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Intercellular Trafficking of Homeodomain Proteins

  • Kim, Seon-Won (Department of Food Science & Nutrition, Division of Applied Life Science (BK21), Gyeongsang National University) ;
  • Moon, Jun-Yeon (Division of Applied Life Science (BK21), Gyeongsang National University) ;
  • Jung, Jin-Hee (Division of Applied Life Science (BK21), Gyeongsang National University) ;
  • Chen, Xiongyan (Division of Applied Life Science (BK21), Gyeongsang National University) ;
  • Shi, Chunlin (Division of Applied Life Science (BK21), Gyeongsang National University) ;
  • Rim, Yeong-Gil (Environmental Biotechnology National Core Research Center, Gyeongsang National University) ;
  • Kwon, Hey-Jin (Environmental Biotechnology National Core Research Center, Gyeongsang National University) ;
  • Jackson, David (Cold Spring Habor Laboratory) ;
  • Datla, Raju (Plant Biotechnology Institute, National Research Council of Canada) ;
  • Joliot, Alain (Biologie cellulaire des hom$\'{e}$prot$\'{e}$ines) ;
  • Kim, Jae-Yean (Division of Applied Life Science (BK21), Plant Molecular Biology & Biotechnology Research Center, Environmental Biotechnology National Core Research Center, Gyeongsang National University)
  • Published : 2005.01.01

Abstract

Homeotic proteins have pivotal roles during the development of both plant and animals. Many homeotic proteins exert control over cell fate in cells where their genes are not expressed, i.e., in a non-cell autonomous manner. Cell-to-cell communication, which delivers critical information for position-dependent specification of cell fate, is an essential biological process in multicellular organisms. In plants, there are two pathways for intercellular communication that have been identified: the ligand/receptor-mediated apoplastic pathway and the plasmodesmata-mediated symplasmic pathway. Regulatory proteins and RNAs traffic symplasmically via plasmodesmata and play a critical role in intercellular communication. Thus, the non-cell autonomous function of homeotic proteins can be explained by the recent discovery of cell-to-cell trafficking of proteins or RNAs. This article specifically focuses on understanding the intercellular movement of homeodomain proteins, a family of homeotic proteins.

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