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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/13375


    Title: The phosphorylation status of drp1-ser637 by pka in mitochondrial fission modulates mitophagy via pink1/parkin to exert multipolar spindles assembly during mitosis
    Authors: Ko, HJ;Tsai, CY;Chiou, SJ;Lai, YL;Wang, CH;Cheng, JT;Chuang, TH;Huang, CYF;Kwan, AL;Loh, JK;Hong, YR
    Contributors: Immunology Research Center;NHRI Graduate Student Program
    Abstract: Mitochondrial fission and fusion cycles are integrated with cell cycle progression. Here we first re-visited how mitochondrial ETC inhibition disturbed mitosis progression, resulting in multipolar spindles formation in HeLa cells. Inhibitors of ETC complex I (rotenone, ROT) and complex III (antimycin A, AA) decreased the phosphorylation of Plk1 T210 and Aurora A T288 in the mitotic phase (M-phase), especially ROT, affecting the dynamic phosphorylation status of fission protein dynamin-related protein 1 (Drp1) and the Ser637/Ser616 ratio. We then tested whether specific Drp1 inhibitors, Mdivi-1 or Dynasore, affected the dynamic phosphorylation status of Drp1. Similar to the effects of ROT and AA, our results showed that Mdivi-1 but not Dynasore influenced the dynamic phosphorylation status of Ser637 and Ser616 in Drp1, which converged with mitotic kinases (Cdk1, Plk1, Aurora A) and centrosome-associated proteins to significantly accelerate mitotic defects. Moreover, our data also indicated that evoking mito-Drp1-Ser637 by protein kinase A (PKA) rather than Drp1-Ser616 by Cdk1/Cyclin B resulted in mitochondrial fission via the PINK1/Parkin pathway to promote more efficient mitophagy and simultaneously caused multipolar spindles. Collectively, this study is the first to uncover that mito-Drp1-Ser637 by PKA, but not Drp1-Ser616, drives mitophagy to exert multipolar spindles formation during M-phase.
    Date: 2021-03-21
    Relation: Biomolecules. 2021 Mar 21;11(3):Article number 424.
    Link to: http://dx.doi.org/10.3390/biom11030424
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=2218-273X&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000633438400001
    Cited Times(Scopus): https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85102474561
    Appears in Collections:[莊宗顯] 期刊論文
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