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  • Title: Nuclear protein NP60 regulates p38 MAPK activity.
    Author: Fu J, Yang Z, Wei J, Han J, Gu J.
    Journal: J Cell Sci; 2006 Jan 01; 119(Pt 1):115-23. PubMed ID: 16352664.
    Abstract:
    The activation of p38alpha is mediated by its upstream kinase and associated proteins. Here we identify a new nuclear protein, NP60, which regulates the activation of p38alpha in response to sorbitol treatment. NP60 specifically binds to p38alpha, but not to JNK and ERK, in vitro and in vivo. Co-transfection of NP60 leads to the phosphorylation and activation of p38alpha, and subsequently results in the phosphorylation and activation of activating transcription factor 2. The phosphorylation of p38alpha induced by NP60 requires upstream activity of p38alpha MAP kinase, MAP kinase kinase 6 (MKK6) or MKK4. Our results indicate that NP60 mediates stress activation of p38alpha and regulates p38alpha signaling in a specific way.
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