Earticle

초록

영어

2,3-Butanediol (2,3-BD) is a promising bulk chemical due to its extensive industrial applications. Through chemical reaction such as dehydration and esterification, 2,3-BD can be converted into various chemical compounds including 1,3-butadiene, diacetyl, methyl ethyl ketone (MEK; butan-2-one). These chemical compounds are used to make highly valued materials such as synthetic rubber, antifreeze agent, flavoring agent. Several microorganism species such as Klebsiella pneumonia, Klebsiella oxytoca and Enterobacter aerogenes are natural producers of 2,3-BD. Among these microorganisms, E. aerogenes is a facultative anaerobe, which is able to produce significant amounts of 2,3-BD in mixed fermentations, while generating a number of soluble and gaseous products. Furthermore, it has a high growth rate, high vitality in different types of environment, and is able to utilize diverse range of carbon sources. First, we performed medium optimization and pH control to obtain the optimal culture condition for high cell growth and high production of 2,3-BD product. In addition, we have successfully performed lactate dehydrogenase (ldh) gene knockout by using the Red lambda recombination method. ldh gene knock out strain showed improved yield of 2,3-BD when compare with wild type. We also overexpressed budA, budB, budC and bdh gene of E.aerogenes 2,3-BD pathway operon separately and the whole operon collectively to characterize the role of each gene and to enhance the production of 2,3-BD.

키워드

저자

• Moo-young JUNG [ Dept. of Chemical & Biological Engineering, Korea University, Seoul, 136-763. ]
• Jang-mi BAEK [ Dept. of Chemical & Biological Engineering, Korea University, Seoul, 136-763. ]
• Min-kyu OH [ Dept. of Chemical & Biological Engineering, Korea University, Seoul, 136-763. ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국생물공학회 학술대회

• 간기

  반년간

• 수록기간

  1985~2013

• 십진분류

  KDC 476 DDC 576