The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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3D-QSAR Analysis on the Photosystem II Inhibition Activity of 6-Bromobenzo[4,5]imidazo[$1,2{\alpha}$]pyridin-8,9-dione Analogues

6-Bromobenzo[4,5]imidazo[$1,2{\alpha}$pyridin-8,9-dione 유도체들의 Photosystem II 저해활성에 관한 3D-QSAR 분석

  • Kim, Se-Gon (Division of Applied Biology & Chemistry, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Cho, Yun-Gi (Division of Applied Biology & Chemistry, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Hwang, Tae-Yeon (Division of Applied Biology & Chemistry, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Sung, Nack-Do (Division of Applied Biology & Chemistry, College of Agriculture and Life Sciences, Chungnam National University)
  • 김세곤 (충남대학교 농업생명과학대학 응용생물화학부) ;
  • 조윤기 (충남대학교 농업생명과학대학 응용생물화학부) ;
  • 황태연 (충남대학교 농업생명과학대학 응용생물화학부) ;
  • 성낙도 (충남대학교 농업생명과학대학 응용생물화학부)
  • Published : 2008.03.31
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Abstract

3D-QSAR on the inhibitory activities of 6-bromobenzo-[4,5]imidazo[$1,2{\alpha}$]-pyridin-8,9-diones analogues as substrate molecule were studied quantitatively using CoMFA and CoMSIA methods. The statistical values of CoMFA model was better predictability and fitness than CoMSIA model. The inhibitory activities according to the optimized CoMFA 2 model were dependent on the steric field (90.4%). From the CoMFA contour maps, it is found that the branched side chain as R-group will be directly attached to the carbon atom (ipso carbon) of substituent, the inhibitory activities had expected to increase. The positive charge favor groups were placed in the position between imidazol ring and pyridine ring, the inhibitory activities would increase. And if the groups of liner type will be substituted, hydrophilic favor group would raise inhibitory activities.

기질 분자로서 6-bromobenzo-[4,5]imidazo[$1,2{\alpha}$]pyridin-8,9-diones 유도체의 photosystem II의 저해활성에 관한 3차원적인 정량적 구조와 활성과의 관계(3D-QSARs)들을 비교 분자장분석(CoMFA)과 비교분자 유사성 지수분석(CoMSIA) 방법으로 각각 검토하였다. CoMFA 모델은 CoMSIA 모델보다 높은 예측성과 상관성을 갖는 모델이었다. 또한 최적화된 CoMFA 2 모델의 기여도는 입체장(90.4%)에 가장 의존적이었다. CoMFA 등고도 분석으로부터, 치환기(R)로서 모체로 연결되는 탄소원자(ipso carbon)에 곁가지를 가진 치환체가 도입될수록 저해활성이 증가할 것으로 보인다. 또한, imidazol 고리와 pyridine 고리 사이의 위치에 양하전을 가질수록 활성이 높을 것으로 예상되며 친수성을 띄는 선 형태의 치환기가 도입되는 경우에 활성이 개선될 것으로 판단되었다.

Keywords

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