Abstract
The Staphylococcus aureus type VII protein secretion system (T7SS) plays important roles in virulence and intra-species competition. Here we show that the T7SS in strain RN6390 is activated by supplementing the growth medium with haemoglobin, and its cofactor haemin (haem B). Transcript analysis and secretion assays suggest that activation by haemin occurs at a transcriptional and a post-translational level. Loss of T7 secretion activity by deletion of essC results in upregulation of genes required for iron acquisition. Taken together these findings suggest that the T7SS plays a role in iron homeostasis in at least some S. aureus strains.
Original language | English |
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Pages (from-to) | 1839-1850 |
Journal | Microbiology |
Volume | 163 |
Issue number | 12 |
Early online date | 24 Nov 2017 |
DOIs | |
Publication status | Published - 1 Dec 2017 |
Keywords
- Staphylococcus aureus
- Protein secretion
- Iron homeostasis
- RNA-sequencing
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Haem-iron plays a key role in the regulation of the Ess/type VII secretion system of Staphylococcus aureus RN6390 (dataset)
Casabona, M. G. (Creator), Kneuper, H. (Creator), Alferes De Lima, D. (Creator), Harkins, C. (Creator), Zoltner, M. (Creator), Hjerde, E. (Creator), Holden, M. T. G. (Creator) & Palmer, T. (Creator), European Nucleotide Archive (ENA), 26 May 2015
https://www.ebi.ac.uk/ena/data/view/PRJEB8221
Dataset