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PhosphoPlus® Atg13 (Ser355) Antibody Duet
Primary Antibodies
Antibody Duet

PhosphoPlus® Atg13 (Ser355) Antibody Duet #36105

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Western blot analysis of extracts from various cell lines using Atg13 (E1Y9V) Rabbit mAb.
Western blot analysis of extracts from A-673 cells, untreated (-) or treated as indicated with the ULK1 inhibitor SBI-0206965 #29089 (50 μM, 2hr; +), Earle's Balanced Salt Solution (EBSS, 2 hr; +), or Torin 1 #14379 (250 nM, 2 hr; +), using Phospho-Atg13 (Ser355) (E4D3T) Rabbit mAb (upper), Atg13 (E1Y9V) Rabbit mAb #13468 (middle), or GAPDH (D16H11) XP® Rabbit mAb #5174 (lower).
Western blot analysis of extracts from 293T cells, mock transfected (-) or transfected with a construct expressing Myc/DDK-tagged full-length human Atg13 (hAtg13-Myc/DDK; +), using Atg13 (E1Y9V) Rabbit mAb (upper) or Myc-Tag (71D10) Rabbit mAb #2278 (lower).
Western blot analysis of extracts from 293T cells, mock transfected (-) or transfected with a construct expressing Myc/DDK-tagged full-length human Atg13 protein (hAtg13-Myc/DDK; +) or mouse ULK1 (mULK1; +), using Phospho-Atg13 (Ser355) (E4D3T) Rabbit mAb (upper) or GAPDH (D16H11) XP® Rabbit mAb #5174 (lower).
Western blot analysis of extracts from HeLa cells, transfected with 100 nM SignalSilence® Control siRNA (Unconjugated) #6568 (-) or SignalSilence® Atg13 siRNA I #12043 (+), using Atg13 (E1Y9V) Rabbit mAb (upper) or β-Actin (D6A8) Rabbit mAb #8457 (lower). The Atg13 (E1Y9V) Rabbit mAb confirms silencing of Atg13 expression, while the β-Actin (D6A8) Rabbit mAb is used as a loading control.
Immunoprecipitation of phospho-Atg13 (Ser355) protein from A-673 cell extracts treated with Torin 1 #14379 (250 nM, 2 hr). Lane 1 is 10% input, lane 2 is Rabbit (DA1E) mAb IgG XP® Isotype Control #3900, and lane 3 is Phospho-Atg13 (Ser355) (E4D3T) Rabbit mAb. Western blot analysis was performed using Phospho-Atg13 (Ser355) (E4D3T) Rabbit mAb. Mouse Anti-rabbit IgG (Conformation Specific) (L27A9) mAb (HRP Conjugate) #5127 was used as a secondary antibody.
Immunoprecipitation of Atg13 from MCF7 cell extracts using Rabbit (DA1E) mAb IgG XP® Isotype control #3900 (lane 2) or Atg13 (E1Y9V) Rabbit mAb (lane 3). Lane 1 is 10% input. Western blot analysis was performed using Atg13 (E1Y9V) Rabbit mAb.
Confocal immunofluorescent analysis of PANC-1 cells, untreated (left) or nutrient-starved with Earle's balanced salt solution (3 hr; right), using Atg13 (E1Y9V) Rabbit mAb (green). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).
To Purchase # 36105
Cat. # Size Qty. Price
1 Kit

Product Includes Quantity Reactivity MW(kDa) Isotype
Phospho-Atg13 (Ser355) (E4D3T) Rabbit mAb 46329 100 µl H M R 72 Rabbit IgG
Atg13 (E1Y9V) Rabbit mAb 13468 100 µl H 72 Rabbit IgG

Product Description

PhosphoPlus® Duets from Cell Signaling Technology (CST) provide a means to assess protein activation status. Each Duet contains an activation-state and total protein antibody to your target of interest. These antibodies have been selected from CST's product offering based upon superior performance in specified applications.


Autophagy is a catabolic process for the autophagosomic-lysosomal degradation of bulk cytoplasmic contents (1,2). Autophagy is generally activated by conditions of nutrient deprivation but has also been associated with a number of physiological processes including development, differentiation, neurodegeneration, infection, and cancer (3). The molecular machinery of autophagy was largely discovered in yeast and referred to as autophagy-related (Atg) genes.

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).


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Limited Uses

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Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.

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