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Staphylococcus aureus spreads on soft agar surfaces and forms giant colonies. Here, we examined the inhibitory role of extracellular DNA on the colony spreading activity. The double-deletion mutation of nuc1 and nuc2, which encode secretory nucleases, increased extracellular DNA and showed a decreased ability to form giant colonies. The addition of DNase I or micrococcal nuclease to the soft agar...
Staphylococcus aureus spreads on soft agar surfaces, which is called “colony spreading”. Here, we report that the colony spreading in S. aureus was promoted by the addition of glucose to soft agar plates. Disruption of ccpA and hprK, which are involved in catabolite repression, decreased the colony spreading ability promoted by glucose. Deletion of the agr locus, a virulence regulatory element whose...
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