SangJoon MO, Yeon-Hee BAN, Je Won PARK, Young Ji YOO, Yeo Joon YOON
언어
영어(ENG)
URL
https://www.earticle.net/Article/A114496
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원문정보
초록
영어
FK506 is a 23-membered polyketide macrolide with immunosuppressant activity produced by Streptomyces species. The production of FK506 in Streptomyces clavuligerus CKD1119 (KCTC 10561BP) was improved by enhancing the supply of biosynthetic precursors. FK506 production by S. clavuligerus CKD1119 was improved approximately 2.5-fold (15 mg/l) through the supplementation of 10 mM methyl oleate, which is the probable source of acyl-CoAs, in R2YE medium. When the level of FK506 production reached its maximum, the intracellular concentration of methylmalonyl- CoA in S. clavuligerus CKD1119 supplemented with methyl oleate was 12.5 times higher than that of the unsupplemented strain, suggesting that an increased methylmalonyl-CoA level caused the highlevel production of FK506. The following three pathways for the production of (2S)-methylmalonyl- CoA were evaluated to identify the effective precursor supply pathway that can support the high production of FK506 in S. clavuligerus CKD1119: propionyl-CoA carboxylase, methylmalonyl-CoA mutase (MCM), and malonyl/methylmalonyl-CoA ligase. Of the three pathways examined, the MCM pathway supported the highest levels of FK506 production. The expression of MCM in S. clavuligerus CKD1119 led to a 3-fold and 1.5-fold increase in the methylmalonyl-CoA pool and FK506 production, respectively. Supplementing the culture broth of S. clavuligerus CKD1119 expressing MCM with methyl oleate resulted in an additional 2-fold increase in the FK506 titer (17.8 mg/l). Overall, these results show that the methylmalonyl-CoA supply is a limiting factor for FK506 biosynthesis, and among the three pathways analyzed, the MCM pathway is the most effective precursor supply pathway supporting the highest titer of FK506 in S. clavuligerus CKD1119.
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다
1. 생물공학 분야의 발전을 위한 연구 협력
2. 생물공학의 실용화를 촉진시키기 위한 산학 협동
3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최
4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간
5. 생물공학 발전을 위한 정책 건의
6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동