The capBCA Locus is Required for Intracellular Growth of Francisella tularensis LVS.
The capBCA Locus is Required for Intracellular Growth of Francisella tularensis LVS.
复制标题
DOI:
10.3389/fmicb.2011.00083
复制
发表时间:
2011
影响因子:
5.2
通讯作者:
Zhang JR
中科院分区:
文献类型:
--
作者:
Su J;Asare R;Yang J;Nair MK;Mazurkiewicz JE;Abu-Kwaik Y;Zhang JR
Francisella tularensis is the causative agent of tularemia and a category A bioterrorism agent. The molecular basis for the extreme virulence of F. tularensis remains unclear. Our recent study found that capBCA, three neighboring genes, are necessary for the infection of F. tularensis live vaccine strain (LVS) in a respiratory infection mouse model. We here show that the capBCA genes are necessary for in vivo growth of F. tularensis LVS in the lungs, spleens, and livers of BALB/c mice. Unmarked deletion of capBCA in type A strain Schu S4 resulted in significant attenuation in virulence although the level of the attenuation in Schu S4 was much less profound than in LVS. We further demonstrated that CapB protein is produced at a low level under the in vitro culture conditions, and capB alone is necessary for in vivo growth of F. tularensis LVS in the lungs of BALB/c mice. Finally, deletional mutations in capB alone or capBCA significantly impaired intracellular growth of F. tularensis LVS in cultured macrophages, thus suggesting that the capBCA genes are necessary for intracellular adaptation of F. tularensis. The requirement of this gene locus in intracellular adaption at least in part explains the significant attenuation of F. tularensis capBCA mutants in virulence.
登录
查看更多内容
DOI:
10.1073/pnas.0601838103
发表时间:
2006-09-26
影响因子:
11.1
作者:
Checroun, Claire;Wehrly, Tara D.;Celli, Jean
通讯作者:
Celli, Jean
DOI:
10.1196/annals.1409.001
发表时间:
2007-01-01
期刊:
FRANCISELLA TULARENSIS: BIOLOGY, PATHOGENICITY, EPIDEMIOLOGY, AND BIODEFENSE
影响因子:
--
作者:
Clemens, Daniel L.;Horwitz, Marcus A.
通讯作者:
Horwitz, Marcus A.
影响因子:
3.1
作者:
Bonquist, Linda;Lindgren, Helena;Sjostedt, Anders
通讯作者:
Sjostedt, Anders
DOI:
10.1196/annals.1409.010
发表时间:
2007-01-01
期刊:
FRANCISELLA TULARENSIS: BIOLOGY, PATHOGENICITY, EPIDEMIOLOGY, AND BIODEFENSE
影响因子:
--
作者:
Barker, Jeffrey R.;Klose, Karl E.
通讯作者:
Klose, Karl E.
影响因子:
2.8
作者:
Candela, Thomas;Moya, Marie;Fouet, Agnes
通讯作者:
Fouet, Agnes