title: Electrotransformation and expression of cellulase genes in wild-type Lactobacillus reuteri.
abstract: Two cellulase genes, Cel15 and Cel73, were amplified from Bacillus subtilis genome DNA in a previous study. Two integrative vectors, pLEM4153 and pLEM4154, containing the genes Cel15 and Cel73, respectively, were constructed and successfully electroporated into the wild-type Lactobacillus reuteri which was isolated from chick guts through an optimized procedure. Two recombinant L. reuteri were selected from a Man, Rogosa, and Sharp (MRS) plate with 10 µg/ml erythromycin, and named L. reuteri XNY-Cel15 and L. reuteri XNY-Cel73, respectively. To verify the transcription and expression of the two cellulase genes in the recombinant L. reuteri strains, the mRNA relative quantity (RQ) and the cellulase activity were determined. The mRNA RQ of Cel15 in L. reuteri XNY-Cel15 is 1,8849.5, and that of Cel73 in L. reuteri XNY-Cel73 is 1,388, and the cellulase activity of the modified MRS broth cultured with L. reuteri XNY-Cel15 was 0.158 U/ml, whereas that with L. reuteri XNY-Cel73 was 0.15 U/ml.
authors.affiliation: College of Animal Science and Technology, Northwest Agriculture and Forestry University, Yangling, PR China.
authors.forename: Wang
authors.initials: W
authors.lastname: Li
authors.forename: Ming-Ming
authors.initials: MM
authors.lastname: Yang
authors.forename: Guang-Qin
authors.initials: GQ
authors.lastname: Zhang
authors.forename: Wan-Ling
authors.initials: WL
authors.lastname: He
authors.forename: Yuan-Xiao
authors.initials: YX
authors.lastname: Li
authors.forename: Yu-Lin
authors.initials: YL
authors.lastname: Chen
mesh_terms: D001412:Bacillus subtilis / Q000201:enzymology / Q000235:genetics; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D002266:Carboxymethylcellulose Sodium / Q000378:metabolism; D002480:Cellulase / Q000235:genetics* / Q000378:metabolism; D018274:Electroporation / Q000379:methods*; D004789:Enzyme Activation; D057075:Enzyme Assays; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D005798:Genes, Bacterial; D005818:Genetic Engineering / Q000379:methods; D005822:Genetic Vectors / Q000235:genetics; D052200:Limosilactobacillus reuteri / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D010957:Plasmids / Q000235:genetics / Q000378:metabolism; D012329:RNA, Bacterial / Q000235:genetics; D012333:RNA, Messenger / Q000032:analysis / Q000235:genetics; D014158:Transcription, Genetic
chemical_list: D001426:Bacterial Proteins; D012329:RNA, Bacterial; D012333:RNA, Messenger; D002480:Cellulase; D002266:Carboxymethylcellulose Sodium