Ubiquitin and ubiquitin-modified proteins activate the Pseudomonas aeruginosa T3SS cytotoxin, ExoU.
Ubiquitin and ubiquitin-modified proteins activate the Pseudomonas aeruginosa T3SS cytotoxin, ExoU.
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DOI:
10.1111/j.1365-2958.2011.07904.x
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发表时间:
2011-12
影响因子:
3.6
通讯作者:
Frank DW
中科院分区:
文献类型:
--
作者:
Anderson DM;Schmalzer KM;Sato H;Casey M;Terhune SS;Haas AL;Feix JB;Frank DW
Pseudomonas aeruginosa is an opportunistic Gram-negative pathogen that possesses a type III secretion system (T3SS) critical for evading innate immunity and establishing acute infections in compromised patients. Our research has focused on the structure-activity relationships of ExoU, the most toxic and destructive type III effector produced by P. aeruginosa. ExoU posseses phospholipase activity, which is detectable in vitro only when a eukaryotic cofactor is provided with membrane substrates. We report here that a subpopulation of ubiquitylated yeast SOD1 and other ubiquitylated mammalian proteins activate ExoU. Phospholipase activity was detected using purified ubiquitin of various chain lengths and linkage types; however, free monoubiquitin is sufficient in a genetically engineered dual expression system. The use of ubiquitin by a bacterial enzyme as an activator is unprecedented and represents a new aspect in the manipulation of the eukaryotic ubiquitin system to facilitate bacterial replication and dissemination.
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影响因子:
6.7
作者:
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通讯作者:
Peeters, Nemo
影响因子:
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Jubelin G;Taieb F;Duda DM;Hsu Y;Samba-Louaka A;Nobe R;Penary M;Watrin C;Nougayrède JP;Schulman BA;Stebbins CE;Oswald E
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Oswald E
DOI:
10.1073/pnas.90.6.2320
发表时间:
1993-03-15
影响因子:
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通讯作者:
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影响因子:
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通讯作者:
Haas, AL
影响因子:
3.4
作者:
Haraga, A;Miller, SI
通讯作者:
Miller, SI