JAK1 Protein, active, 10 µg

Janus kinase 1 (JAK1), is a member of a new class of protein-tyrosine kinases (PTK) characterized by the presence of a second phosphotransferase-related domain immediately N-terminal to the PTK domain. The second phosphotransferase domain bears all the hallmarks of a protein kinase, although its structure differs significantly from that of the PTK and threonine/serine kinase family members. JAK1 is a large, widely expressed membrane-associated phosphoprotein. JAK1 is involved in the interferon-alpha/beta and -gamma signal transduction pathways. The reciprocal interdependence between JAK1 and TYK2 activities in the interferon-alpha pathway, and between JAK1 and JAK2 in the interferon-gamma pathway, may reflect a requirement for these kinases in the correct assembly of interferon receptor complexes. These kinases couple cytokine ligand binding to tyrosine phosphorylation of various known signaling proteins and of a unique family of transcription factors termed the signal transducers and activators of transcription, or STATs.

Product Source: N-terminal GST-tagged, recombinant, human JAK1 amino acids 866-end, expressed by baculovirus in Sf21 insect cells. Activated in vitro by auto-phosphorylation.

Research Category
Signaling

Target Sub-Family: TK

Also available in 250μg size as catalog # 14-918M and in bulk as catalog # 14-918-K.

Routinely evaluated by phosphorylation of peptide GEEPLYWSFPAKKK.

50mM Tris/HCl pH7.5, 150mM NaCl, 5mM β-glycerophosphate, 0.5mM sodium orthovanadate, 50% v/v glycerol, 0.02% Triton^™ X-100, 0.5mM EDTA, 2mM DTT. Frozen solution.

Purified using glutathione sepharose.

6 months at -70°C

For Specific Activity data, refer to the Certificate of Analysis for individual lots of this enzyme.

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