Han-Seop BEA, Young-Man SEO, Min-Ho CHA, Byung-Gee KIM, Hyungdon YUN
언어
영어(ENG)
URL
https://www.earticle.net/Article/A114544
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원문정보
초록
영어
Chiral amines are of great interest in pharmaceutical and fine-chemical industries. Transaminases have good characteristics required for industrial biocatalysts such as broad substrate specificity, high enantioselectivity, high turnover number, and no requirement for external cofactor regeneration. Omega-transaminase can be developed to either prepare chiral amines from prochiral compounds (asymmetrization) or from racemic mixtures (kinetic resolution). Pichia pastoris expression system has been used successfully for production of various recombinant heterogous proteins, which offers several advantages such as tight regulation by methanol, easy growth to high cell density, high levels of protein expression at the intra- or extra- cellular level, resistant to organic solvent, and the ability to perform eukaryotic protein modifiacation. In this study, recombinant Pichia pastoris expressing omegatransaminase was used as a whole-cell biocatalyst to kinetic resolve alphamethylbenzylamine (MBA). To overcome product inhibition of omega-TA by acetophenone (deaminated product of alpha-MBA), the reaction condition for endogenous oxidoreductases which catalyze the reduction of acetophenone into noninhibitory 1-phenylethanol was optimized. When the whole-cell reaction was carried out using recombintat P. pastoris in 100 mM Tris/HCl buffer (pH 9.0) containing 2.5 % glucose and 1% methanol, 100 mM alpha-MBA was successfully resolved to (R)-alpha-MBA (>99% ee) at 52.2% conversion.
키워드
Chiral amineOmega-transaminasePichia pastoris
저자
Han-Seop BEA [ School of Biotechnology, Yeungnam University ]
Young-Man SEO [ School of Biotechnology, Yeungnam University ]
Min-Ho CHA [ School of Chemical and Biological Engineering, Seoul National University ]
Byung-Gee KIM [ School of Chemical and Biological Engineering, Seoul National University ]
Hyungdon YUN [ School of Biotechnology, Yeungnam 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
5. 생물공학 발전을 위한 정책 건의
6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동