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  • 标题:Constitutive association of the proapoptotic protein Bim with Bcl-2-related proteins on mitochondria in T cells
  • 本地全文:下载
  • 作者:Yanan Zhu ; Bradley J. Swanson ; Michael Wang
  • 期刊名称:Proceedings of the National Academy of Sciences
  • 印刷版ISSN:0027-8424
  • 电子版ISSN:1091-6490
  • 出版年度:2004
  • 卷号:101
  • 期号:20
  • 页码:7681-7686
  • DOI:10.1073/pnas.0402293101
  • 语种:English
  • 出版社:The National Academy of Sciences of the United States of America
  • 摘要:Apoptosis in activated T cells in vivo requires the proapoptotic Bcl-2 family member Bim. We show here that, despite its ability to bind LC8, a component of the microtubule dynein motor complex, most of the Bim in both healthy and apoptotic T cells is associated with mitochondria, not microtubules. In healthy resting T cells Bim is bound to the antiapoptotic proteins Bcl-2 and Bcl-xL. In activated T cells, levels of Bcl-2 fall, and Bim is associated more with Bcl-xL and less with Bcl-2. Our results indicate that, in T cells, Bim function is regulated by interaction with Bcl-2 family members on mitochondria rather than by sequestration to the microtubules.
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