Creation of novel technologies for extracellular protein production toward the development of bacillus subtilis genome factories

Katsutoshi Ara*, Kenji Manabe, Shenghao Liu, Yasushi Kageyama, Tadahiro Ozawa, Masatoshi Tohata, Keiji Endo, Kazuhisa Sawada, Nozomu Shibata, Akihito Kawahara, Kazuhiro Saito, Hiroshi Kodama, Yoshiharu Kimura, Katsuya Ozaki, Yoshinori Takema, Hiroshi Kakeshita, Kouji Nakamura, Kunio Yamane, Takeko Kodama, Junichi SekiguchiTakuya Morimoto, Ryosuke Kadoya, Shigehiko Kanaya, Yasutaro Fujita, Fujio Kawamura, Naotake Ogasawara

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter


Bacillus subtilis has been widely used for the industrial production of useful proteins because of its high protein secretion ability and safety. We focused on genome reduction as a new concept for enhancing production of recombinant enzymes in B. subtilis cells based on detailed analysis of the genome mechanism. First, we reported that a novel B. subtilis strain, MGB874, depleted 20.7 % of the genomic sequence of the wild type by rationally designed deletions to create simplified cells for protein production. When compared with wild-type cells, the productivity of cellulase and protease from transformed plasmids harboring the corresponding genes was markedly enhanced. These results indicate that a bacterial factory specializing in the production of substances can be constructed by deleting the genomic regions unimportant for growth and substance production from B. subtilis. Second, deletion of the rocDEF-rocR region, which is involved in arginine degradation, was found to contribute to the improvement of enzyme production in strain MGB874. The present study indicated that our results demonstrated the effectiveness of a synthetic genomic approach with reduction of genome size to generate novel and useful bacteria for industrial uses. Furthermore, the design of the changes in the transcriptional regulatory network of the nitrogen metabolic pathway in B. subtilis cells could facilitate the generation of improved industrial protein production.

Original languageEnglish
Title of host publicationMicrobial Production
Subtitle of host publicationFrom Genome Design to Cell Engineering
PublisherSpringer Japan
Number of pages13
ISBN (Electronic)9784431546078
ISBN (Print)4431546065, 9784431546061
Publication statusPublished - 2013 Nov 1
Externally publishedYes


  • Bacillus subtilis
  • Recombinant protein productivity
  • Refined genome factory

ASJC Scopus subject areas

  • Immunology and Microbiology(all)
  • Biochemistry, Genetics and Molecular Biology(all)


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