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1.  Defining the pathway of cytoplasmic maturation of the 60S ribosomal subunit 
Molecular cell  2010;39(2):196-208.
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.
doi:10.1016/j.molcel.2010.06.018
PMCID: PMC2925414  PMID: 20670889
ribosome; ribosome biogenesis; EFL1; NMD3; TIF6

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