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Rabbit Recombinant Monoclonal ATG4A antibody. Suitable for IHC-P, WB and reacts with Human samples. Cited in 12 publications.

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Images

Western blot - Anti-ATG4A antibody [EPR4122] (AB108322), expandable thumbnail
  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-ATG4A antibody [EPR4122] (AB108322), expandable thumbnail
  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-ATG4A antibody [EPR4122] (AB108322), expandable thumbnail
  • Western blot - Anti-ATG4A antibody [EPR4122] (AB108322), expandable thumbnail
  • Western blot - Anti-ATG4A antibody [EPR4122] (AB108322), expandable thumbnail

Publications

Key facts

Isotype
IgG
Host species
Rabbit
Storage buffer

pH: 7.2 - 7.4
Preservative: 0.01% Sodium azide
Constituents: 50% Tissue culture supernatant, 40% Glycerol (glycerin, glycerine), 9% PBS, 0.05% BSA

Form
Liquid
Clonality
Monoclonal

Immunogen

  • The exact immunogen used to generate this antibody is proprietary information.

Reactivity data

Select an application
Product promiseTestedExpectedPredictedNot recommended
IHC-PICC/IFFlow CytWB
Human
Tested
Not recommended
Not recommended
Tested
Mouse
Predicted
Not recommended
Not recommended
Predicted
Rat
Predicted
Not recommended
Not recommended
Predicted

Tested
Tested

Species
Human
Dilution info
1/100 - 1/250
Notes

Perform antigen retrieval.

Perform heat-mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.

Predicted
Predicted

Species
Mouse, Rat
Dilution info
-
Notes

-

Not recommended
Not recommended

Species
Human, Mouse, Rat
Dilution info
-
Notes

-

Not recommended
Not recommended

Species
Human, Mouse, Rat
Dilution info
-
Notes

-

Tested
Tested

Species
Human
Dilution info
1/1000 - 1/10000
Notes

-

Predicted
Predicted

Species
Mouse, Rat
Dilution info
-
Notes

-

Target data

Function

Cysteine protease that plays a key role in autophagy by mediating both proteolytic activation and delipidation of ATG8 family proteins (PubMed:12473658, PubMed:15169837, PubMed:17347651, PubMed:21177865, PubMed:21245471, PubMed:22302004, PubMed:32732290). The protease activity is required for proteolytic activation of ATG8 family proteins: cleaves the C-terminal amino acid of ATG8 proteins to reveal a C-terminal glycine (PubMed:12473658, PubMed:15169837, PubMed:17347651, PubMed:21177865, PubMed:21245471, PubMed:22302004). Exposure of the glycine at the C-terminus is essential for ATG8 proteins conjugation to phosphatidylethanolamine (PE) and insertion to membranes, which is necessary for autophagy (PubMed:12473658, PubMed:15169837, PubMed:17347651, PubMed:21177865, PubMed:21245471, PubMed:22302004). Preferred substrate is GABARAPL2 followed by MAP1LC3A and GABARAP (PubMed:12473658, PubMed:15169837, PubMed:17347651, PubMed:21177865, PubMed:21245471, PubMed:22302004). Protease activity is also required to counteract formation of high-molecular weight conjugates of ATG8 proteins (ATG8ylation): acts as a deubiquitinating-like enzyme that removes ATG8 conjugated to other proteins, such as ATG3 (PubMed:31315929, PubMed:33773106). In addition to the protease activity, also mediates delipidation of ATG8 family proteins (PubMed:29458288, PubMed:33909989). Catalyzes delipidation of PE-conjugated forms of ATG8 proteins during macroautophagy (PubMed:29458288, PubMed:33909989). Compared to ATG4B, the major protein for proteolytic activation of ATG8 proteins, shows weaker ability to cleave the C-terminal amino acid of ATG8 proteins, while it displays stronger delipidation activity (PubMed:29458288). Involved in phagophore growth during mitophagy independently of its protease activity and of ATG8 proteins: acts by regulating ATG9A trafficking to mitochondria and promoting phagophore-endoplasmic reticulum contacts during the lipid transfer phase of mitophagy (PubMed:33773106).

