PMID: 9539725May 16, 1998Paper

The TOR (target of rapamycin) signal transduction pathway regulates the stability of translation initiation factor eIF4G in the yeast Saccharomyces cerevisiae

Proceedings of the National Academy of Sciences of the United States of America
C BersetM Altmann

Abstract

Initiation factor eIF4G is an essential protein required for initiation of mRNA translation via the 5' cap-dependent pathway. It interacts with eIF4E (the mRNA 5' cap-binding protein) and serves as an anchor for the assembly of further initiation factors. With treatment of Saccharomyces cerevisiae with rapamycin or with entry of cells into the diauxic phase, eIF4G is rapidly degraded, whereas initiation factors eIF4E and eIF4A remain stable. We propose that nutritional deprivation or interruption of the TOR signal transduction pathway induces eIF4G degradation.

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