Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/111463
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Type: Journal article
Title: Biotin-mediated growth and gene expression in Staphylococcus aureus is highly responsive to environmental biotin
Author: Satiaputra, J.
Eijkelkamp, B.
McDevitt, C.
Shearwin, K.
Booker, G.
Polyak, S.
Citation: Applied Microbiology and Biotechnology, 2018; 102(8):3793-3803
Publisher: Springer Verlag
Issue Date: 2018
ISSN: 0175-7598
1432-0614
Statement of
Responsibility: 
Jiulia Satiaputra, Bart A. Eijkelkamp, Christopher A. McDevitt, Keith E. Shearwin, Grant W. Booker, Steven W. Polyak
Abstract: Biotin (Vitamin B7) is a critical enzyme co-factor in metabolic pathways important for bacterial survival. Biotin is obtained either from the environment or by de novo synthesis, with some bacteria capable of both. In certain species, the bifunctional protein BirA plays a key role in biotin homeostasis as it regulates expression of biotin biosynthetic enzymes in response to biotin demand and supply. Here, we compare the effect of biotin on the growth of two bacteria that possess a bifunctional BirA, namely Escherichia coli and Staphylococcus aureus. Unlike E. coli that could fulfill its biotin requirements through de novo synthesis, S. aureus showed improved growth rates in media supplemented with 10 nM biotin. S. aureus also accumulated more radiolabeled biotin from the media highlighting its ability to efficiently scavenge exogenous material. These data are consistent with S. aureus colonizing low biotin microhabitats. We also demonstrate that the S. aureus BirA protein is a transcriptional repressor of BioY, a subunit of the biotin transporter, and an operon containing yhfT and yhfS, the products of which have a putative role in fatty acid homeostasis. Increased expression of bioY is proposed to help cue S. aureus for efficient scavenging in low biotin environments.
Keywords: Biotin; Gene expression/regulation; Staphylococcus aureus; BirA; Biotin protein ligase
Description: Published online: 5 March 2018
Rights: © Springer-Verlag GmbH Germany, part of Springer Nature 2018
RMID: 0030083636
DOI: 10.1007/s00253-018-8866-z
Grant ID: http://purl.org/au-research/grants/nhmrc/1068885
http://purl.org/au-research/grants/nhmrc/1080784
http://purl.org/au-research/grants/nhmrc/1122582
http://purl.org/au-research/grants/arc/DP160101450
http://purl.org/au-research/grants/arc/DP150101856
http://purl.org/au-research/grants/arc/DP170102102
Appears in Collections:Molecular and Biomedical Science publications

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