Assembly of the Type III Secretion Apparatus of Enteropathogenic Escherichia coli
نویسندگان
چکیده
منابع مشابه
Assembly of the type III secretion apparatus of enteropathogenic Escherichia coli.
Enteropathogenic Escherichia coli (EPEC) secretes many Esps (E. coli-secreted proteins) and effectors via the type III secretion (TTS) system. We previously identified a novel needle complex (NC) composed of a basal body and a needle structure containing an expandable EspA sheath-like structure as a central part of the EPEC TTS apparatus. To further investigate the structure and protein compone...
متن کاملType III secretion-dependent hemolytic activity of enteropathogenic Escherichia coli.
Enteropathogenic Escherichia coli (EPEC) was found to exhibit a type III secretion-dependent, contact-mediated, hemolytic activity requiring the EspA, EspB, and EspD secreted proteins. EspB and EspD display homology to pore-forming molecules. Our data suggest a mechanism to explain the requirement for all three Esp proteins in the transfer of EPEC proteins, such as Tir, into target cells.
متن کاملSecretin of the enteropathogenic Escherichia coli type III secretion system requires components of the type III apparatus for assembly and localization.
At least 16 proteins are thought to be involved in forming the enteropathogenic Escherichia coli (EPEC) type III translocation apparatus which delivers virulence factors into host cells, yet their function and location have not been determined. A biochemical analysis was performed on three components: EscN, a predicted cytoplasmic ATPase; EscV, a predicted inner membrane protein; and EscC, a pr...
متن کاملTranslocated intimin receptor and its chaperone interact with ATPase of the type III secretion apparatus of enteropathogenic Escherichia coli.
Few interactions have been reported between effectors and components of the type III secretion apparatus, although many interactions have been demonstrated between type III effectors and their cognate chaperones. It is thought that chaperones may play a role in directing effectors to the type III secretion apparatus. The ATPase FliI in the flagellar assembly apparatus plays a pivotal role in in...
متن کاملDegP is involved in Cpx-mediated posttranscriptional regulation of the type III secretion apparatus in enteropathogenic Escherichia coli.
The Cpx envelope stress response facilitates adaptation to envelope stresses that lead to the misfolding of periplasmic proteins. Cpx-mediated adaptation involves elevated expression of periplasmic proteases and chaperones. Previously, we demonstrated that induction of the Cpx envelope stress response in enteropathogenic Escherichia coli (EPEC) also results in inhibition of type III secretion (...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 2006
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.188.8.2801-2811.2006