The AirSR two-component system contributes to Staphylococcus aureus survival in human blood and transcriptionally regulates sspABC operon.
The AirSR two-component system contributes to Staphylococcus aureus survival in human blood and transcriptionally regulates sspABC operon.
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DOI:
10.3389/fmicb.2015.00682
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发表时间:
2015
影响因子:
5.2
通讯作者:
Ji Y
中科院分区:
文献类型:
--
作者:
Hall JW;Yang J;Guo H;Ji Y
To date, genes identified and transcriptionally regulated by the AirSR TCS have been involved in energy production and cellular homeostasis of the staphylococcal cell. It is well accepted that the state of cellular metabolism impacts the expression of virulence factors in Staphylococcus aureus. For this reason, we conducted experiments to determine if the AirSR TCS contributes to the pathogenesis of S. aureus using an antisense RNA interference technology, an inducible overexpression system, and gene deletions. Depletion of AirSR by antisense RNA expression or deletion of the genes, results in significant decrease in bacterial survival in human blood. Conversely, overexpression of AirR significantly promotes survival of S. aureus in blood. AirR promotes the secretion of virulence factors that inhibits opsonin-based phagocytosis. This enhanced survival is partially linked to the transcriptional regulation of the sspABC operon, encoding V8 protease (SspA), staphopain B (SspB) and staphostatin B (SspC). SspA and SspB are known virulence factors which proteolytically digest opsonins and inhibit killing of S. aureus by professional phagocytes. This is the first evidence linking the AirSR TCS to pathogenesis of S. aureus.
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影响因子:
2.6
作者:
Yan M;Yu C;Yang J;Ji Y
通讯作者:
Ji Y
DOI:
10.1074/jbc.m113.502039
发表时间:
2013-10-11
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Chen C;Krishnan V;Macon K;Manne K;Narayana SV;Schneewind O
通讯作者:
Schneewind O
影响因子:
3.2
作者:
Jones, Richard C.;Deck, Joanna;Hart, Mark E.
通讯作者:
Hart, Mark E.
DOI:
10.1128/cdli.10.4.616-621.2003
发表时间:
2003-07-01
期刊:
CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY
影响因子:
--
作者:
Kim, KH;Yu, JU;Nahm, MH
通讯作者:
Nahm, MH
影响因子:
3.6
作者:
Hammerstrom, Troy G.;Roh, Jung Hyeob;Koehler, Theresa M.
通讯作者:
Koehler, Theresa M.