농약과학회지 (The Korean Journal of Pesticide Science)

  • 제9권3호
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  • Pages.191-198
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  • 2005
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  • 1226-6183(pISSN)
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  • 2287-2051(eISSN)
한국농약과학회 (The Korean Society of Pesticide Science)
권호 표지

단백질의 구조연구 : ACE의 기질 HHL을 이용한 신규 살충제 표적 AnCE에 대한 약리단 연구

Protein structure analysis : Pharmacophore study for new insecticide target AnCE using the substrate of ACE, HHL molecule

  • 발행 : 2005.09.30
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⟨ 이전 논문 다음 논문 ⟩

초록

신규 살충제 표적 단백질인 AnCE의 활성부위 잔기들과 상호작용 가능한 약리단 (pharmacophore)을 세 개의 펩타이드로 이루어진 ACE 기질 Hippuryl-L -histidyl-L-leucine (Hip-L-His-L-Leu, HHL) 분자의 구조를 모델로 하여 예측하였다. HHL의 분자구조, 용액장 내에서의 구조변화 그리고 약리단을 구성하는 원자들의 전하밀도 분석을 위해 순이론적인 양자화학 계산방법을 이용하여 구조 최적화, NMR 화학적 이동 및 NPA 계산을 수행하였다. 이론적인 NMR 화학적 이동 값들은 실험 결과와 잘 일치함을 보였고 전하밀도 계산 결과는 해당원자의 약리단을 분석하는데 사용되었다. 결과적으로 HHL 분자 구조를 통해 소수성(aromatic, aliphatic), 수소결합 주게, 수소결합 받게, 금속 아연 결합부위의 5개 약리단을 추출할 수 있었다.

Hippuryl-L-histidyl-L-leucine (Hip-L-His-L-Leu, HHL) is the known substrate of ACE, which used often in inhibition kinetic study to design new inhibitor. Here we use HHL molecule as a template to predict pharmacophore which can interact with residues in active site of AnCE, new potential insecticide target protein. To explain physicochemical properties related to molecular geometry and conformational change in reaction field as well as electron density of atoms associated to pharmacophores, geometry optimization, NMR chemical shifts and natural population analysis were performed by ab initio and DFT method. Calculated NMR chemical shifts showed good agreement with the experimental ones and obtained electron densities were used for analyzing pharmacophores of corresponding atoms. Finally, we could extract aye pharmacophores related to hydrophobic aliphatic and aromatic site, hydrogen bonding donor and acceptor site and Zn binding site from the HHL molecule.

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