Incorporation of the Whole Chromosomal DNA in Protoplast Lysates into Competent Cells of Bacillus subtilis
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概要
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Competent cells of Bacillus subtilis AC870 (purB, leuB, trpC, ald-1) were transformed to Ade^+, Trp^+, or Ade^+ Trp^+ with DNA in protoplast lysates of B.subtilis AC819 (hisH, tet-1,rpsL, smo-1). The cotransfer ratio of purB to trpC was constant at 7-9% (Ade^+ Trp^+/Trp^+) or 3% (Ade^+ Trp^+ /Ade^+) at protoplast concentrations of 2.7×10^3〜2.7×10^6 per ml. The whole chromosomal DNA must be certainly incorporated into competent cells from the following reasons ; (1) purB is opposite to trpC on the chromosome, (2) 2.7×10^3 protoplasts per ml is about 100 times lower than 3.2×10^5 competent cells per ml, and (3) the cotransfer ratio is constant at all the concentrations. Similar results were obtained with the cotransfer ratio of purA to trpC. The transformation requires several Com proteins including ComK.
- 2001-04-23
著者
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Taguchi Hisataka
Department of Applied Microbial Technology, Faculty of Biotechnology and Life Science, Sojo Universi
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Akamatsu Takashi
Department Of Applied Microbial Technology Faculty Of Biotechnology And Life Science Sojo University
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Taguchi Hisataka
Department Of Applied Microbial Technology Faculty Of Biotechnology And Life Science Sojo University
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