NDLI: Specific interaction between OutD, an Erwinia chrysanthemi outer membrane protein of the general secretory pathway, and secreted proteins.

Content Provider	PubMed Central
Author	Robert-baudouy, J. Condemine, G. Shevchik, V. E.
Abstract	OutD is an outer membrane component of the main terminal branch of the general secretory pathway (GSP) in Erwinia chrysanthemi. We analyzed the interactions of OutD with other components of the GSP (Out proteins) and with secreted proteins (PelB, EGZ and PemA). OutD is stabilized by its interaction with another GSP component, OutS. The 62 C-terminal amino acids of OutD are necessary for this interaction. In vivo formation of OutD multimers, up to tetramers, was proved after the dissociation in mild conditions of the OutD aggregates formed in the outer membrane. Thus, OutD could form a channel-like structure in the outer membrane. We showed that OutD is stabilized in vivo when co-expressed with Out-secreted proteins. This stabilization results from the formation of complexes that were detected in experiments of co-immunoprecipitation and co-sedimentation in sucrose density gradients. The presence of the N-terminal part of OutD is required for this interaction. The interaction between OutD and the secreted protein PelB was confirmed in vitro, suggesting that no other component of the GSP is required for this recognition. No interaction was observed between the E. carotovora PelC and the E. chrysanthemi OutD. Thus, the interaction between GspD and the secreted proteins present in the periplasm could be the key to the specificity of the secretion machinery and a trigger for that process.
Related Links	http://dx.doi.org/10.1093/emboj/16.11.3007
Ending Page	3016
Page Count	10
Starting Page	3007
File Format	PDF
ISSN	14602075
e-ISSN	14602075
Journal	The EMBO Journal
Issue Number	11
Volume Number	16
Language	English
Publisher Date	1997-06-01
Access Restriction	Open
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Immunology and Microbiology(all) Neuroscience(all) Molecular Biology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Neuroscience Immunology and Microbiology Medicine Molecular Biology

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