Pathogenic ubiquitination of GSDMB inhibits NK cell bactericidal functions.
Pathogenic ubiquitination of GSDMB inhibits NK cell bactericidal functions.
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DOI:
10.1016/j.cell.2021.04.036
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发表时间:
2021-06-10
期刊:
影响因子:
64.5
通讯作者:
Alto NM
中科院分区:
文献类型:
--
作者:
Hansen JM;de Jong MF;Wu Q;Zhang LS;Heisler DB;Alto LT;Alto NM
Gasdermin B (GSDMB) belongs to a large family of pore forming cytolysins that execute inflammatory cell death programs. While genetic studies have linked GSDMB polymorphisms to human disease, its function in the immunological response to pathogens remains poorly understood. Here, we report a dynamic host-pathogen conflict between GSDMB and the IpaH7.8 effector protein secreted by enteroinvasive Shigella flexneri. We show that IpaH7.8 ubiquitinates and targets GSDMB for 26S proteasome destruction. This virulence strategy protects Shigella from the bacteriocidic activity of Natural Killer cells by suppressing Granzyme-A mediated activation of GSDMB. In contrast to the canonical function of most Gasdermin-family members, GSDMB does not inhibit Shigella by lysing host cells. Rather, it exhibits direct microbiocidal activity through recognition of phospholipids found on Gram-negative bacterial membranes. These findings place GSDMB as a central executioner of intracellular bacterial killing and reveals a mechanism employed by pathogens to counteract this host defense system. Repurposing a cell death mechanism for antibacterial defense, human immune cells combat infection by punching holes in bacterial membranes. A human pathogen has evolved a way to fight back.
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影响因子:
28.3
作者:
de Jong, Maarten F.;Liu, Zixu;Chen, Didi;Alto, Neal M.
通讯作者:
Alto, Neal M.
影响因子:
32.4
作者:
Evavold CL;Ruan J;Tan Y;Xia S;Wu H;Kagan JC
通讯作者:
Kagan JC
影响因子:
3.6
作者:
Ashida, Hiroshi;Toyotome, Takahito;Sasakawa, Chihiro
通讯作者:
Sasakawa, Chihiro
DOI:
10.1073/pnas.1607769113
发表时间:
2016-07-12
影响因子:
11.1
作者:
Aglietti, Robin A.;Estevez, Alberto;Dueber, Erin C.
通讯作者:
Dueber, Erin C.
DOI:
10.1084/jem.139.5.1189
发表时间:
1974-05-01
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Carter PB;Collins FM
通讯作者:
Collins FM