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Rabbit Recombinant Monoclonal ATG4B antibody. Suitable for WB, Flow Cyt (Intra) and reacts with Human, Mouse samples. Cited in 7 publications.


Images

Western blot - Anti-ATG4B antibody [EPR6436(2)] (AB154843), expandable thumbnail
  • Western blot - Anti-ATG4B antibody [EPR6436(2)] (AB154843), expandable thumbnail
  • Western blot - Anti-ATG4B antibody [EPR6436(2)] (AB154843), expandable thumbnail
  • Flow Cytometry (Intracellular) - Anti-ATG4B antibody [EPR6436(2)] (AB154843), 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
IPWBIHC-PICC/IFFlow Cyt (Intra)
Human
Not recommended
Tested
Not recommended
Not recommended
Tested
Mouse
Not recommended
Expected
Not recommended
Not recommended
Expected
Rat
Not recommended
Predicted
Not recommended
Not recommended
Predicted

Not recommended
Not recommended

Species
Mouse, Human, Rat
Dilution info
-
Notes

-

Tested
Tested

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

-

Expected
Expected

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

-

Predicted
Predicted

Species
Rat
Dilution info
-
Notes

-

Not recommended
Not recommended

Species
Mouse, Human, Rat
Dilution info
-
Notes

-

Not recommended
Not recommended

Species
Mouse, Human, Rat
Dilution info
-
Notes

-

Tested
Tested

Species
Human
Dilution info
1/100 - 1/500
Notes

ab172730 - Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody.

Expected
Expected

Species
Mouse
Dilution info
1/100 - 1/500
Notes

ab172730 - Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody.

Predicted
Predicted

Species
Rat
Dilution info
-
Notes

-

Associated Products

Select an associated product type

3 products for Alternative Product

Target data

Function

Cysteine protease that plays a key role in autophagy by mediating both proteolytic activation and delipidation of ATG8 family proteins (PubMed:15169837, PubMed:15187094, PubMed:17347651, PubMed:19322194, PubMed:21177865, PubMed:22302004, PubMed:26378241, PubMed:27527864, PubMed:28633005, PubMed:28821708, PubMed:29232556, PubMed:30076329, PubMed:30443548, PubMed:30661429). Required for canonical autophagy (macroautophagy), non-canonical autophagy as well as for mitophagy (PubMed:33773106, PubMed:33909989). The protease activity is required for proteolytic activation of ATG8 family proteins: cleaves the C-terminal amino acid of ATG8 proteins MAP1LC3A, MAP1LC3B, MAP1LC3C, GABARAPL1, GABARAPL2 and GABARAP, to reveal a C-terminal glycine (PubMed:15169837, PubMed:15187094, PubMed:17347651, PubMed:19322194, PubMed:20818167, PubMed:21177865, PubMed:22302004, PubMed:27527864, PubMed:28287329, PubMed:28633005, PubMed:29458288, PubMed:30661429). 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:15169837, PubMed:15187094, PubMed:17347651, PubMed:19322194, PubMed:21177865, 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:15187094, PubMed:19322194, PubMed:28633005, PubMed:29458288, PubMed:32686895, PubMed:33909989). Catalyzes delipidation of PE-conjugated forms of ATG8 proteins during macroautophagy (PubMed:15187094, PubMed:19322194, PubMed:29458288, PubMed:32686895, PubMed:33909989). Also involved in non-canonical autophagy, a parallel pathway involving conjugation of ATG8 proteins to single membranes at endolysosomal compartments, by catalyzing delipidation of ATG8 proteins conjugated to phosphatidylserine (PS) (PubMed:33909989). Compared to other members of the family (ATG4A, ATG4C or ATG4C), constitutes the major protein for proteolytic activation of ATG8 proteins, while it displays weaker delipidation activity than other ATG4 paralogs (PubMed:29458288, PubMed:30661429). 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

APG4B, AUTL1, KIAA0943, ATG4B, Cysteine protease ATG4B, AUT-like 1 cysteine endopeptidase, Autophagy-related cysteine endopeptidase 1, Autophagy-related protein 4 homolog B, Autophagin-1, HsAPG4B, hAPG4B

Recommended products

Rabbit Recombinant Monoclonal ATG4B antibody. Suitable for WB, Flow Cyt (Intra) and reacts with Human, Mouse samples. Cited in 7 publications.

Key facts

Isotype
IgG
Form
Liquid
Clonality
Monoclonal
Immunogen
  • The exact immunogen used to generate this antibody is proprietary information.
Clone number
EPR6436(2)
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

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

ATG4B is a cysteine protease also known as autophagin-1 with a molecular mass of approximately 45 kDa. It is involved in the autophagy process by cleaving ATG8 family proteins. This protease facilitates the lipidation of LC3 an essential component of the autophagosome membrane. You find ATG4B expressed in various tissues especially in the brain liver and muscle where it plays important roles in cellular maintenance.

