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Bolger TA, et al.  (2008) The mRNA export factor Gle1 and inositol hexakisphosphate regulate distinct stages of translation. Cell 134(4):624-33

Abstract: Gene expression requires proper messenger RNA (mRNA) export and translation. However, the functional links between these consecutive steps have not been fully defined. Gle1 is an essential, conserved mRNA export factor whose export function is dependent on the small molecule inositol hexakisphosphate (IP(6)). Here, we show that both Gle1 and IP(6) are required for efficient translation termination in Saccharomyces cerevisiae and that Gle1 interacts with termination factors. In addition, Gle1 has a conserved physical association with the initiation factor eIF3, and gle1 mutants display genetic interactions with the eIF3 mutant nip1-1. Strikingly, gle1 mutants have defects in initiation, whereas strains lacking IP(6) do not. We propose that Gle1 functions together with IP(6) and the DEAD-box protein Dbp5 to regulate termination. However, Gle1 also independently mediates initiation. Thus, Gle1 is uniquely positioned to coordinate the mRNA export and translation mechanisms. These results directly impact models for perturbation of Gle1 function in pathophysiology.

Status: Published Type: Journal Article | Research Support, N.I.H., Extramural PubMed ID: 18724935

Topics addressed in this paper

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Topics Genes linked to topics (#1 - 10 )
ARG82 DBP5 GLE1 IPK1 NAB2 NIP1 NUP116 NUP159 PRT1 SUP35
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Cellular Location blue ball blue ball
Function/Process blue ball blue ball blue ball
Genetic Interactions blue ball blue ball blue ball blue ball
Mutants/Phenotypes blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball
Non-Fungal Related Genes/Proteins blue ball
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Protein-protein Interactions blue ball blue ball blue ball
Regulatory Role blue ball
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Techniques and Reagents blue ball

Topics Genes linked to topics (#11 - 12 )
SUP45 TIF35
Additional Literature blue ball
Genetic Interactions blue ball
Mutants/Phenotypes blue ball
Primary Literature blue ball
Protein-protein Interactions blue ball blue ball
Strains/Constructs blue ball
Techniques and Reagents blue ball

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