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Gene
Article . 1996 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
Gene
Article . 1997
versions View all 2 versions

Gene overexpression reveals alternative mechanisms that induce GCN4 mRNA translation

Authors: N, Tavernarakis; D, Alexandraki; P, Liodis; D, Tzamarias; G, Thireos;

Gene overexpression reveals alternative mechanisms that induce GCN4 mRNA translation

Abstract

The Saccharomyces cerevisiae GCN4 gene which encodes the transcription activator Gcn4, is under translational regulation. Derepression of GCN4 mRNA translation is mediated by the Gcn2 protein kinase which phosphorylates the alpha subunit of eIF-2, upon amino-acid starvation. Here, we report that overexpression of certain Saccharomyces cerevisiae genes generates intracellular conditions that alleviate the requirement for a functional Gcn2 kinase to induce GCN4 mRNA translation. Our findings, combined with the fact that Gcn2 kinase is dispensable during the initiation phase of the cellular response to amino-acid limitation, provide the grounds to further elucidate the mechanisms underlying the physiology of this homeostatic response.

Keywords

Saccharomyces cerevisiae Proteins, Eukaryotic Initiation Factor-2, RNA, Fungal, Saccharomyces cerevisiae, DNA-Binding Proteins, Fungal Proteins, RNA, Transfer, Gene Expression Regulation, Fungal, Protein Biosynthesis, Endoribonucleases, Serine, RNA, Messenger, Phosphorylation, Genes, Suppressor, Protein Kinases

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    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    8
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
8
Average
Average
Average