Title |
Organization of the Pre-autophagosomal Structure Responsible for Autophagosome Formation
|
---|---|
Published in |
Molecular Biology of the Cell, February 2008
|
DOI | 10.1091/mbc.e07-10-1048 |
Pubmed ID | |
Authors |
Tomoko Kawamata, Yoshiaki Kamada, Yukiko Kabeya, Takayuki Sekito, Yoshinori Ohsumi |
Abstract |
Autophagy induced by nutrient depletion is involved in survival during starvation conditions. In addition to starvation-induced autophagy, the yeast Saccharomyces cerevisiae also has a constitutive autophagy-like system, the Cvt pathway. Among 31 autophagy-related (Atg) proteins, the function of Atg17, Atg29, and Atg31 is required specifically for autophagy. In this study, we investigated the role of autophagy-specific (i.e., non-Cvt) proteins under autophagy-inducing conditions. For this purpose, we used atg11Delta cells in which the Cvt pathway is abrogated. The autophagy-unique proteins are required for the localization of Atg proteins to the pre-autophagosomal structure (PAS), the putative site for autophagosome formation, under starvation condition. It is likely that these Atg proteins function as a ternary complex, because Atg29 and Atg31 bind to Atg17. The Atg1 kinase complex (Atg1-Atg13) is also essential for recruitment of Atg proteins to the PAS. The assembly of Atg proteins to the PAS is observed only under autophagy-inducing conditions, indicating that this structure is specifically involved in autophagosome formation. Our results suggest that Atg1 complex and the autophagy-unique Atg proteins cooperatively organize the PAS in response to starvation signals. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Hungary | 1 | <1% |
Germany | 1 | <1% |
Austria | 1 | <1% |
Brazil | 1 | <1% |
Finland | 1 | <1% |
United Kingdom | 1 | <1% |
Belgium | 1 | <1% |
United States | 1 | <1% |
Unknown | 171 | 96% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 48 | 27% |
Student > Master | 31 | 17% |
Researcher | 18 | 10% |
Student > Bachelor | 17 | 9% |
Student > Doctoral Student | 7 | 4% |
Other | 16 | 9% |
Unknown | 42 | 23% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 69 | 39% |
Biochemistry, Genetics and Molecular Biology | 45 | 25% |
Medicine and Dentistry | 7 | 4% |
Pharmacology, Toxicology and Pharmaceutical Science | 3 | 2% |
Unspecified | 2 | 1% |
Other | 8 | 4% |
Unknown | 45 | 25% |