Development of a Stable Shuttle Vector and a Conjugative Transfer System for Gluconobacter oxydans
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概要
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A shuttle vector pGE1 (11.9 kb) which can replicate both in Gluconobacter oxydans and Escherichia coli was constructed from the cryptic Gluconobacter plasmid pGO3293S (9.9 kb, relaxed type) and E. coli plasmid pSUP301 (5 kb, Km^r, Ap^r, relaxed type). The plasmid pGO3293S is one of the endogenous plasmids of G. oxydans IFO 3293 which converts L-sorbose to 2-keto-L-gulonic acid (2KGA), an intermediate of vitamin C synthesis. The other plasmid, pSUP301,is a conjugative plasmid which contains pACYC177 and the mob region from plasmid RP4. The plasmid pGE1 could be transferred into G. oxydans IFO 3293 with a high frequency (10^<-1> transconjugants/recipient) by a conjugal transfer system, and maintained very stably without antibiotic selection. pGE1 can be introduced and maintained in other acetic acid bacteria including Gluconobacter and Acetobacter. The presence of pGE1 did not inhibit the growth or 2KGA productivity of 2KGA-producing strains derived from G. oxydans IFO 3293. The usefulness of pGE1 as a vector was confirmed by subcloning the membrane-bound L-sorbosone dehydrogenase gene of A. liquefaciens IFO 12258 in G. oxydans IFO 3293 derivatives; in this subcloning, pGE1 could be further shortened to the 9.8 kb plasmid, pGE2.
- 公益社団法人日本生物工学会の論文
- 1995-02-25
著者
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SHINJOH MASAKO
Department of Applied Microbiology, Nippon Roche Research Center
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Shinjoh Masako
Department Of Applied Microbiology Nippon Roche Research Center
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Hoshino Tatsuo
Department Of Applied Microbiology Nippon Roche Research Center
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