3${\beta}$-Hydroxy-12-oleanen-28-oic Acid 유도체들의 PTP-1B저해활성에 대한 CoMSIA분석

CoMSIA Analysis on The Inhibition Activity of PTP-1B with 3${\beta}$-Hydroxy-12-oleanen-28-oic Acid Analogues

  • 김상진 (대전보건대학 화장품과학과) ;
  • 정영호 (국립과학수사연구소 법과학부) ;
  • 김세곤 (충남대학교 농업생명과학대학 응용생물화학부) ;
  • 성낙도 (충남대학교 농업생명과학대학 응용생물화학부)
  • Kim, Sang-Jin (Department of Cosmetic Science, Daejeon Health Sciences College) ;
  • Chung, Young-Ho (Division of Forensic Science, National Institute of Scientific Investigation) ;
  • Kim, Se-Gon (Division of Applied Biology and Chemistry, Chungnam National University) ;
  • Sung, Nack-Do (Division of Applied Biology and Chemistry, Chungnam National University)
  • 발행 : 2008.09.30

초록

기질 화합물로써 3${\beta}$-Hydroxy-12-oleanen-28-oic acid 유도체(1-30)들과 그들의 protein tyrosine phosphatase(PTP)-1B 저해활성에 관한 비교분자 유사성 지수분석(CoMSIA)보델을 유도하였다. QSAR 모델의 통계 값은 CoMFA>CoMSIA${\geq}$HQSAR>2D-QSAR 모델의 순서로 양호하였다. 최적화된 CoMSIA F1 모델은 grid 3.0${\AA}$과 field fit 정렬조건에서 가장 족은 예측성과 상관성($r^2_{cf}$=0.754 및 $r^2_{ncv}$=0.976)을 나타내었다. 저해 활성에 관한 CoMSIA상의 기여비율(%)은 수소결합 받게장(48.9%), 입체장(25.8%) 및 소수성장(25.4%)의 순서이었다. 그러므로 기질 화합물의 PTP-1B에 대한 저해활성은 $R_4$-치환기의 수소결합 받게 장(A)에 의존적이었다. 등고도 분석 결과로부터 $R_1$-치환기는 수소결합 받게장이 작고 $R_3$-치환기는 입체장이 작으며 그리고 $R_4$-치환기는 수소결합 받게장, 소수성 및 입체장이 큰 치환기가 저해활성을 증가시킬 것으로 예측되었다.

The comparative molecular similarity indices analysis (CoMSIA) models between 3${\beta}$-Hydroxy-12-oleanen-28-oic acid (1-30) analogues as substrate molecule and their inhibitory activities ($pI_{50}$) against protein tyrosine phosphatase (PTP)-1B were derived and discussed quantitatively. Listing in order, the CoMFA>CoMSIA${\geq}$HQSAR>2D-QSAR model, these QSAR models had the better statistical values. The optimized CoMSIA F1 model at grid 3.0${\AA}$ had the best predictability and fitness ($q^2$=0.754 and $r^2$=0.976) by field fit alignment. The order of contribution ratio (%) of CoMSIA fields concerning the inhibitory activities was a H-bond acceptor (48.9%), steric field (25.8%) and hydrophobic field (25.4%), respectively. Therefore, the inhibitory activities of substrate molecules against PTP-1B were dependent upon H-bond acceptor field (A) of $R_4$-group. From the analytical results of CoMSIA contour maps, oleanolic acid derivatives will have better inhibition activities if $R_1$ group has H-bond acceptor disfavor, $R_3$group has steric disfavor and $R_4$ group has steric, hydrophobic, H-bond favor.

키워드

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