在核酸外切酶I和V均缺失的大肠杆菌菌株中大肠菌素E1的自发诱导。
Spontaneous induction of colicin E1 in Escherichia coli strains deficient in both exonucleases I and V.
作者信息
Bassett C L, Kushner S R
出版信息
J Bacteriol. 1985 Dec;164(3):1362-5. doi: 10.1128/jb.164.3.1362-1365.1985.
Abstract
Colicin E1 synthesis is spontaneously induced in pRSF2124-carrying strains of Escherichia coli deficient in exonucleases I (sbcB) and V (recB recC). In contrast, the specific activity of beta-lactamase, which is also encoded by pRSF2124, is not affected by the absence of these enzymes. These results suggest that colicin E1 induction is specific and does not result either from a significant change in overall plasmid transcription or copy number. Furthermore, the level of spontaneous induction was similar to that obtained with mitomycin C.
摘要
在缺乏核酸外切酶I（sbcB）和V（recB recC）的携带pRSF2124的大肠杆菌菌株中，大肠杆菌素E1的合成会自发诱导。相比之下，同样由pRSF2124编码的β-内酰胺酶的比活性不受这些酶缺失的影响。这些结果表明，大肠杆菌素E1的诱导是特异性的，并非由整体质粒转录或拷贝数的显著变化所致。此外，自发诱导水平与用丝裂霉素C获得的水平相似。
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