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首页> 外文期刊>Journal of bacteriology >Facile autoplast generation and transformation in Bacillus thuringiensis subsp. kurstaki.
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Facile autoplast generation and transformation in Bacillus thuringiensis subsp. kurstaki.

机译:苏云金芽孢杆菌亚种中便捷的原生质体生成和转化库尔斯塔基。

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We describe a method for maximizing the rate of conversion of Bacillus thuringiensis subsp. kurstaki vegetative cells to osmotically fragile forms in the absence of exogenously added enzymes. Optimal generation of autoplasts occurred in 50 mM sodium acetate buffer (pH 7.0) at 37 degrees C with 10% (wt/vol) polyethylene glycol as an osmotic stabilizer. The maximum autolytic rate resulted in a conversion of greater than 90% of bacilli to spherical autoplasts in 6 min. Autoplasts regained bacillary morphology upon plating on DM3-G regeneration medium, with reversion frequencies ranging from 1.2 x 10(-1) to 5.3 x 10(-3). The autoplasts could efficiently take up exogenously added plasmid DNA. The presence of plasmids was verified by Southern hybridization analysis.
机译:我们描述了一种最大化苏云金芽孢杆菌亚种转化率的方法。在没有外源添加的酶的情况下,库尔斯塔奇(Kurstaki)的营养细胞呈渗透性脆性形式。在50 mM乙酸钠缓冲液(pH 7.0)中,在37摄氏度下,以10%(wt / vol)聚乙二醇作为渗透稳定剂,可产生最佳的自体塑料。最大的自溶速率导致6分钟内大于90%的细菌转化为球形自体。电镀在DM3-G再生培养基上后,自体塑料恢复了细菌形态,回复频率范围为1.2 x 10(-1)至5.3 x 10(-3)。原生质体可以有效地吸收外源添加的质粒DNA。通过Southern杂交分析证实了质粒的存在。

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