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Updated: May 20, 2026
08:47
Monitoring eIF4F Assembly by Measuring eIF4E-eIF4G Interaction in Live Cells
Published on: May 1, 2020
A novel 4EHP-GIGYF2 translational repressor complex is essential for mammalian development
Masahiro Morita1, Lian Wee Ler, Marc R Fabian
1Department of Biochemistry and Goodman Cancer Research Centre, McGill University, Montréal, Quebec, Canada.
Molecular and Cellular Biology
|July 4, 2012
Summary
The mammalian 4EHP (m4EHP) protein complex, including GIGYF2, represses mRNA translation. Disruption of this complex causes increased translation and perinatal lethality in mice, highlighting its role in development.
Area of Science:
- Molecular Biology
- Developmental Biology
- Genetics
Background:
- The eukaryotic initiation factor 4E (eIF4E) controls mRNA translation initiation by binding the mRNA 5' cap.
- In Drosophila, a homologous protein (d4EHP) represses translation by competing with eIF4E, crucial for embryonic development.
Purpose of the Study:
- To elucidate the physiological role of mammalian 4EHP (m4EHP) in translation regulation and embryonic development.
- To identify m4EHP binding partners and characterize their function.
Main Methods:
- Co-immunoprecipitation to identify m4EHP complex components.
- Analysis of m4EHP-GIGYF2 complex disruption in mice.
- Assessment of mRNA translation rates and embryonic lethality.
Main Results:
- Grb10-interacting GYF protein 2 (GIGYF2) and zinc finger protein 598 (ZNF598) were identified as m4EHP complex components.
- GIGYF2 directly interacts with m4EHP, stabilizing both proteins.
- Disruption of the m4EHP-GIGYF2 complex resulted in increased mRNA translation and perinatal lethality in mice.
Conclusions:
- The m4EHP-GIGYF2 complex acts as a translational repressor for specific mRNAs during mouse embryonic development.
- This mechanism is analogous to the function of d4EHP in Drosophila, suggesting conserved roles in development.
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