Characterization of a dehydrogenase motif and an uORF in Arabidopsis ANGUSTIFOLIA gene

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<i>ANGUSTIFOLIA</i> (<i>AN</i>), the first gene encoding a putative C-terminal binding protein (CtBP) identified in plants, controls leaf cell width in a polarity-dependent manner by regulating the arrangement of cortical microtubules. However, several differences in the sequence of AN have been detected in its conserved CtBP domains, which are transcriptional co-repressors in animals; thus, it is unclear whether AN is a transcriptional co-repressor in plants and how it may function. In this study, we found that AN possesses incomplete D2-HDH and GxGxxG(17x)D motifs, which confer CtBP dehydrogenase activity and NAD-binding for interaction with PxDLS motifs, respectively. In addition, full-length AN was unable to couple the reduction of pyruvate to lactic acid with the oxidation of NADH to NAD<sup>+</sup>, suggesting that it might not have dehydrogenase activity. Moreover, we found that AN has an additional short open reading frame (ORF), which was identified as an upstream ORF (uORF), in its 5′-untranslated region that overlaps with the start codon of the <i>AN</i> gene. Transcriptional analysis revealed that the uORF and <i>AN</i> ORF are transcribed as a single molecule, indicating that the uORF might influence <i>AN</i> transcription during leaf development.

収録刊行物

  • Plant biotechnology  

    Plant biotechnology 25(4), 365-368, 2008-09-01 

    Japanese Society for Plant Cell and Molecular Biology

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各種コード

  • NII論文ID(NAID)
    10021914183
  • NII書誌ID(NCID)
    AA11250821
  • 本文言語コード
    ENG
  • 資料種別
    SHO
  • ISSN
    13424580
  • NDL 記事登録ID
    9558275
  • NDL 雑誌分類
    ZR3(科学技術--生物学--植物)
  • NDL 請求記号
    Z54-J126
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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