The DOI matches its Crossref record; 28 of the 28 references it cites were found in a registry or an index.
The Atg12-Atg5 Conjugate Has a Novel E3-like Activity for Protein Lipidation in Autophagy
Open accessAbstract
Autophagy is a bulk degradation process in eukaryotic cells; autophagosomes enclose cytoplasmic components for degradation in the lysosome/vacuole. Autophagosome formation requires two ubiquitin-like conjugation systems, the Atg12 and Atg8 systems, which are tightly associated with expansion of autophagosomal membrane. Previous studies have suggested that there is a hierarchy between these systems; the Atg12 system is located upstream of the Atg8 system in the context of Atg protein organization. However, the concrete molecular relationship is unclear. Here, we show using an in vitro Atg8 conjugation system that the Atg12-Atg5 conjugate, but not unconjugated Atg12 or Atg5, strongly enhances the formation of the other conjugate, Atg8-PE. The Atg12-Atg5 conjugate promotes the transfer of Atg8 from Atg3 to the substrate, phosphatidylethanolamine (PE), by stimulating the activity of Atg3. We also show that the Atg12-Atg5 conjugate interacts with both Atg3 and PE-containing liposomes. These results indicate that the Atg12-Atg5 conjugate is a ubiquitin-protein ligase (E3)-like enzyme for Atg8-PE conjugation reaction, distinctively promoting protein-lipid conjugation.
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“Two ubiquitin-like conjugation systems also contribute to autophagosome formation [23,24,25].”
From LC3-Associated Phagocytosis (LAP): Connections with Host Autophagy (2012) · cites this paper as [25]
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Regulation mechanisms and signaling pathways of autophagy
He, C., & Klionsky, D. J. (2009) · Annual Review of Genetics · doi:10.1146/annurev-genet-102808-114910 · Cited by 3,609
“Atg8 is finally conjugated to the target lipid PE via an amide bond, facilitated by the E3like Atg12–Atg5 conjugate (32,37), although Atg12–Atg5 lacks the conserved HECT or RING domains possessed by typical E3 ligases, and is not essential for conjugation to occur.”
BackgroundThe Role of Atg Proteins in Autophagosome Formation
Mizushima, N., Yoshimori, T., & Ohsumi, Y. (2011) · Annual Review of Cell and Developmental Biology · doi:10.1146/annurev-cellbio-092910-154005 · Cited by 2,978
Self-citationAn Overview of Autophagy: Morphology, Mechanism, and Regulation
Parzych, K. R., & Klionsky, D. J. (2014) · Antioxidants & Redox Signaling · doi:10.1089/ars.2013.5371 · Cited by 2,521
“The Atg12–Atg5 conjugate, which may act as an E3 ligase, facilitates this final step (30, 37, 52).”
BackgroundJung, C. H., Ro, S.-H., Cao, J., Otto, N. M., & Kim, D.-H. (2010) · FEBS Letters · doi:10.1016/j.febslet.2010.01.017 · Cited by 2,090
Mammalian autophagy: core molecular machinery and signaling regulation
Yang, Z., & Klionsky, D. J. (2010) · Current Opinion in Cell Biology · doi:10.1016/j.ceb.2009.11.014 · Cited by 1,956
Metadata
- Authors
- Hanada, T., Noda, N. N., Satomi, Y., Ichimura, Y., Fujioka, Y., Takao, T., Inagaki, F., & Ohsumi, Y.
- Affiliations
- National Institute for Basic Biology (JP)
- Hokkaido University (JP)
- Institute for Protein Research, The University of Osaka (JP)
- Corresponding author
- Ohsumi, Yoshinori
- ORCID
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 2007-12
- Volume
- 282
- Issue
- 52
- Pages
- 37298-37302
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W2040157483
- Semantic Scholar
- ac42037b48b9d80a5e5c15efd2379440ed23b91c
- Cited by
- 1,123
- References
- 28
- Citations by year
- 2026: 31 · 2025: 38 · 2024: 44 · 2023: 55 · 2022: 59 · 2021: 68 · 2020: 75 · 2019: 87 · 2018: 61 · 2017: 54 · 2016: 79 · 2015: 77 · 2014: 64 · 2013: 65 · 2012: 81
- FWCI
- 28.90
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Biological Chemistry (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Tokyo Tech Research Repository (Tokyo Institute of Technology) (submittedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Autophagy in Disease and Therapy
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
- Keywords
- ATG12-ATG5 conjugate, protein lipidation, E3 ubiquitin ligase activity, autophagy, ATG3, ATG12, ATG8, phosphatidylethanolamine, autophagosome formation, liposome binding
- MeSH terms
- Autophagy-Related Protein 5, Autophagy-Related Protein 12, Autophagy, Escherichia coli, Lipids, Liposomes, Models, Biological, Protein Processing, Post-Translational, Saccharomyces cerevisiae, Time Factors, Gene Expression Regulation, Fungal, Ubiquitin, Saccharomyces cerevisiae Proteins, Ubiquitin-Protein Ligases
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