Rabbit Recombinant Monoclonal ATG4B antibody. Suitable for WB, Flow Cyt (Intra) and reacts with Human, Mouse samples. Cited in 7 publications.
pH: 7.2 - 7.4
Preservative: 0.01% Sodium azide
Constituents: 50% Tissue culture supernatant, 40% Glycerol (glycerin, glycerine), 9% PBS, 0.05% BSA
IP | WB | IHC-P | ICC/IF | Flow 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 |
Species | Dilution info | Notes |
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Species Mouse, Human, Rat | Dilution info - | Notes - |
Species | Dilution info | Notes |
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Species Human | Dilution info 1/1000 - 1/10000 | Notes - |
Species | Dilution info | Notes |
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Species Mouse | Dilution info 1/1000 - 1/10000 | Notes - |
Species | Dilution info | Notes |
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Species Rat | Dilution info - | Notes - |
Species | Dilution info | Notes |
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Species Mouse, Human, Rat | Dilution info - | Notes - |
Species | Dilution info | Notes |
---|---|---|
Species Mouse, Human, Rat | Dilution info - | Notes - |
Species | Dilution info | Notes |
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Species Human | Dilution info 1/100 - 1/500 | Notes ab172730 - Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody. |
Species | Dilution info | Notes |
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Species Mouse | Dilution info 1/100 - 1/500 | Notes ab172730 - Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody. |
Species | Dilution info | Notes |
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Species Rat | Dilution info - | Notes - |
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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).
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
Rabbit Recombinant Monoclonal ATG4B antibody. Suitable for WB, Flow Cyt (Intra) and reacts with Human, Mouse samples. Cited in 7 publications.
pH: 7.2 - 7.4
Preservative: 0.01% Sodium azide
Constituents: 50% Tissue culture supernatant, 40% Glycerol (glycerin, glycerine), 9% PBS, 0.05% BSA
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:
For more information, read more on recombinant antibodies.
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.
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.
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.
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.
We have tested this species and application combination and it works. It is covered by our product promise.
We have not tested this specific species and application combination in-house, but expect it will work. It is covered by our product promise.
This species and application combination has not been tested, but we predict it will work based on strong homology. However, this combination is not covered by our product promise.
We do not recommend this combination. It is not covered by our product promise.
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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
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
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
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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