Rabbit anti-Human JAK3 Polyclonal Antibody

Uniprot Id

P52333

Target Species

Human

Target Name

JAK3

Target Full Name

Tyrosine-protein kinase JAK3

Target Function

Non-receptor tyrosine kinase involved in various processes such as cell growth, development, or differentiation. Mediates essential signaling events in both innate and adaptive immunity and plays a crucial role in hematopoiesis during T-cells development. In the cytoplasm, plays a pivotal role in signal transduction via its association with type I receptors sharing the common subunit gamma such as IL2R, IL4R, IL7R, IL9R, IL15R and IL21R. Following ligand binding to cell surface receptors, phosphorylates specific tyrosine residues on the cytoplasmic tails of the receptor, creating docking sites for STATs proteins. Subsequently, phosphorylates the STATs proteins once they are recruited to the receptor. Phosphorylated STATs then form homodimer or heterodimers and translocate to the nucleus to activate gene transcription. For example, upon IL2R activation by IL2, JAK1 and JAK3 molecules bind to IL2R beta (IL2RB) and gamma chain (IL2RG) subunits inducing the tyrosine phosphorylation of both receptor subunits on their cytoplasmic domain. Then, STAT5A AND STAT5B are recruited, phosphorylated and activated by JAK1 and JAK3. Once activated, dimerized STAT5 translocates to the nucleus and promotes the transcription of specific target genes in a cytokine-specific fashion.

Target Involvement

Severe combined immunodeficiency autosomal recessive T-cell-negative/B-cell-positive/NK-cell-negative (T(-)B(+)NK(-) SCID)

Target Subcellular Location

Endomembrane system; Peripheral membrane protein. Cytoplasm.

Target Protein Families

Protein kinase superfamily, Tyr protein kinase family, JAK subfamily

Target Tissue Specificity

In 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.

Target Synonyms

EC 2.7.10.2; JAK 3; JAK L; JAK-3; Jak3; JAK3 HUMAN; JAK3_HUMAN; JAKL; Janus kinase 3 (a protein tyrosine kinase; leukocyte); Janus kinase 3; Janus Kinase3; L JAK; L-JAK; Leukocyte janus kinase; LJAK; Protein tyrosine kinase leukocyte; Tyrosine protein kinase JAK3; Tyrosine-protein kinase JAK3

Target Background

The protein encoded by this gene is a member of the Janus kinase (JAK) family of tyrosine kinases involved in cytokine receptor-mediated intracellular signal transduction. It is predominantly expressed in immune cells and transduces a signal in response to its activation via tyrosine phosphorylation by interleukin receptors. Mutations in this gene are associated with autosomal SCID (severe combined immunodeficiency disease).