A sorting platform determines the order of protein secretion in bacterial type III systems.

A sorting platform determines the order of protein secretion in bacterial type III systems.
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DOI:
10.1126/science.1201476
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发表时间:
2011-03-04
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Galán JE
Galán JE
中科院分区:
其他
文献类型:
--
作者:
Lara-Tejero M;Kato J;Wagner S;Liu X;Galán JE

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Bacterial type III protein secretion systems deliver effector proteins into eukaryotic cells in order to modulate cellular processes. Central to the function of these protein delivery machines is their ability to recognize and secrete substrates in a defined order. Here, we describe a mechanism by which a type III secretion system from the bacterial enteropathogen Salmonella enterica serovar Typhimurium can sort its substrates prior to secretion. This mechanism involves a cytoplasmic sorting platform that is sequentially loaded with the appropriate secreted proteins. The sequential loading of this platform, facilitated by customized chaperones, ensures the hierarchy in type III protein secretion. Given the presence of these machines in many important pathogens, these findings can serve as the bases for the development of novel antimicrobial strategies.
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