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Coexpression of rumen microbial β-glucanase and xylanase genes in Lactobacillus reuteri

Coexpression of rumen microbial β-glucanase and xylanase genes in Lactobacillus reuteri The aim of this study was to clone and coexpress two rumen fibrolytic enzyme genes in Lactobacillus reuteri. The ability of the genetically modified strain to degrade β-glucan and xylan was evaluated. The Fibrobacter succinogenes β-glucanase (1,3–1,4-β-d-glucan 4-glucanohydrolase [EC 3.2.1.73]) gene and the Neocallimastix patriciarum xylanase gene, xynCDBFV, were constructed to coexpress and secrete under control of the Lactococcus lactis lacA promoter and its secretion signal and then transformed into L. reuteri Pg4, a strain isolated from the gastrointestinal tract of broiler chickens. The transformed L. reuteri strain acquired the capacity to break down soluble β-glucan and xylan. The introduction of the recombinant plasmids and production of β-glucanase and xylanase did not affect cell growth. To the best of our knowledge, this is the first report of coexpression of rumen microbial fibrolytic enzyme genes in L. reuteri. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Microbiology and Biotechnology Springer Journals

Coexpression of rumen microbial β-glucanase and xylanase genes in Lactobacillus reuteri

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References (42)

Publisher
Springer Journals
Copyright
Copyright © 2007 by Springer-Verlag
Subject
Chemistry; Microbial Genetics and Genomics; Microbiology ; Biotechnology
ISSN
0175-7598
eISSN
1432-0614
DOI
10.1007/s00253-007-1123-5
pmid
17694302
Publisher site
See Article on Publisher Site

Abstract

The aim of this study was to clone and coexpress two rumen fibrolytic enzyme genes in Lactobacillus reuteri. The ability of the genetically modified strain to degrade β-glucan and xylan was evaluated. The Fibrobacter succinogenes β-glucanase (1,3–1,4-β-d-glucan 4-glucanohydrolase [EC 3.2.1.73]) gene and the Neocallimastix patriciarum xylanase gene, xynCDBFV, were constructed to coexpress and secrete under control of the Lactococcus lactis lacA promoter and its secretion signal and then transformed into L. reuteri Pg4, a strain isolated from the gastrointestinal tract of broiler chickens. The transformed L. reuteri strain acquired the capacity to break down soluble β-glucan and xylan. The introduction of the recombinant plasmids and production of β-glucanase and xylanase did not affect cell growth. To the best of our knowledge, this is the first report of coexpression of rumen microbial fibrolytic enzyme genes in L. reuteri.

Journal

Applied Microbiology and BiotechnologySpringer Journals

Published: Aug 11, 2007

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