Phospho-Atg13 (Ser355) (E4D3T) Rabbit mAb #46329
- WB
- IP
Supporting Data
| REACTIVITY | H M R |
| SENSITIVITY | Endogenous |
| MW (kDa) | 72 |
| Source/Isotype | Rabbit IgG |
Application Key:
- WB-Western Blotting
- IP-Immunoprecipitation
Species Cross-Reactivity Key:
- H-Human
- M-Mouse
- R-Rat
Product Information
Product Usage Information
| Application | Dilution |
|---|---|
| Western Blotting | 1:1000 |
| Immunoprecipitation | 1:200 |
Storage
Protocol
Specificity / Sensitivity
Species Reactivity:
Source / Purification
Background
Atg13/Apg13 was originally identified in yeast as a constitutively expressed protein that was genetically linked to Atg1/Apg1, a protein kinase required for autophagy (4). Overexpression of Atg1 suppresses the defects in autophagy observed in Atg13 mutants (4). Autophagy requires a direct association between Atg1 and Atg13, and is inhibited by TOR-dependent phosphorylation of Atg13 under high-nutrient conditions (5). Similarly, mammalian Atg13 forms a complex with the Atg1 homologues ULK1/2, along with FIP200, which localizes to autophagic isolation membranes and regulates autophagosome biogenesis (6-8). mTOR phosphorylates both Atg13 and ULK1, suppressing ULK1 kinase activity and autophagy (7-9). ULK1 can directly phosphorylate Atg13 at a yet unidentified site, presumably to promote autophagy (7,8). Additional studies suggest that Atg13 and FIP200 can function independently of ULK1 and ULK2 to induce autophagy through an unknown mechanism (10).
ULK1-dependent phosphorylation of Atg13 at Ser355, which corresponds to Ser318 of isoform 2 of Atg13, leads to the recruitment of Atg13 to damaged mitochondria, enabling efficient mitophagy (11).
- Reggiori, F. and Klionsky, D.J. (2002) Eukaryot Cell 1, 11-21.
- Codogno, P. and Meijer, A.J. (2005) Cell Death Differ 12 Suppl 2, 1509-18.
- Levine, B. and Yuan, J. (2005) J Clin Invest 115, 2679-88.
- Funakoshi, T. et al. (1997) Gene 192, 207-13.
- Kamada, Y. et al. (2000) J Cell Biol 150, 1507-13.
- Ganley, I.G. et al. (2009) J Biol Chem 284, 12297-305.
- Hosokawa, N. et al. (2009) Mol Biol Cell 20, 1981-91.
- Jung, C.H. et al. (2009) Mol Biol Cell 20, 1992-2003.
- Kim, J. et al. (2011) Nat Cell Biol 13, 132-41.
- Alers, S. et al. (2011) Autophagy 7, 1423-33.
- Joo, J.H. et al. (2011) Mol Cell 43, 572-85.
Limited Uses
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