https://scholars.lib.ntu.edu.tw/handle/123456789/444651
標題: | Defining the pathway of cytoplasmic maturation of the 60S ribosomal subunit | 作者: | KAI-YIN LO Li, Z. Bussiere, C. Bresson, S. Marcotte, E.M. Johnson, Arlen W. |
關鍵字: | Proteins | RNA | 公開日期: | 2010 | 出版社: | CELL PRESS | 卷: | 39 | 期: | 2 | 起(迄)頁: | 196 | 來源出版物: | Molecular Cell | 摘要: | In eukaryotic cells the final maturation of ribosomes occurs in the cytoplasm, where trans-acting factors are removed and critical ribosomal proteins are added for functionality. Here, we have carried out a comprehensive analysis of cytoplasmic maturation, ordering the known steps into a coherent pathway. Maturation is initiated by the ATPase Drg1. Downstream, assembly of the ribosome stalk is essential for the release of Tif6. The stalk recruits GTPases during translation. Because the GTPase Efl1, which is required for the release of Tif6, resembles the translation elongation factor eEF2, we suggest that assembly of the stalk recruits Efl1, triggering a step in 60S biogenesis that mimics aspects of translocation. Efl1 could thereby provide a mechanism to functionally check the nascent subunit. Finally, the release of Tif6 is a prerequisite for the release of the nuclear export adaptor Nmd3. Establishing this pathway provides an important conceptual framework for understanding ribosome maturation. © 2010 Elsevier Inc. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/444651 | ISSN: | 1097-2765 | DOI: | 10.1016/j.molcel.2010.06.018 |
顯示於: | 農業化學系 |
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