• Nature
  • Source
    Baculovirus infected Sf9 cells
  • Amino Acid Sequence
    • Species
    • Amino acids
      1 to 311

Associated products


Our Abpromise guarantee covers the use of ab51413 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

  • Biological activity
    Specific activity 265 nmol/min/mg.
  • Applications

    Functional Studies


  • Form
  • Additional notes

    ab204875 (PKC epsilon peptide) can be utilized as a substrate for assessing kinase activity

  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped on dry ice. Upon delivery aliquot and store at -80ºC. Avoid freeze / thaw cycles.

    pH: 7.50
    Constituents: 0.87% Sodium chloride, 25% Glycerol, 0.00292% EDTA, 0.79% Tris HCl, 0.00385% DTT, 0.00174% PMSF, 0.0038% EGTA

    This product is an active protein and may elicit a biological response in vivo, handle with caution.

General Info

  • Alternative names
    • epididymis secretory protein Li 95
    • HEL-S-95
    • Mammalian STE20 like protein kinase 3
    • Mammalian STE20-like protein kinase 3
    • Mammalian STE20-like protein kinase 3 C-terminal
    • Mammalian STE20-like protein kinase 3 N-terminal
    • Mammalian sterile 20-like 3
    • MST-3
    • MST3/C
    • MST3/N
    • MST3B
    • serine threonine kinase 24
    • Serine/threonine kinase 24 (Ste20, yeast homolog)
    • Serine/threonine-protein kinase 24
    • Serine/threonine-protein kinase 24 12 kDa subunit
    • STE20 homolog yeast
    • STE20 like kinase MST3
    • STE20-like kinase MST3
    • Stk24
    • STK24_HUMAN
    • STK3
    see all
  • Function
    Serine/threonine-protein kinase that acts on both serine and threonine residues and promotes apoptosis in response to stress stimuli and caspase activation. Mediates oxidative-stress-induced cell death by modulating phosphorylation of JNK1-JNK2 (MAPK8 and MAPK9), p38 (MAPK11, MAPK12, MAPK13 and MAPK14) during oxidative stress. Plays a role in a staurosporine-induced caspase-independent apoptotic pathway by regulating the nuclear translocation of AIFM1 and ENDOG and the DNase activity associated with ENDOG. Phosphorylates STK38L on 'Thr-442' and stimulates its kinase activity. Regulates cellular migration with alteration of PTPN12 activity and PXN phosphorylation: phosphorylates PTPN12 and inhibits its activity and may regulate PXN phosphorylation through PTPN12. May act as a key regulator of axon regeneration in the optic nerve and radial nerve.
  • Tissue specificity
    Isoform A is ubiquitous. Isoform B is expressed in brain with high expression in hippocampus and cerebral cortex.
  • Sequence similarities
    Belongs to the protein kinase superfamily. STE Ser/Thr protein kinase family. STE20 subfamily.
    Contains 1 protein kinase domain.
  • Post-translational
    Proteolytically processed by caspases during apoptosis. Proteolytic cleavage results in kinase activation, nuclear translocation of the truncated form (MST3/N) and the induction of apoptosis.
    Isoform B is activated by phosphorylation by PKA. Oxidative stress induces phosphorylation. Activated by autophosphorylation at Thr-190 and phosphorylation at this site is essential for its function. Manganese, magnesium and cobalt-dependent autophosphorylation is mainly on threonine residues while zinc-dependent autophosphorylation is on both serine and threonine residues.
  • Cellular localization
    Cytoplasm. Nucleus. Membrane. The truncated form (MST3/N) translocates to the nucleus. Co-localizes with STK38L in the membrane.
  • Information by UniProt


  • Kinase activity assay - specific activity 265 nmol/min/mg.
  • Molecular weight 63 kDa


ab51413 has not yet been referenced specifically in any publications.

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