Reference: DeLabre ML, et al. (2002) RPL29 codes for a non-essential protein of the 60S ribosomal subunit in Saccharomyces cerevisiae and exhibits synthetic lethality with mutations in genes for proteins required for subunit coupling. Biochim Biophys Acta 1574(3):255-61

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Abstract


RPL29 (YFR032c-a) is a non-essential gene that codes for a 60S ribosomal subunit protein in Saccharomyces cerevisiae. Deletion of RPL29 leads to a moderate accumulation of half-mer polysomes with little or no change in the amounts of free 60S subunits. In vitro translation and the growth rate are also delayed in the Deltarpl29 strain. Such a phenotype is characteristic of mutants defective in 60S to 40S subunit joining. The Deltarpl29 strain exhibits synthetic lethality with mutations in RPL10, the gene encoding an essential 60S ribosomal subunit protein that is required for 60S to 40S subunit joining. The Deltarpl29 strain also exhibits synthetic lethality with RSA1, a gene encoding a nucleoplasmic protein required for the loading of Rpl10p onto the 60S subunit. Over-expression of RPL10 suppresses the half-mer phenotype of the Deltarpl29 strain, but does not correct the growth defect of the deletion strain. We conclude that absence of Rpl29p impairs proper assembly of proteins onto the 60S subunit and that this retards subunit joining and additionally retards protein synthesis subsequent to subunit joining.

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Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, P.H.S.
Authors
DeLabre ML, Kessl J, Karamanou S, Trumpower BL
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