胆汁诱导肠炎沙门氏菌鼠伤寒血清型毒力质粒的消除
Bile-induced curing of the virulence plasmid in Salmonella enterica serovar Typhimurium.
作者信息
García-Quintanilla Meritxell, Prieto Ana I, Barnes Laurent, Ramos-Morales Francisco, Casadesús Josep
机构信息
Departamento de Genética, Facultad de Biología, Universidad de Sevilla, Apartado 1095, E-41080 Seville, Spain.
出版信息
J Bacteriol. 2006 Nov;188(22):7963-5. doi: 10.1128/JB.00995-06. Epub 2006 Sep 8.
Abstract
Exposure to bile induces curing of the virulence plasmid in Salmonella enterica serovar Typhimurium (pSLT). Disruption of the ccdB gene increases pSLT curing, both spontaneous and induced by bile, suggesting that the pSLT ccdAB genes may encode a homolog of the CcdAB addiction module previously described in the F sex factor. Unlike the F sex factor, synthesis of pSLT-encoded pili does not confer bile sensitivity. These observations may provide insights into the evolution of virulence plasmids in Salmonella subspecies I, as well as the causes of virulence plasmid loss in other Salmonella subspecies.
摘要
暴露于胆汁会诱导肠炎沙门氏菌鼠伤寒血清型（pSLT）中的毒力质粒治愈。ccdB基因的破坏会增加pSLT的治愈，包括自发治愈和胆汁诱导的治愈，这表明pSLT ccdAB基因可能编码先前在F性因子中描述的CcdAB成瘾模块的同源物。与F性因子不同，pSLT编码的菌毛合成不会导致胆汁敏感性。这些观察结果可能为深入了解沙门氏菌亚种I中毒力质粒的进化以及其他沙门氏菌亚种中毒力质粒丢失的原因提供线索。
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