Korean Journal of Breeding Science (한국육종학회지)

The Korean Society of Breeding Science (한국육종학회)
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Analysis of Chalcone Synthase and Flavanone 3-Hydroxylase Activity in Lilium Cultivars

Lilium품종의 Chalcone Synthase와 Flavanone 3-Hydroxylase 효소학적 분석

  • Yu, Sun-Nam (Department of Biotechnology, Catholic University of Daegu)
  • 유순남 (대구가톨릭대학교 생명공학과)
  • Received : 2008.12.26
  • Published : 20081200
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Abstract

In this work, we analyzed the activity of control enzymes of flower color biosynthesis, chalcone synthase (CHS) and flavanone 3-hydroxylase (FHT) using biochemical and enzymological methods in Lilium longiflorum and 11 Lilium cultivars. The results obtained are as follows ; Naringenin (NAR) was synthesized in all Lilium cultivars tested by the catalytic activity of CHS which used malonyl-CoA and 4-coumaryol-CoA as substrates. Substrate-specific activity of CHS was observed because eridictiol (ERI), which uses caffeoyl-CoA as a substrate, was not detected in tested cultivars. In next step, dihydroflavone product was synthesized by FHT using flavanones as a substrate. FHT synthesized dihydrokaempferol (DHK) by using NAR as substrates. A remarkable activity of FHT was observed in other 11 cultivars.

본 실험에서 Lilium longiflorum과 11품종에 대한 biochemical, enzymology 등의 분석방법을 적용하여, 화색생합성조절유전자 chalcone synthase(CHS), flavanone 3-hydroxylase(FHT)의 활성을 분석한 결과는 다음과 같다. 1. Flavonoid의 기본골격형성을 위한 첫 효소인 CHS가 malonyl-CoA와 p-coumaroyl-CoA 기질을 촉매하여 naringenin(NAR) 산물을 생성하였고, caffeoyl-CoA와 p-coumaroyl-CoA 기질에는 eridictiol(ERI)를 생성하지 않아, 백합의 CHS는 기질특이성을 나타냈다. 2. L. longiflorum에서 FHT 효소는 NAR를 기질로써 사용하여, dihydrokaempferol(DHK) 산물을 생성하였고, 그 외 11백합품종에서도 FHT 효소의 뚜렷한 활성이 확인되었다.

Keywords

References

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