ClpB mutants of Francisella tularensis subspecies holarctica and tularensis are defective for type VI secretion and intracellular replication.

ClpB mutants of Francisella tularensis subspecies holarctica and tularensis are defective for type VI secretion and intracellular replication.
复制标题

DOI:
10.1038/s41598-018-29745-4
复制
发表时间:
2018-07-27
期刊:
影响因子:
4.6
通讯作者:
Sjöstedt A
Sjöstedt A
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Alam A;Golovliov I;Javed E;Sjöstedt A

文献摘要

参考文献

被引文献

相似文献

土拉热弗朗西丝菌是一种高度感染性的细胞内细菌,具有非典型VI型分泌系统(T6SS),该系统对细菌的毒力至关重要。最近的数据表明,热休克蛋白100家族成员,ClpB,是参与T6 SS拆卸的亚种弗朗西斯novicida。在这里,我们研究了ClpB的作用的T6 SS的功能和人类致病亚种holarctica和tularensis的表型特征。与野生型菌株相比,人活疫苗菌株LVS(属于全北极亚种)和高毒力SCHU S4菌株(属于土拉热亚种)的EclpB突变体均显示出对热休克和低pH的极端敏感性、严重受损的VI型分泌(T6S)以及显著但受损的细胞内复制。此外,它们表现出基本上完整的吞噬体逃逸。小鼠感染表明,两种ΔclpB突变体都是高度减毒的,但SCHU S4突变体显示出比LVS菌株更有效的复制。总的来说,我们的数据表明,ClpB在F中执行多种功能。土拉热菌亚种holarctica和土拉热菌,其功能对于T6S、细胞内复制和毒力是重要的。
Francisella tularensis, a highly infectious, intracellular bacterium possesses an atypical type VI secretion system (T6SS), which is essential for the virulence of the bacterium. Recent data suggest that the HSP100 family member, ClpB, is involved in T6SS disassembly in the subspecies Francisella novicida. Here, we investigated the role of ClpB for the function of the T6SS and for phenotypic characteristics of the human pathogenic subspecies holarctica and tularensis. The ∆clpB mutants of the human live vaccine strain, LVS, belonging to subspecies holarctica, and the highly virulent SCHU S4 strain, belonging to subspecies tularensis, both showed extreme susceptibility to heat shock and low pH, severely impaired type VI secretion (T6S), and significant, but impaired intracellular replication compared to the wild-type strains. Moreover, they showed essentially intact phagosomal escape. Infection of mice demonstrated that both ΔclpB mutants were highly attenuated, but the SCHU S4 mutant showed more effective replication than the LVS strain. Collectively, our data demonstrate that ClpB performs multiple functions in the F. tularensis subspecies holarctica and tularensis and its function is important for T6S, intracellular replication, and virulence.
DOI: 10.1074/jbc.m114.600510
发表时间: 2014-11-21
期刊: The Journal of biological chemistry
影响因子: --
作者:
Förster A;Planamente S;Manoli E;Lossi NS;Freemont PS;Filloux A
通讯作者: Filloux A
DOI: 10.1016/j.cell.2015.02.005
发表时间: 2015-02-26
期刊: Cell
影响因子: 64.5
作者:
Clemens DL;Ge P;Lee BY;Horwitz MA;Zhou ZH
通讯作者: Zhou ZH
DOI: 10.1128/iai.01344-10
发表时间: 2011-09-01
影响因子: 3.1
作者:
Broms, Jeanette E.;Lavander, Moa;Sjostedt, Anders
通讯作者: Sjostedt, Anders
DOI: 10.1002/mbo3.9
发表时间: 2012-03
期刊: MICROBIOLOGYOPEN
影响因子: 3.4
作者:
Aschtgen, Marie-Stephanie;Zoued, Abdelrahim;Lloubes, Roland;Journet, Laure;Cascales, Eric
通讯作者: Cascales, Eric
DOI: 10.1080/21505594.2016.1258507
发表时间: 2017-08-18
期刊: Virulence
影响因子: 5.2
作者:
Bröms JE;Meyer L;Sjöstedt A
通讯作者: Sjöstedt A