The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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CoMFA and CoMSIA Analysis on the Fungicidal Activity against Damping-off (Pythium ultimum) with N-phenylbenzenesulfonamide Analogues

N-phenylbenzenesulfonamide 유도체들에 의한 모잘록병균 (Pythium ultimum)의 살균활성에 관한 CoMFA 및 CoMSIA분석

  • Jang, Seok-Chan (Division of Applied Biology and Chemistry, College of Agriculture and Life Sciences, Chungnam National University) ;
  • Kang, Kyu-Young (Division of Applied Life Science, Gyeongsang National University) ;
  • Sung, Nack-Do (Division of Applied Biology and Chemistry, College of Agriculture and Life Sciences, Chungnam National University)
  • 장석찬 (충남대학교 농업생명과학대학 응용생물화학부) ;
  • 강규영 (경상대학교 농업생명과학대학 환경생명화학) ;
  • 성낙도 (충남대학교 농업생명과학대학 응용생물화학부)
  • Published : 2007.03.30
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Abstract

Three-dimensional quantitative structure-activity relationships (3D-QSARs) on the fungicidal activity against damping-off (Pythium ultimum) with N-phenylbenzenesulfonamide and N-phenyl-2-thienylsulfonamide analogues (1-34) were studied quantitatively using CoMFA (comparative molecular field analysis) and CoMSIA (comparative molecular similarity indeces analysis) methodologies. On the whole, the statistical qualities of CoMSIA models with field fit alignment (FF1-FF5) were slightly higher than that of atom based fit alignment (AF1-AF5) but, the deviations of statistical quality between two alignments in case of CoMFA models were slightly lower. The statistical results of CoMFA and CoMSIA model showed that the optimized CoMSIA model (FF1: $r_{cv.}^2\;(q^2)=0.674$ & $r_{ncv.}^2=0.964$) for damping-off is better predictability and fitness for fungicidal activities than CoMFA model (AF5: $r_{cv.}^2\;(q^2)=0.616$ & $r_{ncv.}^2=0.930$). The fungicidal activities according to the information of the CoMSIA (FF1) model were dependence upon the electrostatic and hydrophobic field of the N-phenylbenzene sulfonamide analogues. Therefore, from the results of graphical analyses on the contour maps with CoMSIA (FF3) model, it is expected that the characters of R4-substituent on the N-phenyl ring as hydrophobic and hydrogen bond acceptor will be contributed to the fungicidal activity against damping-off.

N-phenylbenzenesulfonamide 및 N-phenyl-2-thienylsulfonamide 유도체(1-34)들의 phenyl 및 theinyl 고리상치환기(R1-R5) 변화에 따른 모잘록병균(Pythium ultimum)의 살균활성에 관한 3차원적인 정량적 구조와 활성과의 관계(3D-QSARs)들을 비교 분자장 분석(CoMFA)과 비교분자 유사성 지수분석(CoMSIA) 방법으로 각각 검토하였다. 전반적으로 CoMSIA 모델들의 통계값은 atom based fit 정렬보다는 field fit 정렬시에 높은 값을 나타내었으나 CoMFA모델의 경우에는 차이가 없었다. 그리고 CoMSIA (FF1) 모델($r_{cv.}^2\;(q^2)=0.674$ 및 $r_{ncv.}^2=0.964$)이 CoMFA (AF5) 모델($r_{cv.}^2\;(q^2)=0.616$ 및 $r_{ncv.}^2=0.930$)보다 상관성과 예측성이 양호하였다. CoMSIA (FF1) 모델의 정보에 따라 살균활성은 분자의 정전기장과 소수성장에 의존적이었다. 또한, CoMSIA (FF3) 모델의 등고도 분석 결과로부터 N-phenyl 고리상 R4-치환기의 친수성과 수소결합 받게로서의 성질인 모잘록병균의 살균활성에 기여할 것으로 예상되었다.

Keywords

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