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Staphylococcus aureus pigmentation is not controlled by Hfq.

Wenfeng Liu1, Pierre Boudry1, Chantal Bohn1

  • 1Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France.

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|February 9, 2020
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Summary

The Hfq protein does not influence Staphylococcus aureus pigmentation. Our study found that neither the absence nor accumulation of Hfq impacts the bacteria

Keywords:
HfqPigmentationRegulationStaphylococcus aureusStaphyloxanthin

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Area of Science:

  • Microbiology and Molecular Biology
  • Bacterial Pigmentation and Gene Regulation

Background:

  • Staphylococcus aureus exhibits a golden color due to carotenoid pigment synthesis.
  • Hfq protein is a known global posttranscriptional regulator in Gram-negative bacteria, but its role in S. aureus is unclear.
  • Previous research suggested Hfq negatively regulates S. aureus pigmentation, but this was based on correlational observations.

Purpose of the Study:

  • To investigate the actual role of Hfq in the pigmentation of Staphylococcus aureus.
  • To clarify the function of Hfq in S. aureus, specifically regarding carotenoid pigment production.

Main Methods:

  • Construction and analysis of hfq mutants in various S. aureus strains.
  • Observation and comparison of pigmentation in wild-type and hfq mutant strains.
  • Evaluation of the effect of Hfq absence or accumulation on bacterial color.

Main Results:

  • No discernible change in the golden pigmentation of S. aureus was observed in the absence of Hfq.
  • Altering Hfq levels, either through deletion or accumulation, did not affect the production of carotenoid pigments.
  • The study found no correlation between Hfq presence/absence and S. aureus color.

Conclusions:

  • Hfq protein does not play a significant role in regulating the pigmentation of Staphylococcus aureus.
  • The previous hypothesis of Hfq acting as a negative regulator of S. aureus color is not supported by experimental evidence.
  • Further research is needed to identify the true regulators of carotenoid synthesis in S. aureus.