Mycobacterium tuberculosis MycP1 protease plays a dual role in regulation of ESX-1 secretion and virulence.
Mycobacterium tuberculosis MycP1 protease plays a dual role in regulation of ESX-1 secretion and virulence.
复制标题
DOI:
10.1016/j.chom.2010.02.006
复制
发表时间:
2010-03-18
影响因子:
30.3
通讯作者:
Cox JS
中科院分区:
文献类型:
--
作者:
Ohol YM;Goetz DH;Chan K;Shiloh MU;Craik CS;Cox JS
Mycobacterium tuberculosis uses the ESX-1 secretion system to deliver virulence proteins during infection of host cells. Here we report a novel post-transcriptional control mechanism of ESX-1 mediated by MycP1, a serine protease. We show that MycP1 is required for ESX-1 secretion and has unusual substrate specificity. Unexpectedly, inhibition of protease activity increases secretion of ESX-1 substrates. We demonstrate that EspB, an ESX-1 substrate required for secretion, is a target of MycP1 in vitro and in vivo. During macrophage infection, an inactive MycP1 protease mutant causes hyper-activation of ESX-1 stimulated innate signaling pathways. MycP1 is required for growth in mice during acute infection, while protease inhibition leads to attenuated virulence during chronic infection. As the key ESX-1 substrates ESAT-6 and CFP-10 are highly immunogenic, fine-tuning of their secretion by MycP1 may balance virulence and immune detection and be essential for successful maintenance of long-term M. tuberculosis infection.
登录
查看更多内容
影响因子:
64.5
作者:
JULIUS, D;BRAKE, A;THORNER, J
通讯作者:
THORNER, J
影响因子:
4.4
作者:
Dietrich, Jes;Andersen, Claire;Andersen, Peter
通讯作者:
Andersen, Peter
DOI:
10.1073/pnas.0504922102
发表时间:
2005-07-26
影响因子:
11.1
作者:
Fortune, SM;Jaeger, A;Rubin, EJ
通讯作者:
Rubin, EJ
影响因子:
3.2
作者:
Converse, SE;Cox, JS
通讯作者:
Cox, JS
影响因子:
4.2
作者:
Dave, Joel A.;Gey van Pittius, Nicolaas Claudius;Brown, Gordon D.
通讯作者:
Brown, Gordon D.