The mobile genetic element I
S4Bsu1 of
Bacillus subtilis (
natto), the commercial strain used for natto fermentation, was found to spontaneously translocate to the
swrA gene, which led to a defect in poly-γ-glutamic acid (γPGA) synthesis. The γPGA defect of NAFIS1 (
swrA::IS
4Bsu1) was restored by a plasmid harboring the
swrA gene. The insertion of IS
4Bsu1 to the
swrA gene appeared not to interfere with
minJ gene expression, located downstream of the
swrA gene, because a defect in cell motility exhibited by NAF16 (
minJ::Spc
r) was not observed in NAFIS1 (
swrA::IS
4Bsu1). We found that the
minJ gene is essential for γPGA synthesis.
抄録全体を表示