This domain is found in ExsE present in Pseudomonas aeruginosa. ExsE forms part of the ExsACDE signaling cascade which acts as an important regulatory switch that ensures timely expression of the Type III secretion system (T3SS) and so plays a critic ...
This domain is found in ExsE present in Pseudomonas aeruginosa. ExsE forms part of the ExsACDE signaling cascade which acts as an important regulatory switch that ensures timely expression of the Type III secretion system (T3SS) and so plays a critical role in facilitating infection. Prior to host-cell contact, the T3SS is inactive and ExsE and Type III Secretion Chaperone (ExsC) form a stable complex. ExsC forms a compact homodimer and ExsE wraps around one face of this dimer [1].
This family consists of a number of bacterial sequences which are highly similar to the Tir chaperone protein in E. Coli. In many Gram-negative bacteria, a key indicator of pathogenic potential is the possession of a specialised type III secretion sy ...
This family consists of a number of bacterial sequences which are highly similar to the Tir chaperone protein in E. Coli. In many Gram-negative bacteria, a key indicator of pathogenic potential is the possession of a specialised type III secretion system, which is utilised to deliver virulence effector proteins directly into the host cell cytosol. Many of the proteins secreted from such systems require small cytosolic chaperones to maintain the secreted substrates in a secretion-competent state. CesT serves a chaperone function for the enteropathogenic Escherichia coli (EPEC) translocated intimin receptor (Tir) protein, which confers upon EPEC the ability to alter host cell morphology following intimate bacterial attachment [1]. This family also contains several DspF and related sequences from several plant pathogenic bacteria. The "disease-specific" (dsp) region next to the hrp gene cluster of Erwinia amylovora is required for pathogenicity but not for elicitation of the hypersensitive reaction. DspF and AvrF are small (16 kDa and 14 kDa) and acidic with predicted amphipathic alpha helices in their C termini; they resemble chaperones for virulence factors secreted by type III secretion systems of animal pathogens [2].
