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Visualization of interactions between siderophore transporters and the energizing protein TonB by native PAGE
Author(s) -
ChoulLi Souhaila,
Adams Hendrik,
Pattus Franc,
Celia Hervé
Publication year - 2008
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.200700612
Subject(s) - bacterial outer membrane , transporter , membrane protein , bacteria , solubilization , membrane transport protein , biochemistry , biology , polyacrylamide gel electrophoresis , chemistry , organism , biophysics , membrane , escherichia coli , genetics , enzyme , gene
Abstract Horizontal nondenaturing electrophoresis of proteins in polyacrylamide gels was used to observe specific interactions between membrane proteins. The method was particularly well suited for solubilized transporters of the outer membrane of Gram‐negative bacteria, and allowed specific complexes of transporter and the inner‐membrane protein TonB to be isolated. We have used this method to investigate the interactions between four different outer‐membrane transporters, and the TonB proteins from two different organisms. The results show that a stable complex can be isolated on gels for all the proteins studied, but can depend in some cases of the detergent used for solubilization. Furthermore, we observe cross‐species interaction as TonB from a given organism can interact with transporters from another organism.