Cited by 90Autophagy in Disease and TherapyFungal and yeast genetics researchGenetics, Aging, and Longevity in Model Organisms

Aup1-mediated regulation of Rtg3 during mitophagy

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Journo, Dikla, Mor, Angelika, Abeliovich, Hagai·2009·Journal of Biological Chemistry

Abstract

Mitophagy is an autophagic process that degrades mitochondria by an intracellular engulfment that leads to their delivery into the lumen of the cell's hydrolytic compartment, such as the lysosome in animal cells or the vacuole in yeast. It is hypothesized that such processes serve a quality control function to prevent or slow the accumulation of malfunctioning mitochondria, which are thought in turn to underlie central aspects of the aging process in eukaryotic organisms. We recently identified a conserved mitochondrial protein phosphatase homolog, Aup1, which is required for efficient stationary phase mitophagy in yeast. In the present report, we demonstrate that the retrograde signaling pathway (RTG) is defective in aup1Delta mutants. In agreement with a role for Aup1 in the regulation of the RTG pathway, we find that deletion of RTG3, a transcription factor that mediates the RTG response, causes a defect in stationary phase mitophagy and that deletion of AUP1 leads to changes in Rtg3 phosphorylation patterns under these conditions. In addition, we find that mitophagic conditions lead to induction of RTG pathway target genes in an Aup1-dependent fashion. Thus, our results suggest that the function of Aup1 in mitophagy could be explained through its regulation of Rtg3-dependent transcription.

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  1. Xie, M. W., Jin, F., Hwang, H., Hwang, S., Anand, V., Duncan, M. C., and Huang, J. (2005) Proc. Natl. Acad. Sci. U.S.A. 102, 7215-7220
  2. Kunkel, T. A. (1985) Proc. Natl. Acad. Sci. U.S.A. 82, 488 -492

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Authors
Journo, D., Mor, A., & Abeliovich, H.
Affiliations
Hebrew University of Jerusalem (IL)
Corresponding author
Abeliovich, Hagai
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2009-12
Volume
284
Issue
51
Pages
35885-35895
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2006985224
Cited by
90
References
60
Citations by year
2026: 1 · 2025: 2 · 2024: 4 · 2023: 5 · 2022: 2 · 2021: 6 · 2019: 5 · 2018: 6 · 2017: 5 · 2016: 7 · 2015: 7 · 2014: 11 · 2013: 9 · 2012: 10
FWCI
4.48
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
mitophagy, transcriptional regulation, mitochondrial quality control, aging, Saccharomyces cerevisiae
MeSH terms
Autophagy, Mitochondria, Phosphoprotein Phosphatases, Phosphorylation, Saccharomyces cerevisiae, Transcription, Genetic, Signal Transduction, Gene Deletion, Saccharomyces cerevisiae Proteins, Basic Helix-Loop-Helix Leucine Zipper Transcription Factors

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