KSBB Journal

  • 제18권5호
  • /
  • Pages.404-407
  • /
  • 2003
  • /
  • 1225-7117(pISSN)
  • /
  • 2288-8268(eISSN)
한국생물공학회 (The Korean Society for Biotechnology and Bioengineering)
권호 표지

재조합 대장균에 의한 유청으로부터 Poly[3-hydroxybutyrate-co-3-hydroxyvalerate] 합성

Synthesis of Poly[3-hydroxybutyrate-co-3-hydroxyvalerate] by Recombinant Escherichia coli from Whey

  • 김범수 (충북대학교 화학공학부) ;
  • 이상엽 (한국과학기술원 생명화학공학과)
  • 발행 : 2003.10.01
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초록

R. eutropha의 PHA 생합성 유전자를 포함하는 플라스미드 pSYL107을 가진 재조합 대장균 GCSC6576과 A. latus PHA 생합성 유전자를 포함하는 플라스미드 pJC4를 가진 fadR atoC 돌연변이주 재조합 대장균 LS5218의 유청으로부터 P(3HB-co-3HV) 합성을 비교하였다. 재조합 대장균 GCSC6576(pSYL107)의 플라스크 배양에서 acetic acid induction과 oleic acid의 첨가는 3HV 함량을 증가시켰다. 재조합 대장균 LS5218의 pH-stat 유가식 배양결과, 39시간에 균체농도 31.8 g/L, P(3HB-co-3HV) 농도 10.6 g/L, P(3HB-co-3HV) 함량 33.4%, 3HV 함량 6.26 mol%를 얻을 수 있었다.

Two recombinant Escherichia coli strains, GCSC6576 harboring a plasmid pSYL107 containing the Ralstonia eutropha polyhydroxyalkanoate (PHA) biosynthesis genes and a fadR atoC mutant LS5218 harboring a plasmid pJC4 containing the Alcaligenes latus PHA biosynthesis genes were compared for their ability to synthesize poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(3HB-co-3HV) from whey. The 3HV fraction could be increased by acetic acid induction and oleic acid supplementation in flask cultures of recombinant E. coli GCSC6576. With the pH-stat fed-batch culture of recombinant E. coli LS5218, we obtained a cell concentration, a P(3HB-co-3HV) concentration, a P(3HB-co-3HV) content, and a 3HV fraction of 31.8 g/L, 10.6 g/L, 33.4%, and 6.26 mol%, respectively in 39 h.

키워드

참고문헌

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