Defining the pathway of cytoplasmic maturation of the 60S ribosomal subunit.
Defining the pathway of cytoplasmic maturation of the 60S ribosomal subunit.
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DOI:
10.1016/j.molcel.2010.06.018
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发表时间:
2010-07-30
期刊:
影响因子:
16
通讯作者:
Johnson AW
中科院分区:
文献类型:
--
作者:
Lo KY;Li Z;Bussiere C;Bresson S;Marcotte EM;Johnson AW
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 adapter Nmd3. Establishing this pathway provides an important conceptual framework for understanding ribosome maturation.
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影响因子:
5.3
作者:
Kallstrom, G;Hedges, J;Johnson, A
通讯作者:
Johnson, A
DOI:
10.1126/science.1179709
发表时间:
2009-10-30
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Gao YG;Selmer M;Dunham CM;Weixlbaumer A;Kelley AC;Ramakrishnan V
通讯作者:
Ramakrishnan V
影响因子:
5.3
作者:
Pertschy, Brigitte;Saveanu, Cosmin;Bergler, Helmut
通讯作者:
Bergler, Helmut
影响因子:
5.3
作者:
Hung, Nai-Jung;Johnson, Arlen W.
通讯作者:
Johnson, Arlen W.
影响因子:
5.6
作者:
Graindorge, JS;Rousselle, JC;Fasiolo, F
通讯作者:
Fasiolo, F