Display Settings:


Send to:

Choose Destination
See comment in PubMed Commons below
Microb Pathog. 2010 Jul-Aug;49(1-2):1-7. doi: 10.1016/j.micpath.2010.03.010. Epub 2010 Mar 27.

The cvfC operon of Staphylococcus aureus contributes to virulence via expression of the thyA gene.

Author information

  • 1Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 3-1, 7-Chome, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.


The cvfC operon of Staphylococcus aureus comprises four genes, cvfC1, cvfC2, cvfC3, and cvfC4. The cvfC3-disrupted mutant, M1262, produces less hemolysin and has attenuated virulence in silkworms and mice. Although introduction of the cvfC3 gene restores the decreased hemolysin production of M1262, the cvfC operon is more effective for the complementation, suggesting that cvfC operon function is impaired in M1262. In this study, we performed a microarray analysis and identified 21 genes with altered expression in M1262. The expression of virulence genes and metabolic genes, including thyA, was changed in M1262. The decreased expression of thyA in M1262 was restored by introducing a plasmid containing the cvfC operon. Introduction of a thyA gene-containing plasmid in M1262 restored hemolysin production and virulence against silkworms. Both M1262 and a thyA-deletion mutant exhibited slow growth in the presence of the detergent Triton-X 100. The growth defect of M1262 in the presence of Triton-X 100 was restored by the introduction of thyA. These results suggest that the cvfC operon contributes to hemolysin production, detergent resistance, and virulence of S. aureus in host animals via thyA expression.

Copyright 2010 Elsevier Ltd. All rights reserved.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk