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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/2145


    Title: Caspase activation of mammalian Sterile 20-like kinase 3 (Mst3) - Nuclear translocation and induction of apoptosis
    Authors: Huang, CYF;Wu, YM;Hsu, CY;Lee, WS;Lai, MD;Lu, TJ;Huang, CL;Leu, TH;Shih, HM;Fang, HI;Robinson, DR;Kung, HJ;Yuan, CJ
    Contributors: Division of Molecular and Genomic Medicine
    Abstract: Mammalian Sterile 20-like kinase 3 (Mst3), the physiological functions of which are unknown, is a member of the germinal center kinase-III family. It contains a conserved kinase domain at its NH2 terminus, whereas there is a regulatory domain at its COOH terminus. In this study we demonstrate that endogenous Mst3 is specifically cleaved when Jurkat cells were treated with anti-Fas antibody or staurosporine and that this cleavage is inhibited by the caspase inhibitor, Ac-DEVD-CHO. Using apoptotic Jurkat cell extracts and recombinant caspases, we mapped the caspase cleavage site, AETD(313), which is at the junction of the NH2-terminal kinase domain and the COOH-terminal regulatory domain. Caspase-mediated cleavage of. Mst3 activates its intrinsic kinase activity, suggesting that the COOH-terminal domain of Mst3 negatively regulates the kinase domain. Furthermore, proteolytic removal of the Mst3 COOH-terminal domain by caspases promotes nuclear translocation. Ectopic expression of either wild-type or COOH-terminal truncated Mst3 in cells results in DNA fragmentation and morphological changes characteristic of apoptosis. By contrast, no such changes were exhibited for catalytically inactive Mst3, implicating the involvement of Mst3 kinase activity for mediation of these effects. Collectively, these results support the notion that caspase-mediated proteolytic activation of Mst3 contributes to apoptosis.
    Keywords: Biochemistry & Molecular Biology
    Date: 2002-09-13
    Relation: Journal of Biological Chemistry. 2002 Sep;277(37):34367-34374.
    Link to: http://dx.doi.org/10.1074/jbc.M202468200
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1083-351X&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000177959100109
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0037072882
    Appears in Collections:[施修明] 期刊論文
    [黃奇英(1998-2005)] 期刊論文
    [龔行健] 期刊論文

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