异源脱氧核糖核酸对H群链球菌Challis菌株转化的竞争性抑制作用。
Competitive inhibition of transformation in group H Streptococcus strain Challis by heterologous deoxyribonucleic acid.
作者信息
Ceglowski P, Fuchs P G, Soltyk A
出版信息
J Bacteriol. 1975 Dec;124(3):1621-3. doi: 10.1128/jb.124.3.1621-1623.1975.
Abstract
Glucosylated deoxyribonucleic acid (DNA) from phages T4 and T6 competes poorly with homologous DNA causing only a slight decrease of transformation in Group H Streptococcus strain Challis. Other types of heterologous DNAs (Micrococcus luteus, Clostridium perfringens, Escherichia coli, calf thymus and non-glucosylated phage T6 DNA), in contrast to glucosylated T4 and T6 DNAs, compete with transforming DNA to the normal, high extent. These results indicate that as in transformation of Bacillus subtilis, the presence of glucose attached to 5-hydroxymethylcytosine in phage T6 DNA considerably decreases the interaction of such DNA with competent cells of the Challis strain. It also indicates that the guanine plus cytosine content of DNA is not decisive in determining its interaction with competent cells.
摘要
来自噬菌体T4和T6的糖基化脱氧核糖核酸（DNA）与同源DNA的竞争能力较差，在H群链球菌Challis菌株中仅引起转化略有下降。与糖基化的T4和T6 DNA相比，其他类型的异源DNA（藤黄微球菌、产气荚膜梭菌、大肠杆菌、小牛胸腺和非糖基化噬菌体T6 DNA）与转化DNA的竞争程度正常且较高。这些结果表明，与枯草芽孢杆菌的转化情况一样，噬菌体T6 DNA中与5-羟甲基胞嘧啶相连的葡萄糖的存在大大降低了此类DNA与Challis菌株感受态细胞的相互作用。这也表明DNA中鸟嘌呤加胞嘧啶的含量在决定其与感受态细胞的相互作用时并非决定性因素。
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