Tautomycetin (TMC), which is produced by Streptomyces sp. CK4412, is a novel activated T cell-specific immunosuppressive compound with an ester bond linkage between a terminal cyclic anhydride moiety and a linear polyketide chain bearing an unusual terminal alkene. Previously, we isolated and characterized the entire TMC biosynthetic gene cluster from Streptomyces sp. CK44121). And also, TMC pathway-specific gene, tmcN was successfully utilized to increase TMC productivity by introducing its extra copies, implying the importance of the regulatory network optimization for strain improvement2). It was previously reported that a 64- amino-acid encoding wblA inhibited the biosynthesis of doxorubicin in S. peucetius as well as the antibiotics production in S. coelicolor, suggesting that wblA and its homologs act globally among streptomycetes as putative down-regulators of antibiotic biosynthesis3). Here, we identified a wblA ortholog gene (named wblA-tmc) via genomic DNA library screening using the degenerated primers based on wblA sequence from S. coelicolor A3(2). A 0.39kb wblA-tmc showed 96% amino acid identity compared to a previously-known S. coelicolor wblA. A targeted gene disruption of wblAtmc from the TMC-producing strain, which was confirmed by PCR and Southern-hybridization, exhibited significantly different morphological pattern as well as TMC productivity.. The more detailed biological significance of wblA-tmc will be discussed.
키워드
Streptomycestautomycetinregulatory genewblA
저자
Shin Hae PARK [ Department of Biological Engineering, Inha University ]
Si-Sun CHOI [ Department of Biological Engineering, Inha University ]
Eung-Soo KIM [ Department of Biological Engineering, Inha University ]
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
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