Heterologous expression of cholesterol oxidase in Bifidobacterium longum under the control of 16S rRNA gene promoter of bifidobacteria.
We have constructed a constitutive high-level-expression vector for the genus Bifidobacterium and used it to express cholesterol oxidase from Streptomyces coelicola. The promoter region of the 16S rRNA gene was amplified by inverse PCR and used for the construction of pBES16PR. The optimal ribosome-binding site (RBS) for Bifidobacterium was incorporated in pBES16PR. In order to test the efficacy of this expression vector, we constructed pBES16PR-CHOL with the structural gene for cholesterol oxidase under the control of the 16S rRNA promoter, and used it to transform Bifidobacterium longum. The gene was successfully expressed and high level of cholesterol oxidase activity was obtained in B. longum. This is the first report of an expression vector for the genus Bifidobacterium using a 16S rRNA gene promoter and successful expression of cholesterol oxidase.
Park
Myeong Soo
MS
Research center, BIFIDO Co., Ltd., Seoul 151-818, Korea.
Kwon
Bin
B
Shim
Jae Jung
JJ
Huh
Chul Sung
CS
Ji
Geun Eog
GE
D001644:Bifidobacterium / Q000201:enzymology* / Q000235:genetics*; D002789:Cholesterol Oxidase / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D004789:Enzyme Activation; D004795:Enzyme Stability; D011401:Promoter Regions, Genetic / Q000235:genetics*; D015202:Protein Engineering / Q000379:methods; D012336:RNA, Ribosomal, 16S / Q000235:genetics*; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism; D048372:Streptomyces coelicolor / Q000502:physiology*
D012336:RNA, Ribosomal, 16S; D011994:Recombinant Proteins; D002789:Cholesterol Oxidase