Biological function summary

ATG4B functions in the cellular autophagic machinery cleaving the C-terminal of ATG8 proteins. This processing is necessary for the conjugation to phosphatidylethanolamine and integration into autophagosomes. ATG4B is part of a larger autophagic complex that also includes other critical proteins like ATG7 and ATG3 helping prepare ATG8 proteins for autophagosome creation.

Pathways

ATG4B participates in the autophagy pathway by refining the cargo processing mechanism. It interacts with the mTOR signaling pathway which influences cell survival and growth based on nutrient availability. The ATG4B enzyme is closely related to ATG7 in the pathway as both contribute to the maturation of autophagosomes.

Associated diseases and disorders

ATG4B has significant links to cancer and neurodegenerative disorders. In cancer ATG4B activity affects tumor survival since cancer cells exploit autophagy for growth under stress conditions. In neurodegenerative diseases like Alzheimer's alterations in ATG4B activity disrupt cellular homeostasis. This disruption connects to proteins like LC3 which are pivotal in neuron survival and function.

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.

4 product images

  • Western blot - Anti-ATG4B antibody [EPR6436(2)] (ab154843), expandable thumbnail

    Western blot - Anti-ATG4B antibody [EPR6436(2)] (ab154843)

    Lanes 1 - 2:Merged signal (red and green). Green - ab154843 observed at 47 kDa. Red - loading control Anti-GAPDH antibody [6C5] - Loading Control ab8245 (Mouse anti-GAPDH antibody [6C5]) observed at 37kDa.
    ab154843 was shown to react with ATG4B in wild-type HeLa cells in Western blot with loss of signal observed in ATG4B knockout cell line ab260973 (ATG4B knockout cell lysate Human ATG4B knockout HeLa cell lysate ab257364). Wild-type and ATG4B knockout HEK293T cell lysates were subjected to SDS-PAGE. Membranes were blocked in 3 % milk in TBS-T (0.1 % Tween®) before incubation with ab154843 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-ATG4B antibody [EPR6436(2)] (ab154843) at 1/1000 dilution

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

    Lane 2: ATG4B knockout HeLa cell lysate at 20 µg

    Lane 2: Western blot - Human ATG4B knockout HeLa cell line (Human ATG4B knockout HeLa cell line ab265814)

    Performed under reducing conditions.

    Predicted band size: 44 kDa

    Observed band size: 47 kDa

  • Western blot - Anti-ATG4B antibody [EPR6436(2)] (ab154843), expandable thumbnail

    Western blot - Anti-ATG4B antibody [EPR6436(2)] (ab154843)

    Lane 1: Wild-type HAP1 cell lysate (20 μg)
    Lane 2: ATG4B knockout HAP1 cell lysate (20 μg)

    Lanes 1 - 2: Merged signal (red and green). Green - ab154843 observed at 47 kDa. Red - loading control, ab18058, observed at 130 kDa.

    ab154843 was shown to specifically react with ATG4B when ATG4B knockout samples were used. Wild-type and ATG4B knockout samples were subjected to SDS-PAGE. ab154843 and ab18058 (loading control to Vinculin) were diluted at 1/1000 and 1/10000 respectively and incubated overnight at 4°C. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed (Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed ab216773) and Goat anti-Mouse IgG H&L (IRDye® 680RD) preadsorbed (Goat anti-Mouse IgG H&L (IRDye® 680RD) preadsorbed ab216776) secondary antibodies at 1/10000 dilution for 1 hour at room temperature before imaging.

    All lanes: Western blot - Anti-ATG4B antibody [EPR6436(2)] (ab154843)

    Predicted band size: 44 kDa

  • Western blot - Anti-ATG4B antibody [EPR6436(2)] (ab154843), expandable thumbnail

    Western blot - Anti-ATG4B antibody [EPR6436(2)] (ab154843)

    All lanes: Western blot - Anti-ATG4B antibody [EPR6436(2)] (ab154843) at 1/1000 dilution

    Lane 1: Ramos cell lysate at 10 µg

    Lane 2: 293T cell lysate at 10 µg

    Lane 3: Jurkat cell lysate at 10 µg

    Lane 4: HeLa cell lysate at 10 µg

    Predicted band size: 44 kDa

  • Flow Cytometry (Intracellular) - Anti-ATG4B antibody [EPR6436(2)] (ab154843), expandable thumbnail

    Flow Cytometry (Intracellular) - Anti-ATG4B antibody [EPR6436(2)] (ab154843)

    Intracellular Flow Cytometry analysis of permeabilized Jurkat cells labeling ATG4B (red), using ab154843 at a 1/100 dilution, and negative control cells probed with a Rabbit IgG (green)

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