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6604S 300 µl (3 nmol)

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Western blot analysis of extracts from HeLa cells, transfected with 100 nM SignalSilence® Control siRNA (Unconjugated) #6568 (-) or SignalSilence® Atg7 siRNA I (+), using Atg7 Antibody #2631 (upper) or β-Tubulin (9F3) Rabbit mAb #2128 (lower). The Atg7 Antibody confirms silencing of Atg7 expression, while the β-Tubulin (9F3) Rabbit mAb is used as a loading control.

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Product Usage Information

CST recommends transfection with 100 nM Atg7 siRNA I 48 to 72 hours prior to cell lysis. For transfection procedure, follow protocol provided by the transfection reagent manufacturer. Please feel free to contact CST with any questions on use.

Each vial contains the equivalent of 100 transfections, which corresponds to a final siRNA concentration of 100 nM per transfection in a 24-well plate with a total volume of 300 μl per well.


Storage: SignalSilence® siRNA is supplied in RNAse-free water. Aliquot and store at -20ºC.

Product Description

SignalSilence® Atg7 siRNA I from Cell Signaling Technology (CST) allows the researcher to specifically inhibit Atg7 expression using RNA interference, a method whereby gene expression can be selectively silenced through the delivery of double stranded RNA molecules into the cell. All SignalSilence® siRNA products from CST are rigorously tested in-house and have been shown to reduce target protein expression by western analysis.


Quality Control

Oligonucleotide synthesis is monitored base by base through trityl analysis to ensure appropriate coupling efficiency. The oligo is subsequently purified by affinity-solid phase extraction. The annealed RNA duplex is further analyzed by mass spectrometry to verify the exact composition of the duplex. Each lot is compared to the previous lot by mass spectrometry to ensure maximum lot-to-lot consistency.

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. Formation of the autophagosome involves a ubiquitin-like conjugation system in which Atg12 is covalently bound to Atg5 and targeted to autophagosome vesicles (4-6). This conjugation reaction is mediated by the ubiquitin E1-like enzyme Atg7 and the E2-like enzyme Atg10 (7,8).


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

2.  Mizushima, N. et al. (1998) J Biol Chem 273, 33889-92.

3.  Mizushima, N. et al. (1998) Nature 395, 395-8.

4.  Suzuki, K. et al. (2001) EMBO J 20, 5971-81.

5.  Tanida, I. et al. (1999) Mol Biol Cell 10, 1367-79.

6.  Shintani, T. et al. (1999) EMBO J 18, 5234-41.

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

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


Entrez-Gene Id 10533
Swiss-Prot Acc. O95352


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