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Protein quality control by ubiquitin-proteasome system Shigeo Murata 1,2 , Keiji Tanaka 1 1Department of Molecular Oncology, Tokyo Metropolitan Institute of Medical Science 2PRESTO, JST Keyword: ユビキチン , プロテアソーム , 分子シャペロン , タンパク質の品質管理 pp.17-25
Published Date 2004/2/10
DOI https://doi.org/10.11477/mf.1431100175
  • Abstract
  • Look Inside

 Intracellular inclusions of denatured proteins are characteristic features of many neurodegenerative diseases. Since they contain ubiquitinated proteins, it has been suggested that impaired protein metabolism causes these diseases. Cells are equipped with two major mechanisms handling abnormal proteins and maintaining cell homeostasis. One is a series of molecular chaperones, which regenerate damaged proteins into functional state. The other is the the ubiquitin-proteasome system, which catalyzes the immediate destruction of misfolded or impaired proteins generated in cells. These mechanisms play an important role in avoiding toxicity of accumulating abnormal proteins in cells and is called“the protein quality control system.”Failure of this mechanism is assumed to lead to various neurodegenerative disorders.

(Received:September 26, 2003)


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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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