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MEKK5/ASK1 Antibody (N-term)

Rabbit Monoclonal Antibody

  • WB - MEKK5/ASK1 Antibody (N-term) AJ1472b
    A. Western blot analysis on HeLa cell lysate using anti-MEKK5/ASK1 RabMAb (Cat. #AJ1472b), dilution 1:2000
  • IHC - MEKK5/ASK1 Antibody (N-term) AJ1472b
    B. Immunohistochemical analysis of paraffin-embedded human lung carcinoma using anti-MEKK5 RabMAb (Cat. #AJ1472b).
  • IF - MEKK5/ASK1 Antibody (N-term) AJ1472b
    C. Immunofluorescent staining of HeLa cells using anti-MEKK5 RabMAb (Cat. #AJ1472b).
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 Q99683
Reactivity Human, Mouse
Host Rabbit
Clonality Monoclonal
Clone Names EP553Y
Calculated MW 154537 Da
Gene ID 4217
Other Names Mitogen-activated protein kinase kinase kinase 5, Apoptosis signal-regulating kinase 1, ASK-1, MAPK/ERK kinase kinase 5, MEK kinase 5, MEKK 5, MAP3K5, ASK1, MAPKKK5, MEKK5
Target/Specificity A synthetic peptide corresponding to residues in N-terminus of human MEKK5/ASK1 was used as an immunogen.
Dilution WB~~1:5000~20000
Format 50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.
StorageMaintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.
PrecautionsMEKK5/ASK1 Antibody (N-term) is for research use only and not for use in diagnostic or therapeutic procedures.
Protein Information
Name MAP3K5
Synonyms ASK1, MAPKKK5, MEKK5
Function Serine/threonine kinase which acts as an essential component of the MAP kinase signal transduction pathway. Plays an important role in the cascades of cellular responses evoked by changes in the environment. Mediates signaling for determination of cell fate such as differentiation and survival. Plays a crucial role in the apoptosis signal transduction pathway through mitochondria-dependent caspase activation. MAP3K5/ASK1 is required for the innate immune response, which is essential for host defense against a wide range of pathogens. Mediates signal transduction of various stressors like oxidative stress as well as by receptor-mediated inflammatory signals, such as the tumor necrosis factor (TNF) or lipopolysaccharide (LPS). Once activated, acts as an upstream activator of the MKK/JNK signal transduction cascade and the p38 MAPK signal transduction cascade through the phosphorylation and activation of several MAP kinase kinases like MAP2K4/SEK1, MAP2K3/MKK3, MAP2K6/MKK6 and MAP2K7/MKK7. These MAP2Ks in turn activate p38 MAPKs and c-jun N-terminal kinases (JNKs). Both p38 MAPK and JNKs control the transcription factors activator protein-1 (AP-1).
Cellular Location Cytoplasm. Endoplasmic reticulum. Note=Interaction with 14-3-3 proteins alters the distribution of MAP3K5/ASK1 and restricts it to the perinuclear endoplasmic reticulum region
Tissue Location Abundantly expressed in heart and pancreas.
Research Areas
Citations ( 0 )


Apoptosis signal-regulating kinase-1 (ASK1, MEKK5, MAPKKK5) is a MAP3k type protein kinase belonging to mitogen-activated protein kinase kinase kinase (MAPKKK) family. As a regulator of JNK and p38 MAPK signaling pathways, ASK1/MEKK5 phosphorylates MMK4 to activate c-Jun N-terminal kinase (JNK) and phosphorylates MEK3 and MKK6 to activate p38. ASK1/MEKK5 is activated by oxidative stress, TNF via TRAF2, Fas via Daxx, calcium overload, and endoplasmic reticulum stress (1). ASK1/MEKK5 is inactivated by Trx, Grx, 14-3-3, and protein serine/threonine phosphatase 5 (2). While elevated level of ASK1/MEKK5 can induce apoptosis, a catalytically inactive ASK1/MEKK5 acts as an inhibitor in TNF-alpha induced apoptosis. Over-expression of ASK1/MEKK5 has also been implicated in cell differentiation, such as in keratinocyte differentiation through p38 pathway (3). ASK1/MEKK5 has been implicated as a therapeutic target for neurodegenerative disorder sand cardiac dysfunction (4)


1. Ichijo H, et al. Science 275:90-94, 1997
2. Cho S, et al. JBC 279:16050-16056, 2004.
3. Sayama K, et al. JBC 276:999-1004, 2001.
4. Matsukawa J, et al. J. Biochem 3:261-265, 2004.

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Cat# AJ1472b
(40 western blots)
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