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• W2038991604 abstract "Molecular genetic analyses in yeast are a powerful method to study gene regulation. Conservation of the mechanism and regulation of protein synthesis between yeast and mammalian cells makes yeast a good model system for the analysis of translation. One of the most common mechanisms of translational regulation in mammalian cells is the phosphorylation of serine-51 on the α subunit of the translation initiation factor eIF2, which causes an inhibition of general translation. In contrast, in the yeastSaccharomyces cerevisiaephosphorylation of eIF2α on serine-51 by theGCN2protein kinase mediates the translational induction ofGCN4expression. The unique structure of theGCN4mRNA makesGCN4expression especially sensitive to eIF2α phosphorylation, and the simple microbiological tests developed in yeast to analyzeGCN4expression serve as good reporters of eIF2α phosphorylation. It is relatively simple to express heterologous proteins in yeast, and it has been shown that the mammalian eIF2α kinases will functionally substitute forGCN2.Structure–function analyses of translation factors or translational regulators can also be performed by assaying for effects on general andGCN4-specific translation. Three tests can be used to study eIF2α phosphorylation and/or translational activity in yeast. First, general translation can be monitored by simple growth tests, whileGCN4expression can be analyzed using sensitive replica-plating tests. Second,GCN4translation can be quantitated by measuring expression fromGCN4–lacZreporter constructs. Finally, isoelectric focusing gels can be used to directly monitorin vivophosphorylation of eIF2α in yeast." @default.
• W2038991604 created "2016-06-24" @default.
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• W2038991604 date "1997-04-01" @default.
• W2038991604 modified "2023-10-09" @default.
• W2038991604 title "UsingGCN4as a Reporter of eIF2α Phosphorylation and Translational Regulation in Yeast" @default.
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• W2038991604 doi "https://doi.org/10.1006/meth.1996.0437" @default.
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