Escherichia coli L-valine production strain was constructed by rational design. L-valine production strain was constructed by releasing two regulatory mechanisms, feedback inhibition and attenuation. Two amino acids alterations were introduced into ilvH which is subject to feedback inhibition by using site-directed mutagenesis. The leader region of ilvGMEDA and ilvBN operon which is involved in attenuation was changed with the strong tac promoter by homologous recombination. Further improvement of the L-valine production strain was achieved by knocking out ilvA, leuA and panB genes thus making more substrate available for L-valine biosynthesis. L-valine production strain also contains plasmid to overexpress the ilvBNCED genes. Transcriptome analysis was used to identify the physiology at mRNA level during the biosynthesis of L-valine. And we also achieved improvement of L-valine production strain based on transcriptome profiling.[This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (No. M10309020000-03B5002-00000). Further supports by LG Chem Chair Professorship, Microsoft and IBM SUR program are appreciated.]
저자
Jin Hwan Park [ Metabolic and Biomolecular Engineering National Research Laboratory (BK21 program), Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology ]
Kwang Ho Lee [ Metabolic and Biomolecular Engineering National Research Laboratory (BK21 program), Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, R & D Center for Bioproducts, CJ corp. ]
Sang Yup Lee [ Metabolic and Biomolecular Engineering National Research Laboratory (BK21 program), Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Department of BioSystems and Bioinformatics Research Center, Korea Advanced Institute of Science and Technology ]
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