Comparative Studies of the AHP Histidine-containing Phosphotransmitters Implicated in His-to-Asp Phosphorelay in Arabidopsis thaliana

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The evolutionarily-conserved histidine to aspartate (His-to-Asp) phosphorelay signal transduction is common in both prokaryotes and eukaryotes. Such a phosphorelay system is generally made up of ‘a histidine (His)-kinase’, ‘a histidine-containing phosphotransmitter (HPt)’, and ‘a phospho-accepting response regulator (RR)’. In general, an HPt factor acts as an intermediate in a given multistep His-to-Asp phosphorelay. In <I>Arabidopsis thaliana</I>, this model higher plant has five genes (named <I>AHP1</I> to <I>AHP5</I>), each of which seems to encode an HPt factor. Recent studies suggested that the His-to-Asp phosphorelay involving the AHP factors is at least partly implicated in signal transduction in response to cytokinin (a plant hormone). Nevertheless, the properties of AHPs have not yet been fully clarified. Here we did comparative studies of all the AHP factors, in terms of (i) expression profiles in plants, (ii) intracellular localization, (iii) ability to acquire a phosphoryl group <I>in vitro</I>, and (iv) ability to interact with the downstream components, ARRs (<I>Arabidopsis</I> response regulators). The results of this study provided us with a comprehensive view at the molecular level for understanding the functions of the AHP phosphotransmitters in the His-to-Asp phosphorelay.

収録刊行物

  • Bioscience, biotechnology, and biochemistry

    Bioscience, biotechnology, and biochemistry 68(2), 462-465, 2004-02-23

    公益社団法人 日本農芸化学会

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各種コード

  • NII論文ID(NAID)
    10013142319
  • NII書誌ID(NCID)
    AA10824164
  • 本文言語コード
    ENG
  • 資料種別
    NOT
  • ISSN
    09168451
  • NDL 記事登録ID
    6868664
  • NDL 雑誌分類
    ZR7(科学技術--農林水産--農産) // ZR2(科学技術--生物学--生化学) // ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-G223
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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