Alternative names

Recommended products

Rabbit Recombinant Monoclonal ATG4A antibody. Suitable for IHC-P, WB and reacts with Human samples. Cited in 12 publications.

Key facts

Isotype
IgG
Form
Liquid
Clonality
Monoclonal
Immunogen
  • The exact immunogen used to generate this antibody is proprietary information.
Clone number
EPR4122
Purity
Tissue culture supernatant
Concentration
Loading...

Storage

Shipped at conditions
Blue Ice
Appropriate short-term storage conditions
+4°C
Appropriate long-term storage conditions
-20°C
Storage information
Stable for 12 months at -20°C

Notes

Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb® patents.

This product is a recombinant monoclonal antibody, which offers several advantages including:

  • - High batch-to-batch consistency and reproducibility
  • - Improved sensitivity and specificity
  • - Long-term security of supply
  • - Animal-free batch production

For more information, read more on recombinant antibodies.

Supplementary info

This supplementary information is collated from multiple sources and compiled automatically.
Activity summary

ATG4A also known as Autophagin 1 is a cysteine protease with a mass of approximately 52 kDa. It plays a critical role in the autophagy pathway by cleaving LC3 and other Atg8 homologs facilitating their conjugation to phosphatidylethanolamine on the autophagosome membrane. This protein is expressed in various tissues including the liver and skeletal muscle indicating its involvement in diverse physiological processes.

Biological function summary

ATG4A contributes essential functions to cellular homeostasis by participating in autophagosome formation. As part of the group of Atg proteins it collaborates with other members to modulate the autophagy machinery. ATG4A's enzymatic activity provides the necessary steps for processing LC3 transforming it into a form that allows lipidation and incorporation into autophagic vesicles.

Pathways

ATG4A is integral to the autophagy pathway a catabolic process important for cell survival under stress conditions. It interacts with proteins such as ATG7 and ATG3 within this pathway playing a significant role in the early stages of autophagosome maturation. The interactions ensure proper recycling of cellular materials and its efficient function impact cellular metabolism and stress responses.

Associated diseases and disorders

Disruptions in ATG4A function have been linked to neurodegenerative diseases and cancer. Aberrant autophagy processes involving ATG4A can lead to protein aggregation disorders such as Alzheimer’s disease where proper proteostasis is compromised. Also in certain cancers altered ATG4A activity can influence tumor growth often through modulation of metabolic pathways and interactions with proteins like Beclin 1 which regulate autophagic responses.

Product promise

We are dedicated to supporting your work with high quality reagents and we are here for you every step of the way should you need us.

In the unlikely event of one of our products not working as expected, you are covered by our product promise.

Full details and terms and conditions can be found here:
Terms & Conditions.

5 product images

  • Western blot - Anti-ATG4A antibody [EPR4122] (ab108322), expandable thumbnail

    Western blot - Anti-ATG4A antibody [EPR4122] (ab108322)

    Lanes 1 - 4: Merged signal (red and green). Green - ab108322 observed at 45 kDa. Red - loading control Anti-GAPDH antibody [6C5] - Loading Control ab8245 (Mouse anti-GAPDH antibody [6C5]) observed at 37 kDa.

    ab108322 was shown to react with ATG4A in wild-type HeLa cells in Western blot with loss of signal observed in ATG4A knockout cell line Human ATG4A knockout HeLa cell line ab265738 (ATG4A knockout cell lysate Human ATG4A knockout HeLa cell lysate ab257846). Wild-type HeLa and ATG4A knockout cell lysates were subjected to SDS-PAGE. Membranes were blocked in 3 % milk in TBS-T (0.1 % Tween®) before incubation with ab108322 and Anti-GAPDH antibody [6C5] - Loading Control ab8245 (Mouse anti-GAPDH antibody [6C5]) overnight at 4 °C at a 1 in 1000 dilution and a 1 in 20000 dilution respectively. Blots were incubated with Goat anti-Rabbit IgG H&L (IRDye® 800CW) preabsorbed (Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed ab216773) and Goat anti-Mouse IgG H&L (IRDye® 680RD) preabsorbed (Goat anti-Mouse IgG H&L (IRDye® 680RD) preadsorbed ab216776) secondary antibodies at 1 in 20000 dilution for 1 h at room temperature before imaging.

