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Article

Characterization of the exbBD operon of Escherichia coli and the role of ExbB and ExbD in TonB function and stability.

Journal of bacteriology - 1 Aug 1995

Ahmer B M, Thomas M G, Larsen R A, Postle K

Abstract excerpt

TonB protein appears to couple the electrochemical potential of the cytoplasmic membrane to active transport across the essentially unenergized outer membrane of gram-negative bacteria. ExbB protein has been identified as an auxiliary protein in this process. In this paper we show that ExbD protein, encoded by an adjacent gene in the exb cluster at 65', was also required for TonB-dependent energy transduction...

Topics

Alkaline Phosphatase
Bacterial Proteins
Biological Transport
Escherichia coli
Escherichia coli Proteins
Half-Life
Membrane Proteins
Mutation
Operon
Phenotype
Promoter Regions, Genetic

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Recombinant Fusion Proteins

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Identifiers

PMID: 7642501
DOI: 10.1128/jb.177.16.4742-4747.1995
PMCID: PMC177240

Provenance

PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 29 Aug 2026. Prepared record publication-7642501-2026-08-29.1. Manifest publication-graph-cohort-2026-08-29.1.

Source receipt: PubMed via Helena Literature Corpus, retrieved 29 Aug 2026.

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Characterization of the exbBD operon of Escherichia coli and the role of ExbB and ExbD in TonB function and stability.PMID 7642501Read ↗

Mutations in the ExbB cytoplasmic carboxy terminus prevent energy-dependent interaction between the TonB and ExbD periplasmic domains.Semantic proximity Read ↗

Energy transduction between membranes. TonB, a cytoplasmic membrane protein, can be chemically cross-linked in vivo to the outer membrane receptor FepA.Semantic proximity Read ↗

TonB and the gram-negative dilemma.Semantic proximity Read ↗

TonB system, in vivo assays and characterization.Semantic proximity Read ↗

Partial suppression of an Escherichia coli TonB transmembrane domain mutation (delta V17) by a missense mutation in ExbB.Semantic proximity Read ↗

Regions of Escherichia coli TonB and FepA proteins essential for in vivo physical interactions.Semantic proximity Read ↗

His(20) provides the sole functionally significant side chain in the essential TonB transmembrane domain.Semantic proximity Read ↗

Functional Diversity of TonB-Like Proteins in the Heterocyst-Forming Cyanobacterium Anabaena sp. PCC 7120.Semantic proximity Read ↗

Cloning and sequencing of the Haemophilus influenzae exbB and exbD genes.Semantic proximity Read ↗

A second tonB gene in Pseudomonas aeruginosa is linked to the exbB and exbD genes.Semantic proximity Read ↗

Isolation and characterization of a second exe operon required for extracellular protein secretion in Aeromonas hydrophila.Semantic proximity Read ↗

Energetics of colicin import revealed by genetic cross-complementation between the Tol and Ton systems.Semantic proximity Read ↗

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