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The Bacillus subtilis structural gene pgsE was investigated as a tool for extrachromosomal DNA maintenance (EDM). It ameliorated the stability of high-copy-number vectors, regardless of whether they were derived from rolling-cycle or theta-mode replicons, without any selective pressure. This unique EDM phenomenon may occur via a trans-acting mechanism.


Daisuke Yamashiro, Yutaka Minouchi, Makoto Ashiuchi. Moonlighting role of a poly-gamma-glutamate synthetase component from Bacillus subtilis: insight into novel extrachromosomal DNA maintenance. Applied and environmental microbiology. 2011 Apr;77(8):2796-8

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PMID: 21357437

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