Streptomyces clavuligerus NRRL3585 produces a clinically important ß-lactamase inhibitor, clavulanic acid and 5S clavam. In this study, the orf21 encodes putative sigma factor was disrupted from the clavulanic acid and 5S clavam producer Streptomyces clavuligerus NRRL3585 and characterized. The fully sequenced open reading frame encodes 201 amino acids, with a predicted molecular mass of 22.75 kDa. A orf21 mutant of Streptomyces clavuligerus was obtained by insertional inactivation via double crossover, and the effect of orf21 disruption on clavulanic acid yield was investigated by comparing antibiotic levels in culture broths of this mutant and in the wild type. Although growth and morphological analyses showed no differences between Streptomyces clavuligerus/Δorf21::neor and wild-type, the production of clavulanic acid in Streptomyces clavuligerus/Δorf21::neor was found to be slightly decreased. But the co-expression of orf21 in wildtype cells resulted in an enhanced 1.43-fold production of clavulanic acid higher than normal levels. This result demonstrates that the replication of orf21 enhances CA production.
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