oskar Microtubules Heterogeneous-Nuclear Ribonucleoproteins General Biochemistry Genetics and Molecular Biology Microtubule Animals Drosophila Proteins RNA Messenger Kinesin binding Ribonucleoprotein urogenital system Biochemistry Genetics and Molecular Biology(all) Dyneins RNA-Binding Proteins Anatomy Cell biology Ribonucleoproteins Oocytes Exon junction complex Kinesin Drosophila |
| Zdroj: | Cell. 139(5):983-998 |
| ISSN: | 0092-8674 |
| DOI: | 10.1016/j.cell.2009.10.012 |
| Popis: | oskar mRNA localization at the oocyte posterior pole is essential for correct patterning of the Drosophila embryo. Here we show at the ultrastructural level that endogenous oskar ribonucleoprotein complexes (RNPs) assemble sequentially with initial recruitment of Hrp48 and the exon junction complex (EJC) to oskar transcripts in the nurse cell nuclei, and subsequent recruitment of Staufen and microtubule motors, following transport to the cytoplasm. oskar particles are non-membrane-bound structures that coalesce as they move from the oocyte anterior to the posterior pole. Our analysis uncovers a role for the EJC component Barentsz in recruiting Tropomyosin II (TmII) to oskar particles in the ooplasm and reveals that TmII is required for kinesin binding to the RNPs. Finally, we show that both kinesin and dynein associate with oskar particles and are the primary microtubule motors responsible for transport of the RNPs within the oocyte. |
| Databáze: | OpenAIRE |
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