Upstream / Downstream


Explore pathways related to this product.


Find answers on our FAQs page.


PhosphoSitePlus® Resource

  • Additional protein information
  • Analytical tools


We recommend the following alternatives

W IP         H M R Mk
100-110 Rabbit

Product Usage Information

Storage: Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at –20°C. Do not aliquot the antibody.

Specificity / Sensitivity

Atg9A Antibody recognizes endogenous levels of total Atg9A protein.

Source / Purification

Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Gly780 of human Atg9A protein. Antibodies are purified by protein A and peptide affinity chromatography.

Autophagy is a catabolic process for the autophagosomic-lysosomal degradation of bulk cytoplasmic contents (1,2). It is generally activated by conditions of nutrient deprivation but is also 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 is directed by a number of autophagy-related (Atg) genes (4).

Atg9, one of the Atg proteins identified in yeast, is essential for autophagosome formation (5). There are two human functional orthologues based on the yeast homolog Atg9p: Atg9A, which has also been identified as Atg9L1 and mAtg9, and Atg9L2, which was first reported as nitric-oxide synthase 3 antisense (NOS3AS) (6,7). Atg9A is an integral membrane protein that is required for both the initiation and the expansion of the autophagosome (6,7). Recruitment of Atg9A to the autophagosomal membrane is dynamic and transient as Atg9A also cycles between autophagy-related structures known as omegasomes, the trans-Golgi network (TGN), and endosomes, and at no point becomes a stable component of the autophagosomal membrane (6,8). The precise regulation of Atg9A trafficking is not fully clarified, yet it is suggested to involve p38 mitogen-activated protein kinase (MAPK)-binding protein p38IP and the Beclin-1-binding protein Bif-1 (9,10).

1.  Reggiori, F. and Klionsky, D.J. (2002) Eukaryot Cell 1, 11-21.

2.  Codogno, P. and Meijer, A.J. (2005) Cell Death Differ. 12 Suppl 2, 1509-18.

3.  Levine, B. and Yuan, J. (2005) J. Clin. Invest. 115, 2679-88.

4.  Klionsky, D.J. et al. (2003) Dev Cell 5, 539-45.

5.  Noda, T. et al. (2000) J Cell Biol 148, 465-80.

6.  Young, A.R. et al. (2006) J Cell Sci 119, 3888-900.

7.  Yamada, T. et al. (2005) J Biol Chem 280, 18283-90.

8.  Orsi, A. et al. (2012) Mol Biol Cell 23, 1860-73.

9.  Webber, J.L. and Tooze, S.A. (2010) EMBO J 29, 27-40.

10.  Takahashi, Y. et al. (2011) Autophagy 7, 61-73.

Entrez-Gene Id 79065
Swiss-Prot Acc. Q7Z3C6

For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.

Atg9A Antibody