Woo-Chel JUNG, Subramanian MOHAN RAJ, Chelladurai RATHNASINGH, Sunghoon PARK
언어
영어(ENG)
URL
https://www.earticle.net/Article/A115124
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원문정보
초록
영어
An aldehyde dehydrogenase (AldH), from Klebsiella pneumoniae was cloned, expressed, and characterized for its properties in E. coli BL21(DE3). The enzyme effectively converts 3-hydroxypropionaldehyde (3-HPA), an intermediary compound of glycerol metabolism in bacteria, to 3-hydroxypropionic acid (3-HP), a commercially valuable platform chemical. It also exhibited broad substrate specificity for various aliphatic and aromatic aldehydes. The enzyme showed preference towards NAD+ over NADP+ as a cofactor for the oxidation of most aliphatic aldehydes. When several aldehydes tested, the specific activity of 27.7 U mg-1 protein was recorded for 3-HPA at pH 8.0 and 45°C. The halfsaturation constant (Km) and the specificity constant (kcat) for 3-HPA in the presence of NAD+ were 0.48 mM and 41.44ⅹ103 M-1 S-1, respectively. The AldH activity was enhanced in the presence of disulfide reductants such as dithiothreitol, 2-mercaptoethanol, or semicarbazide hydrochloride. Reduction in the AldH activity was noted in the presence of certain metal ions like Hg2+, Ag+, Cu2+, Fe2+ and Zn2+. This study demonstrated that AldH of K. pneumoniae was very specific towards NAD+ and highly active in converting 3-HPA to 3-HP.
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