Structure and Contractile Activity of the Bowfin- and Shark-neuropeptide $\gamma$

Bowfin-과 Shark-neuropeptide $\gamma$의 구조 및 수축효과

  • KIM Eun Jung (Department of Biotechnology and Bioengineering, College of Fisheries Science, Pukyong National University) ;
  • SEO Jung-Kil (Department of Biotechnology and Bioengineering, College of Fisheries Science, Pukyong National University) ;
  • KIM Chan-Hee (Department of Biotechnology and Bioengineering, College of Fisheries Science, Pukyong National University) ;
  • GO Hye-Jin (Department of Biotechnology and Bioengineering, College of Fisheries Science, Pukyong National University) ;
  • HUH Min-Do (Department of Aquatic Life Medicine, College of Fisheries Science, Pukyong National University) ;
  • MOON Jung-Hye (Seafood and Marine Resources Development Center, Pukyong National University) ;
  • PARK Jang-Su (Department of Chemistry, College of National Science, Pusan National University) ;
  • PARK Nam Gyu (Department of Biotechnology and Bioengineering, College of Fisheries Science, Pukyong National University)
  • 김은정 (부경대학교 수산과학대학 생물공학과) ;
  • 서정길 (부경대학교 수산과학대학 생물공학과) ;
  • 김찬희 (부경대학교 수산과학대학 생물공학과) ;
  • 고혜진 (부경대학교 수산과학대학 생물공학과) ;
  • 허민도 (부경대학교 수산과학대학 수산생명의학과) ;
  • 문정혜 (해양식량자원특성화사업단) ;
  • 박장수 (부산대학교 자연과학대학 화학과) ;
  • 박남규 (부경대학교 수산과학대학 생물공학과)
  • Published : 1999.03.01

Abstract

The relationship between structure and contractile activity was studied on the three neuropeptide $\gamma$ (mammalian-, bowfin-, shark-NP$\gamma$) that were synthesized by the solid-phase method. Circular dichroism spectra showed that mammalian-, bowfin- and shark-neuropeptide $\gamma$ took an unordered structure in buffer solution and artificial liposome. The intestinal motility response was investigated with guinea-pig ileum, rat duodenum and carp intestine. In case of carp intestine, contractile activity was as follows; bowfin-NP$\gamma$> shark-NP$\gamma$>mammalian-NP$\gamma$, On the other hand, the contractile activity of mammalian-neuropeptide $\gamma$ was more potent than those of bowfin-, shark-neuropeptide $\gamma$ in the guinea-pig ileum and rat duodenum. These results suggest that NP$\gamma$ show the species-specific activity.

Tachykinin peptide의 구조와 생리활성간의 상관관계를 조사하기 위해 고상법으로 합성한 어류 유래의 neuropeptide $\gamma$(Mammalian-, Bowfin- 그리고 Shark-neuropeptide $\gamma$)를 사용하였다. 이들의 이차 구조를 알아보기 위해 circular dichroism (CD)을 이용하였다. CD 연구 결과에 따르면, mammalian-neuropeptide $\gamma$, bowfin-neuropeptide $\gamma$와 shark-neuropeptide $\gamma$는 완충액과 인공지질막 조건하에서 random구조를 나타내었다. 또한 이들 neuropeptide $\gamma$의 장관에 대한 수축 활성을 조사하기 위해 guinea-pig의 회장, rat의 십이지장과 carp intestine을 사용하였다. Carp intestine에 서 bowfin-neuropeptide $\gamma$>shark- neuropeptide $\gamma$>mammalian-neuropeptide $\gamma$순으로 활성 이 나타났다. 그러나, guinea-pig 회장과 rat 십이지장에 대해서 mammalian-NP$\gamma$의 활성이 어류 유래의 neuropeptide $\gamma$들보다 높게 나타났다. 이러한 결과들은 neuropeptide $\gamma$가 종-특이적인 활성을 나타냄을 제시한다.

Keywords