Subcellular and Subnuclear Distribution of High-Light Responsive Serine/Arginine-Rich Proteins, atSR45a and atSR30, in Arabidopsis thaliana

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  • MORI Tatsuya
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University Department of Advanced Bioscience, Faculty of Agriculture, Kinki University
  • YOSHIMURA Kazuya
    Department of Food and Nutritional Science, College of Bioscience and Biotechnology, Chubu University Department of Food and Nutritional Science, College of Bioscience and Biotechnology, Chubu University
  • NOSAKA Ryota
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University Department of Advanced Bioscience, Faculty of Agriculture, Kinki University
  • SAKUYAMA Harumi
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University Department of Advanced Bioscience, Faculty of Agriculture, Kinki University
  • KOIKE Yoshiyuki
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University Department of Advanced Bioscience, Faculty of Agriculture, Kinki University
  • TANABE Noriaki
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University Department of Advanced Bioscience, Faculty of Agriculture, Kinki University
  • MARUTA Takanori
    Faculty of Life and Environmental Science, Shimane University Faculty of Life and Environmental Science, Shimane University
  • TAMOI Masahiro
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University Department of Advanced Bioscience, Faculty of Agriculture, Kinki University
  • SHIGEOKA Shigeru
    Department of Advanced Bioscience, Faculty of Agriculture, Kinki University Department of Advanced Bioscience, Faculty of Agriculture, Kinki University

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タイトル別名
  • Subcellular and Subnuclear Distribution of High-Light Responsive Serine/Arginine-Rich Proteins, atSR45a and atSR30, in <i>Arabidopsis thaliana</i>

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Here, we demonstrated the involvement of the domains in Arabidopsis high-light responsive serine/arginine-rich (SR) and SR-like proteins, atSR30 and atSR45a, respectively, in subcellular and subnuclear distribution using a series of structural domain-deleted mutants. Judging from the localization of the transiently expressed domain-deleted mutants in onion epidermal cells, the C terminal low complexity domain rich in arginine-serine repeats (C-RS) domain of atSR30 appeared to be necessary for the nuclear localization. On the other hand, the N-terminal RS (N-RS) domain of atSR45a was necessary for the accurate nuclear localization, although the N- or C-RS domain alone was sufficient for the nuclear speckled organization. The phosphorylation of RS domains of atSR45a is irrelevant to the regulation of its localization. atSR45a and atSR30 were co-localized in the speckles, suggesting their collaborative roles in the regulation of alternative splicing events.

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