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ATG4B Antibody

Peptide Affinity Purified Rabbit Polyclonal Antibody (Pab)

  • WB - ATG4B Antibody AP1809d
    Western blot analysis of APG4B (arrow) using purified Pab (Cat.#AP1809d). 293 cell lysates (2 ug/lane) either nontransfected (Lane 1) or transiently transfected with the APG4B gene (Lane 2) (Origene Technologies).
  • IHC-P - ATG4B Antibody AP1809d
    Formalin-fixed and paraffin-embedded human skeletal muscle reacted with Autophagy APG4B Antibody (E273)(Cat.#AP1809d), which was peroxidase-conjugated to the secondary antibody, followed by DAB staining. This data demonstrates the use of this antibody for immunohistochemistry; clinical relevance has not been evaluated.
Product Information
  • Applications Legend:
  • WB=Western Blot
  • IHC=Immunohistochemistry
  • IHC-P=Immunohistochemistry (Paraffin-embedded Sections)
  • IHC-F=Immunohistochemistry (Frozen Sections)
  • IF=Immunofluorescence
  • FC=Flow Cytopmetry
  • IC=Immunochemistry
  • ICC=Immunocytochemistry
  • IP=Immunoprecipitation
  • DB=Dot Blot
  • CHIP=Chromatin Immunoprecipitation
  • FA=Fluorescence Assay
  • IEM=Immunoelectronmicroscopy
  • EIA=Enzyme Immunoassay
Primary Accession Q9Y4P1
Other Accession Q8BGE6, Q6DG88, Q6PZ02, Q6PZ03
Reactivity Human
Predicted Bovine, Chicken, Zebrafish, Mouse
Host Rabbit
Clonality Polyclonal
Isotype Rabbit Ig
Calculated MW 44294 Da
Antigen Region 258-284 aa
Additional Information
Gene ID 23192
Other Names Cysteine protease ATG4B, 3422-, AUT-like 1 cysteine endopeptidase, Autophagin-1, Autophagy-related cysteine endopeptidase 1, Autophagy-related protein 4 homolog B, hAPG4B, ATG4B, APG4B, AUTL1, KIAA0943
Target/Specificity This ATG4B antibody is generated from rabbits immunized with a KLH conjugated synthetic peptide between 258-284 amino acids from human ATG4B.
Dilution WB~~1:1000
Format Purified polyclonal antibody supplied in PBS with 0.09% (W/V) sodium azide. This antibody is purified through a protein A column, followed by peptide affinity purification.
StorageMaintain refrigerated at 2-8°C for up to 2 weeks. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.
PrecautionsATG4B Antibody is for research use only and not for use in diagnostic or therapeutic procedures.
Protein Information
Name ATG4B
Synonyms APG4B, AUTL1, KIAA0943
Function Cysteine protease required for the cytoplasm to vacuole transport (Cvt) and autophagy. Cleaves the C-terminal amino acid of ATG8 family proteins MAP1LC3, GABARAPL1, GABARAPL2 and GABARAP, to reveal a C-terminal glycine. 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. Has also an activity of delipidating enzyme for the PE-conjugated forms.
Cellular Location Cytoplasm.
Tissue Location Mainly expressed in the skeletal muscle, followed by brain, heart, liver and pancreas
Research Areas
Citations (0)

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Macroautophagy is the major inducible pathway for the general turnover of cytoplasmic constituents in eukaryotic cells, it is also responsible for the degradation of active cytoplasmic enzymes and organelles during nutrient starvation. Macroautophagy involves the formation of double-membrane bound autophagosomes which enclose the cytoplasmic constituent targeted for degradation in a membrane bound structure, which then fuse with the lysosome (or vacuole) releasing a single-membrane bound autophagic bodies which are then degraded within the lysosome (or vacuole). APG4, a cysteine protease required for autophagy, cleaves the C-terminal part of MAP1LC3 to form the activated molecule LC3-I. LC3-I is subsequently conjugated with phosphatidylethanolamine at the C-terminal glycine to form LC3-II, a marker for autophagy via its capacity to bind to autophagosomes.


Tanida, I., et al., J. Biol. Chem. 279(35):36268-36276 (2004).
Marino, G., et al., J. Biol. Chem. 278(6):3671-3678 (2003).
Kabeya, Y., et al., J. Cell. Sci. 117 (Pt 13), 2805-2812 (2004) (): ().

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Cat# AP1809d
(40 western blots)
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