title: Visualization of interactions between siderophore transporters and the energizing protein TonB by native PAGE.
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.
authors.affiliation: Département Récepteurs et Protéines Membranaires, UMR7175-LC1, ESBS, Illkirch, France.
authors.forename: Souhaila
authors.initials: S
authors.lastname: Choul-Li
authors.forename: Hendrik
authors.initials: H
authors.lastname: Adams
authors.forename: Franc
authors.initials: F
authors.lastname: Pattus
authors.forename: Hervé
authors.initials: H
authors.lastname: Celia
mesh_terms: D001425:Bacterial Outer Membrane Proteins / Q000737:chemistry*; D001426:Bacterial Proteins / Q000737:chemistry*; D004591:Electrophoresis, Polyacrylamide Gel / Q000379:methods*; D008565:Membrane Proteins / Q000737:chemistry*; D017262:Siderophores / Q000378:metabolism
chemical_list: D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; C082326:FpvA protein, Pseudomonas aeruginosa; D008565:Membrane Proteins; D017262:Siderophores; C057616:tonB protein, Bacteria