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FEBS Lett. 1996 Apr 1;383(3):273-6.

SAP kinase-3, a new member of the family of mammalian stress-activated protein kinases.

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  • 1MRC Laboratory of Molecular Biology, Cambridge, UK.


Stress-activated protein kinases are MAP kinase homologues that are activated by cellular stresses, bacterial endotoxin and inflammatory cytokines. They are activated by a dual threonine/tyrosine phosphorylation within a TPY sequence in the case of stress-activated protein kinase-1 and its isoforms (also called JNKs) or a TGY sequence in the case of stress-activated protein kinase-2 and its isoforms (also called p38, p40, RK, CSBPs, XMpk2 and Mxi2). Here we report the cloning and sequencing of a new protein kinase from rat with a TGY sequence in the activation domain. This stress-activated protein kinase-3 is 60% identical to mouse stress-activated protein kinase-2 and 45% identical to HOG1 from Saccharomyces cerevisiae. Transcripts encoding stress-activated protein kinase-3 are widely expressed, with high levels in skeletal muscle.

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