A Francisella novicida pdpA mutant exhibits limited intracellular replication and remains associated with the lysosomal marker LAMP-1.

A Francisella novicida pdpA mutant exhibits limited intracellular replication and remains associated with the lysosomal marker LAMP-1.
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新杀弗朗西斯菌 pdpA 突变体表现出有限的细胞内复制,并且仍然与溶酶体标记物 LAMP-1 相关。

DOI:
10.1099/mic.0.025445-0
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发表时间:
2009
期刊:
Microbiology (Reading, England)
影响因子:
--
通讯作者:
Nano,FrancisE
Nano,FrancisE
中科院分区:
--
文献类型:
--
作者:
Schmerk,CrystalL;Duplantis,BarryN;Howard,PerryL;Nano,FrancisE

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Several genes contained in theFrancisellapathogenicity island (FPI) encode proteins needed for intracellular growth and virulence ofFrancisella tularensis. ThepdpAgene is the first cistron in the larger of the two operons found in the FPI. In this work we studied the intracellular growth phenotype of aFrancisella novicidamutant in thepdpAgene. The ΔpdpAstrain was capable of a small amount of intracellular replication but, unlike wild-typeF. novicida, remained associated with the lysosomal marker LAMP-1, suggesting that PdpA is necessary for progression from the early phagosome phase of infection. Strains within ciscomplementation of the ΔpdpAlesion showed a restoration of intracellular growth to wild-type levels. Infection of macrophages with the ΔpdpAmutant generated a host-cell mRNA profile distinct from that generated by infection with wild-typeF. novicida. The transcriptional response of the host macrophage indicates that PdpA functions directly or indirectly to suppress macrophage ability to signal via growth factors, cytokines and adhesion ligands.
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发表时间: 2009
期刊: Microbiology (Reading, England)
影响因子: --
作者:
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通讯作者: Nano,FrancisE