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Girolline is a sequence context-selective modulator of eIF5A activity.

Tilman Schneider-Poetsch1, Yongjun Dang2, Wakana Iwasaki3

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Summary
This summary is machine-generated.

Marine natural product girolline inhibits protein synthesis by selectively modulating translation factor eIF5A, causing ribosome stalling. This reveals eIF5A

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Area of Science:

  • Molecular Biology
  • Marine Natural Products
  • Biochemistry

Background:

  • Natural products are crucial for understanding protein biosynthesis and developing therapeutics.
  • The marine compound girolline is known to inhibit protein synthesis, but its mechanism is unclear.

Purpose of the Study:

  • To elucidate the precise mechanism of action of girolline in protein synthesis.
  • To investigate the role of translation factor eIF5A in protein production and quality control.

Main Methods:

  • Investigated girolline's effect on protein synthesis using biochemical assays.
  • Analyzed girolline's interaction with ribosomes and translation factor eIF5A.
  • Studied the impact of girolline on ribosome stalling and translational progress.

Main Results:

  • Girolline selectively modulates the translation factor eukaryotic initiation factor 5A (eIF5A).
  • Girolline disrupts the ribosome-eIF5A interaction, leading to ribosome stalling, particularly at AAA codons.
  • eIF5A is implicated in ribosome-associated quality control and maintaining translational efficiency.

Conclusions:

  • Girolline acts as a sequence-selective modulator of eIF5A, inhibiting protein synthesis.
  • The study deepens understanding of the interplay between protein production and quality control.
  • Girolline provides a chemical tool for selective gene expression modulation.