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Energy-coupled transport and signal transduction through the Gram-negative outer membrane via TonB-ExbB-ExbD-dependent receptor proteins
Open accessAbstract
Iron in the form of ferric siderophore complexes and vitamin B12 are transported through the outer membrane of Gram-negative bacteria by a mechanism which consumes energy. There is no known energy source in the outer membrane or in the adjacent periplasmic space so that energy is provided by the electrochemical potential across the cytoplasmic membrane. Energy flows from the cytoplasmic into the outer membrane via a complex consisting of the TonB, ExbB and ExbD proteins which are anchored in the cytoplasmic membrane. It is proposed that the TonB--ExbB--ExbD complex opens--via an energized conformation of the TonB protein--channels in the outer membrane, formed by proteins which serves as highly specific binding sites for the various ferric siderophores and vitamin B12. In addition, outer membrane receptors together with the TonB--ExbB--ExbD complex are directly involved in induction of the transcription of ferric citrate and pseudobactin transport genes of Escherichia coli and Pseudomonas putida, respectively.
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Cites
The proton motive force drives the outer membrane transport of cobalamin in Escherichia coli
Bradbeer, C. (1993) · Journal of Bacteriology · doi:10.1128/jb.175.10.3146-3150.1993 · Cited by 188
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Crystal structure of the outer membrane active transporter FepA from Escherichia coli.
Buchanan (1999) · Nature Structural Biology · doi:10.1038/4931 · Cited by 591
Transmembrane Signaling across the Ligand-Gated FhuA Receptor
Locher, K. P., Rees, B., Koebnik, R., Mitschler, A., Moulinier, L., Rosenbusch, J. P., & Moras, D. (1998) · Cell · doi:10.1016/s0092-8674(00)81700-6 · Cited by 540
Iron acquisition strategies of bacterial pathogens
Sheldon, J. R., Laakso, H. A., & Heinrichs, D. E. (2016) · Microbiology Spectrum · doi:10.1128/microbiolspec.vmbf-0010-2015 · Cited by 219
Bacterial heme-transport proteins and their heme-coordination modes
Tong, Y., & Guo, M. (2009) · Archives of Biochemistry and Biophysics · doi:10.1016/j.abb.2008.10.013 · Cited by 162
Processing of Heme and Heme-Containing Proteins by Bacteria
Stojiljkovic, I., & Perkins-Balding, D. (2002) · DNA and Cell Biology · doi:10.1089/104454902753759708 · Cited by 134
Metadata
- Authors
- Braun, V
- Venue
- FEMS Microbiology Reviews
- Publisher
- Wiley
- Published
- 1995-07
- Volume
- 16
- Issue
- 4
- Pages
- 295-307
- ISSN
- 0168-6445 (ISSN-L)
- OpenAlex
- W2102319161
- Cited by
- 355
- References
- 1
- FWCI
- 12.37
- Type
- journal article
- Language
- en
- Open access
- bronze
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- CoChat. (2026). Citation check: Energy-coupled transport and signal transduction through the Gram-negative outer membrane via TonB-ExbB-ExbD-dependent receptor proteins. https://app.cochat.ai/papers/10.1016/0168-6445(95)00003-u
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- Braun, V. (1995). Energy-coupled transport and signal transduction through the Gram-negative outer membrane via TonB-ExbB-ExbD-dependent receptor proteins. FEMS Microbiology Reviews. https://doi.org/10.1016/0168-6445(95)00003-u
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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