Systematic analysis, by the yeast two-hybrid, of protein interaction between components of the type II secretory machinery of Erwinia chrysanthemi.
Type II systems allow for the secretion of numerous enzymes and toxins in several Gram-negative pathogens. In Erwinia chrysanthemi, 14 Out proteins are necessary for building the type II apparatus. We performed a systematic two-hybrid analysis to test interactions between the periplasmic regions of the Out proteins. Results obtained using this approach suggested that OutJ (a pseudopilin) was able to interact with (i) OutD, the outer membrane secretin, (ii) OutI, mainly located in the periplasm, and (iii) OutL, an inner membrane protein. Taken together, these results suggest that OutJ is involved in multiple partnerships. Implications of these partnerships in the overall architecture of the type II secretion machinery are discussed.
Laboratoire de Chimie Bactérienne, CNRS, 31, Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France.
Vanessa
V
Douet
Laurent
L
Loiseau
Frédéric
F
Barras
Béatrice
B
Py
D001425:Bacterial Outer Membrane Proteins / Q000235:genetics / Q000378:metabolism*; D016974:Dickeya chrysanthemi / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D020798:Two-Hybrid System Techniques
D001425:Bacterial Outer Membrane Proteins