Kaempferol is a natural flavonol. It reduces the risk of various cancers and also has skin-lightening effect. Due to these efficacies, the possible application in food, medicine and cosmetics industry are increasing. But these flavonols has limited application due to water solubility and stability. Considering these demerits, synthesized Astragalin (kaempferol-3-O-β-D-glucopyranoside) from kaempferol using uridine 5′-diphosphate (UDP)-3-O-glycosyltransferase. (UDP)-3-O-glycosyltransferase (UGT78K1) was expressed in E. coli BL21 (DE3) which utilize the bacterial indigenous UDP-glucose as sugar donor to catalyze glycosylation reaction. During biotransformation reaction kaempferol was exogenously fed and the product was isolated as Astragalin. To use UDP-glucose efficiently, previously constructed recombinant mono-cistronic vector (piBR181) was used which contained UDP-glucose biosynthetic pathway genes (pgm2: phosphoglucomutase and galU: glucose 1-phosphate uridylyltransferase) along with D-glucose facilitator proteins (glf: glucose facilitator diffusion protein), glucokinase (glk: glucokinase) and glycosyltransferases (UGT78K1) in mono-cistronic fashion. Luria-Bertani (LB) media was used for biotransformation reaction while cell induction was done using Lactose. Highest product conversion was achieved and were confirmed by HPLC-PDA analyses comparing with previous result.
저자
Kye Woon Cho [ Department of Life Science and Biochemical Engineering ]
Hunsang Lee [ Department of Life Science and Biochemical Engineering ]
Prakash Parajuli [ Department of Life Science and Biochemical Engineering ]
Dipesh Dhakal [ Department of Life Science and Biochemical Engineering ]
Ramesh Prasad Pandey [ Department of Life Science and Biochemical Engineering, Department of BT-Convergent Pharmaceutical Engineering, Sun Moon University ]
Jae Kyung Sohng [ Department of Life Science and Biochemical Engineering, Department of BT-Convergent Pharmaceutical Engineering, Sun Moon University ]
본 학회는 화학, 생화학, 분자생물학, 미생물학, 식품공학, 의학, 약학, 유전공학 및 생물공학, 환경 및 기타 공업 등 전 분야의 탄수화물관련 이론과 기술을 연구 발전시키고 산학협동을 통해 이를 보급하여 국내 관련 산업의 발전 및 국민생활의 과학화에 기여하고자 하며, 이러한 목표와 비젼의 실현을 위해 회원들이 적극적인 참여와 활동을 전개하고자 한다.