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Structure of the murine Jak2 protein-tyrosine kinase and its role in interleukin 3 signal transduction
Journal article   Open access   Peer reviewed

Structure of the murine Jak2 protein-tyrosine kinase and its role in interleukin 3 signal transduction

Olli Silvennoinen, Bruce A Witthuhn, Frederick W Quelle, John L Cleveland, Taolin Yi and James N Ihle
Proceedings of the National Academy of Sciences - PNAS, Vol.90(18), pp.8429-8433
09/15/1993
DOI: 10.1073/pnas.90.18.8429
PMCID: PMC47370
PMID: 8378315
url
https://doi.org/10.1073/pnas.90.18.8429View
Published (Version of record) Open Access

Abstract

Interleukin 3 (IL-3) regulates the proliferation and differentiation of hematopoietic cells. Although the IL-3 receptor chains lack kinase catalytic domains, IL-3 induces tyrosine phosphorylation of cellular proteins. To investigate the potential role of the JAK family of protein-tyrosine kinases in IL-3 signal transduction, we have obtained full-length cDNA clones for murine Jak1 and Jak2 protein-tyrosine kinases and prepared antiserum against the predicted proteins. Using antisera against Jak2, we demonstrate that IL-3 stimulation results in the rapid and specific tyrosine phosphorylation of Jak2 and activates its in vitro kinase activity.

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