Nonsex genes in the mating type locus of Candida albicans play roles in a/α biofilm formation, including impermeability and fluconazole resistance

Srikantha Thyagarajan, Karla J. Daniels, Claude Pujol, Nidhi Sahni, Song Yi, David R. Soll

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21 Citations (Scopus)

Abstract

The mating type locus (MTL) of Candida albicans contains the mating type genes and has, therefore, been assumed to play an exclusive role in the mating process. In mating-incompetent a/α cells, two of the mating type genes, MTLa1 and MTLα2, encode components of the a1-α2 corepressor that suppresses mating and switching. But the MTL locus of C. albicans also contains three apparently unrelated "nonsex" genes (NSGs), PIK, PAP and OBP, the first two essential for growth. Since it had been previously demonstrated that deleting either the a/α copy of the entire MTL locus, or either MTLa1 or MTLα2, affected virulence, we hypothesized that the NSGs in the MTL locus may also play a role in pathogenesis. Here by mutational analysis, it is demonstrated that both the mating type and nonsex genes in the MTL locus play roles in a/α biofilm formation, and that OBP is essential for impermeability and fluconazole resistance.

Original languageEnglish
Article numbere1002476
JournalPLoS pathogens
Volume8
Issue number1
DOIs
StatePublished - 1 Jan 2012

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Fluconazole
Biofilms
Candida albicans
Genes
Co-Repressor Proteins
Virulence
Growth

Cite this

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abstract = "The mating type locus (MTL) of Candida albicans contains the mating type genes and has, therefore, been assumed to play an exclusive role in the mating process. In mating-incompetent a/α cells, two of the mating type genes, MTLa1 and MTLα2, encode components of the a1-α2 corepressor that suppresses mating and switching. But the MTL locus of C. albicans also contains three apparently unrelated {"}nonsex{"} genes (NSGs), PIK, PAP and OBP, the first two essential for growth. Since it had been previously demonstrated that deleting either the a/α copy of the entire MTL locus, or either MTLa1 or MTLα2, affected virulence, we hypothesized that the NSGs in the MTL locus may also play a role in pathogenesis. Here by mutational analysis, it is demonstrated that both the mating type and nonsex genes in the MTL locus play roles in a/α biofilm formation, and that OBP is essential for impermeability and fluconazole resistance.",
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Nonsex genes in the mating type locus of Candida albicans play roles in a/α biofilm formation, including impermeability and fluconazole resistance. / Thyagarajan, Srikantha; Daniels, Karla J.; Pujol, Claude; Sahni, Nidhi; Yi, Song; Soll, David R.

In: PLoS pathogens, Vol. 8, No. 1, e1002476, 01.01.2012.

Research output: Contribution to journalArticleResearchpeer-review

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