Differential synthesis of novel small protein times Salmonella virulence program.
Differential synthesis of novel small protein times Salmonella virulence program.
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DOI:
10.1371/journal.pgen.1010074
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发表时间:
2022-03
期刊:
影响因子:
4.5
通讯作者:
Groisman EA
中科院分区:
文献类型:
--
作者:
Salvail H;Choi J;Groisman EA
Gene organization in operons enables concerted transcription of functionally related genes and efficient control of cellular processes. Typically, an operon is transcribed as a polycistronic mRNA that is translated into corresponding proteins. Here, we identify a bicistronic operon transcribed as two mRNAs, yet only one allows translation of both genes. We establish that the novel gene ugtS forms an operon with virulence gene ugtL, an activator of the master virulence regulatory system PhoP/PhoQ in Salmonella enterica serovar Typhimurium. Only the longer ugtSugtL mRNA carries the ugtS ribosome binding site and therefore allows ugtS translation. Inside macrophages, the ugtSugtL mRNA species allowing translation of both genes is produced hours before that allowing translation solely of ugtL. The small protein UgtS controls the kinetics of PhoP phosphorylation by antagonizing UgtL activity, preventing premature activation of a critical virulence program. Moreover, S. enterica serovars that infect cold-blooded animals lack ugtS. Our results establish how foreign gene control of ancestral regulators enables pathogens to time their virulence programs. Pathogens must express their virulence genes at precisely the right time to cause disease. Here, we identify a novel small protein that governs a critical virulence program in the pathogen Salmonella enterica serovar Typhimurium (S. Typhimurium). We establish that the novel small protein UgtS prevents the virulence protein UgtL from activating the master virulence regulator PhoP inside macrophages. S. Typhimurium produces two ugtSugtL mRNAs, but only one of them allows ugtS translation. The absence of ugtS from S. enterica serovars that infect cold-blooded animals raises the possibility of UgtS playing a regulatory role during infection of warm-blooded animals. Our findings establish how a horizontally acquired bicistron enables pathogens to time their virulence programs by controlling ancestral regulators.
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影响因子:
4.8
作者:
Gassel, M;Möllenkamp, T;Altendorf, K
通讯作者:
Altendorf, K
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:
14.9
作者:
DAS, A;YANOFSKY, C
通讯作者:
YANOFSKY, C
影响因子:
11.4
作者:
Alix, Eric;Blanc-Potard, Anne-Beatrice
通讯作者:
Blanc-Potard, Anne-Beatrice
影响因子:
3.6
作者:
Choi J;Groisman EA
通讯作者:
Groisman EA