• NatureRecombinant
  • SourceBaculovirus infected Sf9 cells
  • Amino Acid Sequence
    • SpeciesHuman
    • Amino acids781 to 1124

Associated products


Our Abpromise guarantee covers the use of ab89756 in the following tested applications.

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

  • Biological activityThe Specific activity of ab89756 was determined to be 91 nmol/min/mg.
  • Applications


    Western blot

    Functional Studies

  • FormLiquid
  • Additional notes

    ab204877 (Poly (4:1 Glu, Tyr) 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.

    Preservative: None
    Constituents: 25% Glycerol, 50mM Tris HCl, 150mM Sodium chloride, 0.25mM DTT, 0.1mM EGTA, 0.1mM EDTA, 0.1mM PMSF, pH 7.5

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

General Info

  • Alternative names
    • EC
    • JAK 3
    • JAK L
    • JAK-3
    • Jak3
    • JAK3 HUMAN
    • JAK3_HUMAN
    • JAKL
    • Janus kinase 3
    • Janus kinase 3 (a protein tyrosine kinase, leukocyte)
    • Janus Kinase3
    • L JAK
    • L-JAK
    • Leukocyte janus kinase
    • LJAK
    • Protein tyrosine kinase leukocyte
    • Tyrosine protein kinase JAK3
    • Tyrosine-protein kinase JAK3
    see all
  • FunctionTyrosine kinase of the non-receptor type, involved in the interleukin-2 and interleukin-4 signaling pathway. Phosphorylates STAT6, IRS1, IRS2 and PI3K.
  • Tissue specificityIn NK cells and an NK-like cell line but not in resting T-cells or in other tissues. The S-form is more commonly seen in hematopoietic lines, whereas the B-form is detected in cells both of hematopoietic and epithelial origins.
  • Involvement in diseaseDefects in JAK3 are a cause of severe combined immunodeficiency autosomal recessive T-cell-negative/B-cell-positive/NK-cell-negative (T(-)B(+)NK(-) SCID) [MIM:600802]. A form of severe combined immunodeficiency (SCID), a genetically and clinically heterogeneous group of rare congenital disorders characterized by impairment of both humoral and cell-mediated immunity, leukopenia, and low or absent antibody levels. Patients present in infancy recurrent, persistent infections by opportunistic organisms. The common characteristic of all types of SCID is absence of T-cell-mediated cellular immunity due to a defect in T-cell development.
  • Sequence similaritiesBelongs to the protein kinase superfamily. Tyr protein kinase family. JAK subfamily.
    Contains 1 FERM domain.
    Contains 1 protein kinase domain.
    Contains 1 SH2 domain.
  • DomainPossesses two phosphotransferase domains. The second one probably contains the catalytic domain (By similarity), while the presence of slight differences suggest a different role for domain 1.
  • Post-translational
    Tyrosine phosphorylated in response to IL-2 and IL-4.
  • Cellular localizationEndomembrane system. Wholly intracellular, possibly membrane associated.
  • Information by UniProt

Recombinant human JAK3 protein images

  • Kinase Assay demonstrating specific activity of ab89756.
  • SDS-PAGE showing ab89756 at approximately 64kDa.

References for Recombinant human JAK3 protein (ab89756)

ab89756 has not yet been referenced specifically in any publications.

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