    All lanes: Western blot - Anti-ATG4A antibody [EPR4122] (ab108322) at 1/1000 dilution

    Lane 1: Wild-type HeLa cell lysate at 20 µg

    Lane 2: ATG4A knockout HeLa cell lysate at 20 µg

    Lane 2: Western blot - Human ATG4A knockout HeLa cell line (Human ATG4A knockout HeLa cell line ab265738)

    Lane 3: HepG2 cell lysate at 20 µg

    Lane 4: Daudi cell lysate at 20 µg

    Performed under reducing conditions.

    Predicted band size: 45 kDa

    Observed band size: 45 kDa

  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-ATG4A antibody [EPR4122] (ab108322), expandable thumbnail

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-ATG4A antibody [EPR4122] (ab108322)

    Immunohistochemical analysis of paraffin-embedded Human brain tissue using ab108322 at 1/100 dilution.

    Perform heat mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.

  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-ATG4A antibody [EPR4122] (ab108322), expandable thumbnail

    Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-ATG4A antibody [EPR4122] (ab108322)

    Immunohistochemical analysis of paraffin-embedded Human skeletal muscle tissue using ab108322 at 1/100 dilution.

    Perform heat mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.

  • Western blot - Anti-ATG4A antibody [EPR4122] (ab108322), expandable thumbnail

    Western blot - Anti-ATG4A antibody [EPR4122] (ab108322)

    All lanes: Western blot - Anti-ATG4A antibody [EPR4122] (ab108322) at 1/1000 dilution

    Lane 1: Fetal liver tissue lysate at 10 µg

    Lane 2: HepG2 cell lysate at 10 µg

    Lane 3: Jurkat cell lysate at 10 µg

    Lane 4: Fetal brain tissue lysate at 10 µg

    Secondary

    All lanes: Standard HRP labelled goat anti-rabbit at 1/2000 dilution

    Predicted band size: 45 kDa

  • Western blot - Anti-ATG4A antibody [EPR4122] (ab108322), expandable thumbnail

    Image collected and cropped by CiteAb under a CC-BY license from the publication

    Western blot - Anti-ATG4A antibody [EPR4122] (ab108322)

    ATG4A western blot using anti-ATG4A antibody [EPR4122] ab108322. Publication image and figure legend from Zhu, K., Yuan, Y., et al., 2020, Aging (Albany NY), PubMed 32302291.


    ab108322 was used in this publication in western blot. This may not be the same as the application(s) guaranteed by Abcam. For a full list of applications guaranteed by Abcam for ab108322 please see the product overview.

    miR-22/miR-142 targets the key autophagy proteins ATG5, ATG4A and ULK1. (A) Predicted miR-142 binding sites in the ULK1, ATG4A, and ATG5 3'UTR. Wild-type and mutant-type ULK1, ATG4A, and ATG5 3'UTR reporter vectors containing wild-type or mutant-type miR-142 binding sites were constructed. (B–D) These vectors were co-transfected into HEK293 cells with miR-142 mimics or inhibitor, and the luciferase activity was determined. (E) Predicted miR-22 binding sites in ULK1. Wild-type and mutant-type ULK1 3'UTR reporter vectors containing wild- or mutant-type miR-22 binding sites were constructed. (F) These vectors were cotransfected into HEK293 cells with miR-22 mimics or inhibitor, and the luciferase activity was determined. (G, H) U2OS cells were transfected with miR-142 mimics in the presence or absence of Dox and examined for the protein levels of ULK1, ATG4A, and ATG5 were examined. (I, J) U2OS cells were transfected with miR-22 mimics in the presence or absence of Dox (5 μM), and the protein levels of ULK1 were examined. The data are presented as the mean ± SD of three independent experiments. *P<0.05, **P<0.01, compared to the control group; ##P<0.01, compared to the Dox group.

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