Biotechnology Bulletin ›› 2013, Vol. 0 ›› Issue (6): 122-127.

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Cloning, Expression and Activity Analysis of Lipase Gene from Rhizomucor miehei

Miao Changlin1 Luo Wen1 Liu Shuna1 Lü Pengmei1 Li Huiwen1 Yang Lingmei1 Yuan Zhenhong1 Jiang Jianchun2   

  1. (1. Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, CAS, Guangzhou 510640;2. Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042)
  • Received:2013-06-20 Revised:2013-06-20 Online:2013-06-20 Published:2013-06-20

Abstract: Lipase gene cDNA fragment from Rhizomucor miehei(RML)was amplified by RT-PCR method. Expression vector RML-pPIC9K containing lipase gene was constructed and the gene was expressed in His4 mutant Pichia pastoris yeast GS115. Recombinant Pichia strains were obtained by minimal olive oil-methanol plates screening and confirmed by PCR. The expression product of RML gene was analysis by SDS-PAGE, and molecular weight of the expressed protein was estimated to be 39 kD. The activity of lipase was up to 84 U/mL determined by the method of titration of NaOH. The result indicated that RML gene was functionally overexpressed in Pichia pastoris.

Key words: Rhizomucor miehei, Lipase Pichia pastoris, Gene clone, Gene expression