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Heme utilization by the enterococci.

Debra N Brunson1, José A Lemos1

  • 1Department of Oral Biology, University of Florida College of Dentistry, 1395 Center Drive, Gainesville, FL 32610, United States.

FEMS Microbes
|July 29, 2024
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Summary
This summary is machine-generated.

Enterococci bacteria utilize heme, an iron-containing molecule, to enhance their survival in challenging environments. This heme utilization boosts energy production and protects against damaging reactive oxygen species, increasing pathogen fitness.

Keywords:
biofilmcatalasecytochromesenterococcihomepathophysiology

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Area of Science:

  • Microbiology and Molecular Biology
  • Host-Pathogen Interactions
  • Bacterial Physiology

Background:

  • Heme, an iron-containing molecule, plays crucial roles in biological systems, including oxygen transport and enzymatic functions.
  • Enterococci are Gram-positive bacteria, commonly found in the gastrointestinal tract, with some species acting as opportunistic pathogens.
  • While enterococci do not synthesize heme, certain species possess proteins that utilize heme, enhancing their adaptability.

Purpose of the Study:

  • To review the significance of heme utilization in enterococci, focusing on the human pathogen *Enterococcus faecalis*.
  • To assess the prevalence of hemoproteins across the *Enterococcus* genus using bioinformatics.
  • To highlight the role of the heme-*E. faecalis* relationship in host-pathogen dynamics and bacterial interactions.

Main Methods:

  • Literature review on the significance of heme in enterococci.
  • Bioinformatic analysis to determine the distribution of hemoproteins within the *Enterococcus* genus.
  • Synthesis of recent research findings on heme's role in *E. faecalis* pathogenesis.

Main Results:

  • Several *Enterococcus* species encode proteins that utilize heme as a cofactor, enhancing bacterial fitness.
  • Heme utilization contributes to more efficient aerobic respiration and provides protection against reactive oxygen species.
  • Bioinformatic analysis reveals the prevalence of hemoproteins across various *Enterococcus* species.

Conclusions:

  • Heme acquisition and utilization are critical for the adaptability and pathogenicity of certain enterococci.
  • The heme-*E. faecalis* interaction is central to understanding host-pathogen dynamics and interspecies bacterial communication.
  • Further research into heme metabolism in enterococci can reveal novel therapeutic targets.