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Biotechnology and bioprocess engineering v.10 no.1, 2005년, pp.16 - 22   피인용횟수: 4

Cloning and Molecular Analysis of cDNA Encoding Cycloartenol Synthase from Centella asiatica (L.) Urban

Kim Ok-Tae    (Department of Biology, Chonnam National University   ); Kim Min-Young    (Department of Biology, Chonnam National University   ); Hwang Sung-Jin    (Department of Food & Biotechnology, Dongshin University   ); Ahn Jun-Cheul    (Department of Life Sciences, Seonam University   ); Hwang Baik    (Department of Biology, Chonnam National University, Institute of Plant Resources, Chonnam National University  );
  • 초록

    cDNA for oxidosqualene cyclase was cloned by a homology-based PCR method and sequenced from Centella asiatica. In a sequences analysis, the putative polypeptide of C. asiatica cycloartenol synthase (CaCYS) deduced from the 2,274 bp nucleotide sequence, consisted of 758 amino acids and had a molecular mass of 86.3 kD. The predicted amino acid sequence exhibited high homology to that of PNX (cycloartenol synthase) from Panax ginseng ( $89\%$ ). Southern blot analysis suggests that CaCYS may be present in one copy of the C. asiatica genome. If methyl jasmonate (MJ) is applied exogenously to plants, not only triterpene saponins are accumulated in tissues, but also it produces effects such as growth inhibition and the promotion of ethylene production. In order to investigate the effect of MJ and thidiazuron (TDZ), a cytokinin that plays a role as an antisenescence agent in several plants, on the level of CaCYS mRNA, we performed northern blot analysis. When MJ is alone treated by adding to culture medium, CaCYS transcripts were inhibited. However, sustained levels of the expression of CaCYS, by adding TDZ to the medium despite MJ treatments, were demonstrated in C. asiatica leaves.

  • 주제어

    Centella asiatica .   oxidosqualene cyclase .   triterpenes saponins .   phytosterols.  

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    1. 2005. "" 韓國藥用作物學會誌 = Korean journal of medicinal crop science, 13(2): 91~94     
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