Enhanced recombinant protein productivity by genome reduction in Bacillus subtilis.
The emerging field of synthetic genomics is expected to facilitate the generation of microorganisms with the potential to achieve a sustainable society. One approach towards this goal is the reduction of microbial genomes by rationally designed deletions to create simplified cells with predictable behavior that act as a platform to build in various genetic systems for specific purposes. We report a novel Bacillus subtilis strain, MBG874, depleted of 874 kb (20%) of the genomic sequence. When compared with wild-type cells, the regulatory network of gene expression of the mutant strain is reorganized after entry into the transition state due to the synergistic effect of multiple deletions, and productivity of extracellular cellulase and protease from transformed plasmids harboring the corresponding genes is remarkably enhanced. To our knowledge, this is the first report demonstrating that genome reduction actually contributes to the creation of bacterial cells with a practical application in industry. Further systematic analysis of changes in the transcriptional regulatory network of MGB874 cells in relation to protein productivity should facilitate the generation of improved B. subtilis cells as hosts of industrial protein production.
Morimoto
Takuya
T
Biological Science Laboratories, Kao Corporation, 2606 Akabane, Ichikai, Haga, Tochigi 321-3497, Japan.
Kadoya
Ryosuke
R
Endo
Keiji
K
Tohata
Masatoshi
M
Sawada
Kazuhisa
K
Liu
Shengao
S
Ozawa
Tadahiro
T
Kodama
Takeko
T
Kakeshita
Hiroshi
H
Kageyama
Yasushi
Y
Manabe
Kenji
K
Kanaya
Shigehiko
S
Ara
Katsutoshi
K
Ozaki
Katsuya
K
Ogasawara
Naotake
N
D001412:Bacillus subtilis / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D044602:Cellulases / Q000235:genetics / Q000378:metabolism; D010450:Endopeptidases / Q000235:genetics / Q000378:metabolism; D017353:Gene Deletion; D015964:Gene Expression Regulation, Bacterial; D016680:Genome, Bacterial; D023281:Genomics / Q000379:methods; D007218:Industrial Microbiology / Q000379:methods*; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism*; D013171:Spores, Bacterial
D001426:Bacterial Proteins; D011994:Recombinant Proteins; D044602:Cellulases; D010450:Endopeptidases; C087822:alkaline protease