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eIF4E and Interactors from Unicellular Eukaryotes.

Daniela Ross-Kaschitza1, Michael Altmann1

  • 1Institut für Biochemie und Molekulare Medizin (IBMM), University of Bern, 3012 Bern, Switzerland.

International Journal of Molecular Sciences
|April 5, 2020
PubMed
Summary
This summary is machine-generated.

This review explores eukaryotic translation initiation factor 4E (eIF4E) and its partners in unicellular organisms. It highlights evolutionary adaptations in eIF4E forms and interactors across yeasts, parasites, and dinoflagellates for cap-dependent translation.

Keywords:
eIF4EeIF4E-interactorsprotozoan parasitestranslationyeast

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Area of Science:

  • Molecular Biology
  • Evolutionary Biology
  • Microbiology

Background:

  • eIF4E is a key protein in eukaryotic translation, facilitating mRNA-ribosome interaction for cap-dependent translation.
  • This review focuses on the diverse roles and forms of eIF4E and its associated proteins in unicellular eukaryotes.
  • Unicellular organisms exhibit unique evolutionary strategies for regulating translation initiation.

Purpose of the Study:

  • To review the structure and function of eIF4E and its interactors in various unicellular organisms, including yeasts, trypanosomatids, and dinoflagellates.
  • To explore the evolutionary adaptations of cap-dependent translation mechanisms in different microbial lineages.
  • To identify species-specific eIF4E forms and interacting proteins that influence translation regulation.

Main Methods:

  • Literature review of existing research on eIF4E and its interactors in unicellular eukaryotes.
  • Comparative analysis of eIF4E structures and functions across different microbial groups.
  • Examination of identified eIF4E-interacting proteins and their roles in specific organisms.

Main Results:

  • Yeasts like Saccharomyces cerevisiae and Candida albicans possess unique eIF4E interactors, p20 and Eap1.
  • Trypanosomatids utilize stage-specific eIF4Es and eIF4Gs, alongside a unique cap4 mRNA structure.
  • Leishmania major has an eIF4E-interacting protein crucial for developmental stage transitions; dinoflagellates show diverse eIF4Es with limited functional data.

Conclusions:

  • Evolution has shaped diverse eIF4E forms and interaction strategies to meet the specific translational requirements of unicellular organisms.
  • Species-specific adaptations in eIF4E pathways underscore the flexibility of cap-dependent translation.
  • Further research is needed to fully elucidate the functions of diverse eIF4Es, particularly in dinoflagellates.