Journal
RESEARCH IN MICROBIOLOGY
Volume 163, Issue 4, Pages 297-307Publisher
ELSEVIER
DOI: 10.1016/j.resmic.2012.02.005
Keywords
Candida glabrata; Biofilm; Adhesin; Chromatin; Silencing
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Funding
- Institut Pasteur [PTR173]
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Biofilm formation plays an important role in fungal pathogenesis. In this work, we used a genetic screen in order to identify and characterize genes involved in the formation of biofilms by the opportunistic fungal pathogen Candida glabrata. We identified the Cst6p transcription factor as a negative regulator of the EPA6 gene that encodes an adhesin central to C. glabrata biofilm formation. Analysis of single and double mutant strains showed that Cst6p acts in a pathway independent of the Yak1/Sir4 pathway also known to regulate expression of EPA6 and consequently biofilm formation. In contrast, we showed that the chromatin remodelling Swi/Snf complex positively regulates biofilm formation in C. glabrata. RT-qPCR experiments demonstrated that EPA6 expression, and thus biofilm formation, depends on the integrity of the Sir complex. Finally, we showed that Swi/Snf-dependent regulation of biofilm formation is adhesin-specific. (C) 2012 Institut Pasteur. Published by Elsevier Masson SAS. All rights reserved.
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