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• W2517554512 abstract "Summary The branched‐chain amino acids (BCAAs) are vital to both growth and virulence of the human pathogen Staphylococcus aureus . In addition to supporting protein synthesis, the BCAAs serve as precursors for branched‐chain fatty acids (BCFAs), which are predominant membrane fatty acids, and, in association with the global regulatory protein CodY, the BCAAs are key co‐regulators of virulence factors. Despite these critical functions, S. aureus represses Leu and Val synthesis, instead preferring to acquire them from the extracellular milieu. We previously identified BrnQ1 as a BCAA transporter, yet a brnQ1 mutant remained capable of BCAA acquisition. Here, we describe BcaP as an additional BCAA transporter, and determine that it plays a secondary role to BrnQ1 during S. aureus growth in a chemically defined medium. Furthermore, membrane fatty acid composition analysis revealed that BrnQ1, and not BcaP, is required for transporting Leu and Val to be used for iso‐BCFA synthesis. Despite a predominant role for BrnQ1 in vitro , both BrnQ1 and BcaP are required for S. aureus fitness in vivo in a hematogenous spread infection model and a nasal colonisation model. These data demonstrate the importance of BrnQ1 and BcaP for growth, environmental adaptation and virulence of S. aureus ." @default.
• W2517554512 created "2016-09-16" @default.
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• W2517554512 date "2016-09-27" @default.
• W2517554512 modified "2023-10-11" @default.
• W2517554512 title "The role of two branched‐chain amino acid transporters in <scp><i>S</i></scp><i>taphylococcus aureus</i> growth, membrane fatty acid composition and virulence" @default.
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• W2517554512 doi "https://doi.org/10.1111/mmi.13495" @default.
• W2517554512 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6225994" @default.
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• W2517554512 hasPublicationYear "2016" @default.
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