website statistics

Now Offering Over 102,157 Antibodies & 44,722 Antigens!


The Janus Kinase (Jak)- Signal Transducer and Activator of Transcription (STAT) signaling pathway converts extracellular signals into intracellular action such as cell migration, proliferation, and differentiation. Jak-STAT signaling is an evolutionarily conserved process that allows a cell to respond to a variety of growth and survival signals. There are three critical components of the Jak-STAT signaling pathway: a cytokine receptor, Jak, and STAT.

During Jak-STAT signaling, Jak will bind to a transmembrane cytokine receptor, which, upon ligand binding, will cause Jak to autophosphorylate. Jak phosphorylation encourages the recruitment of STAT molecules that are, in turn, phosphorylated by Jak. STAT molecules then form hetero- or homodimers and translocate to the nucleus to initiate transcription. There are seven different STAT molecules that interact with unique DNA sequences. Activation of Jaks associated with membrane receptors can also act as docking stations for secondary signaling molecules and adaptors that can link the Jak-STAT pathway to MAPK and other signaling pathways. Suppressors of cytokine signaling (SOCS) that compete with STAT binding sites on receptors and protein inhibitors of activated STAT (PIAS) that inhibit STAT binding to DNA negatively regulate the Jak-STAT pathway.

Jak mutations are hallmarks of many haematological malignancies. For instance, mutations in Jak3 that render it constitutively active can cause acute megakaryoblastic leukemia[1]. Similarly, STAT3, which is phosphorylated during IL-6 signaling, can be oncogenic if not properly controlled; STAT3 dysregulation, therefore, can continually promote an anti-apoptotic cellular milieu[2]. Considering the impact of dysregulated Jak-STAT signaling in a variety of diseases, including inflammatory disorders and malignancies, they are currently the focus of therapeutic intervention.  

1. Walters et al. 2006. Activating alleles of JAK3 in acute megakaryoblastic leukemia. Cancer Cell. 10(1):65-75.
2. Sun et al. 2011. Inhibition of Stat3 activation by sanguinarine suppresses prostate cancer cell growth and invasion. Prostate. [epub ahead of print].

  See Related Product List Below Pathway Image

JAKSTAT signaling pathway image by Aviva System Biology


Click here to download PDF and related products

Back To the Top

Page of 6

Showing 1 - 30 of 174
    SPRED2 antibody - C-terminal region (ARP60369_P050) in Human HepG2 using Western Blot

    SPRED2 antibody - C-terminal region (ARP60369_P050)

    Protein Name:Sprouty-related, EVH1 domain-containing protein 2
    Catalog #:ARP60369_P050
    Type: pAb
    Reacts with: Cow, Dog, Guinea Pig, Horse, Human, Mouse, Rabbit, Rat, Zebrafish
    Application: WB
    Product Size: 100 ul
    Price (USD): $289.00
    CCND3 Antibody (OASA02653)

    CCND3 Antibody (OASA02653)

    Protein Name:G1/S-specific cyclin-D3
    Catalog #:OASA02653
    Type: mAb
    Reacts with: Human
    Application: IHC-AFF, IHC-FFPE, WB
    Product Size: 1ml
    Price (USD): $1,130.00
    EPOR Antibody (OASA09061)

    EPOR Antibody (OASA09061)

    Protein Name:Erythropoietin receptor
    Catalog #:OASA09061
    Type: pAb
    Reacts with:
    Application: ELISA, WB
    Product Size: 0.2mg
    Price (USD): $320.00

Page of 6

Showing 1 - 30 of 174