Department of Biomedical Sciences, Section of Microbiology, Marche Polytechnic University, Ancona, Italy.
Antimicrob Agents Chemother. 2012 Jan;56(1):591-4. doi: 10.1128/AAC.05352-11. Epub 2011 Oct 10.
In ICESp2905, a widespread erm(TR)- and tet(O)-carrying genetic element of Streptococcus pyogenes, the two resistance determinants are contained in separate fragments inserted into a scaffold of clostridial origin. ICESp2905 (∼65.6 kb) was transferable not only in its regular form but also in a defective form lacking the erm(TR) fragment (ICESp2906, ∼53.0 kb). The erm(TR) fragment was also an independent integrative and conjugative element (ICE) (ICESp2907, ∼12.6 kb). ICESp2905 thus results from one ICE (ICESp2907) being integrated into another (ICESp2906).
在 ICESp2905 中,存在一个广泛传播的携带 erm(TR)和 tet(O)的酿脓链球菌遗传元件,这两个抗性决定簇分别包含在插入梭菌起源支架的不同片段中。ICESp2905(约 65.6 kb)不仅可以以完整形式转移,还可以以缺失 erm(TR)片段的缺陷形式(ICESp2906,约 53.0 kb)转移。erm(TR)片段也是一个独立的整合和共轭元件(ICE)(ICESp2907,约 12.6 kb)。因此,ICESp2905 是由一个 ICE(ICESp2907)整合到另一个 ICE(ICESp2906)中形成的。