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EIF5A mediates autophagy via translation of ATG3.

Lisa B Frankel
Published in: Autophagy (2018)
The core macroautophagy/autophagy machinery consists of a large group of autophagy-related (ATG) proteins, that mediate highly controlled, step-wise execution of this conserved intracellular degradation process. Whereas ATG proteins have been intensely studied in terms of protein interactions, post-translational modifications and transcriptional regulation, the mechanisms ensuring efficient translation of ATG proteins are not well understood. In a recent study, we describe an evolutionarily conserved role for EIF5A (eukaryotic translation initiation factor 5A) in autophagy. We demonstrate that EIF5A mediates Atg8-family protein lipidation and autophagosome formation via translation of the E2-like ATG3 protein. Moreover, we identify a particular motif in ATG3 causing EIF5A-dependency for its efficient translation.
Keyphrases
  • cell death
  • endoplasmic reticulum stress
  • signaling pathway
  • oxidative stress
  • transcription factor
  • protein protein