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Related Experiment Videos

Bacterial transferrin and lactoferrin receptors

S D Gray-Owen1, A B Schryvers

  • 1Dept of Microbiology and Infectious Diseases, Faculty of Medicine, University of Calgary, Alberta, Canada. sdgrayow@acs.ucalgary.ca

Trends in Microbiology
|May 1, 1996
PubMed
Summary

Pathogenic bacteria in the Neisseriaceae and Pasteurellaceae families use outer-membrane receptors to directly absorb iron from host transferrin and lactoferrin. This iron assimilation is crucial for bacterial growth, colonization, and infection.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Pathogenesis

Background:

  • Pathogenic bacteria require iron for growth and survival.
  • Host iron is often sequestered by glycoproteins like transferrin and lactoferrin.
  • Outer-membrane receptors play a role in nutrient acquisition for bacteria.

Purpose of the Study:

  • To describe the novel mechanism of direct iron assimilation from host glycoproteins by Neisseriaceae and Pasteurellaceae.
  • To present a model for this iron uptake process.

Main Methods:

  • Analysis of outer-membrane receptor proteins.
  • Investigation of iron assimilation pathways.
  • Development of a conceptual model.

Main Results:

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  • Identified outer-membrane receptor proteins in Neisseriaceae and Pasteurellaceae responsible for direct iron uptake.
  • Demonstrated the utilization of transferrin and lactoferrin as iron sources.
  • Established the importance of this iron assimilation for bacterial colonization and infection.

Conclusions:

  • Outer-membrane receptors facilitate direct iron assimilation from host transferrin and lactoferrin by pathogenic Neisseriaceae and Pasteurellaceae.
  • This mechanism is a key factor in bacterial pathogenesis and colonization.
  • A model for this novel iron uptake process has been proposed.