RNA chaperone activates Salmonella virulence program during infection.
RNA chaperone activates Salmonella virulence program during infection.
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DOI:
10.1093/nar/gkab992
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发表时间:
2021-11-18
影响因子:
14.9
通讯作者:
Groisman EA
中科院分区:
文献类型:
--
作者:
Choi J;Salvail H;Groisman EA
Organisms often harbor seemingly redundant proteins. In the bacterium Salmonella enterica serovar Typhimurium (S. Typhimurium), the RNA chaperones CspC and CspE appear to play redundant virulence roles because a mutant lacking both chaperones is attenuated, whereas mutants lacking only one exhibit wild-type virulence. We now report that CspC—but not CspE—is necessary to activate the master virulence regulator PhoP when S. Typhimurium experiences mildly acidic pH, such as inside macrophages. This CspC-dependent PhoP activation is specific to mildly acidic pH because a cspC mutant behaves like wild-type S. Typhimurium under other PhoP-activating conditions. Moreover, it is mediated by ugtL, a virulence gene required for PhoP activation inside macrophages. Purified CspC promotes ugtL translation by disrupting a secondary structure in the ugtL mRNA that occludes ugtL’s ribosome binding site. Our findings demonstrate that proteins that are seemingly redundant actually confer distinct and critical functions to the lifestyle of an organism. RNA chaperone CspC promotes translation of virulence gene ugtL by disrupting secondary structure in ugtL mRNA leader, thereby advancing Salmonella virulence program directed by PhoP/PhoQ inside a macrophage phagosome.
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影响因子:
5.6
作者:
Chamnongpol, S;Groisman, EA
通讯作者:
Groisman, EA
DOI:
10.1073/pnas.86.18.7077
发表时间:
1989-09-01
影响因子:
11.1
作者:
GROISMAN, EA;CHIAO, E;HEFFRON, F
通讯作者:
HEFFRON, F
影响因子:
10.5
作者:
Desnoyers, Guillaume;Masse, Eric
通讯作者:
Masse, Eric
影响因子:
3.6
作者:
Choi J;Groisman EA
通讯作者:
Groisman EA
DOI:
10.1073/pnas.120163297
发表时间:
2000-06-06
影响因子:
11.1
作者:
Datsenko, KA;Wanner, BL
通讯作者:
Wanner, BL