Grf10 and Bas1 Regulate Transcription of Adenylate and One-Carbon Biosynthesis Genes and Affect Virulence in the Human Fungal Pathogen <named-content content-type="genus-species">Candida albicans</named-content>

ABSTRACT Candida albicans is an opportunistic human fungal pathogen that causes superficial fungal infections and lethal systemic infections. To colonize and establish infections, C. albicans coordinates the expression of virulence and metabolic genes. Previous work showed that the homeodomain trans...

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Autores principales:	Tanaporn Wangsanut, Anup K. Ghosh, Peter G. Metzger, William A. Fonzi, Ronda J. Rolfes
Formato:	article
Lenguaje:	EN
Publicado:	American Society for Microbiology 2017
Materias:	Bas1 Candida albicans Grf10 fungal pathogen one-carbon metabolism purine metabolism Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/474d36707be44f49b1816c40fa82c926
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spelling	oai:doaj.org-article:474d36707be44f49b1816c40fa82c9262021-11-15T15:22:04ZGrf10 and Bas1 Regulate Transcription of Adenylate and One-Carbon Biosynthesis Genes and Affect Virulence in the Human Fungal Pathogen <named-content content-type="genus-species">Candida albicans</named-content>10.1128/mSphere.00161-172379-5042https://doaj.org/article/474d36707be44f49b1816c40fa82c9262017-08-01T00:00:00Zhttps://journals.asm.org/doi/10.1128/mSphere.00161-17https://doaj.org/toc/2379-5042ABSTRACT Candida albicans is an opportunistic human fungal pathogen that causes superficial fungal infections and lethal systemic infections. To colonize and establish infections, C. albicans coordinates the expression of virulence and metabolic genes. Previous work showed that the homeodomain transcription factor Grf10 is required for formation of hyphae, a virulence factor. Here we report global gene expression analysis of a grf10Δ strain using a DNA microarray and identify genes for de novo adenylate biosynthesis (ADE genes), one-carbon metabolism, and a nucleoside permease (NUP). Upregulation of these genes in response to adenine limitation required both Grf10 and the myb protein Bas1, as shown by quantitative real-time PCR (qRT-PCR). Phenotypic analysis showed that both mutants exhibited growth defects when grown in the absence of adenine, and the doubling time was slower for the bas1Δ mutant. Bas1 is required for basal expression of these genes, whereas NUP expression is more dependent upon Grf10. Disruption of BAS1 led to only modest defects in hypha formation and weak attenuation of virulence in a systemic mouse model of infection, as opposed to the previously reported strong effects found in the grf10Δ mutant. Our data are consistent with a model in which Grf10 coordinates metabolic effects on nucleotide metabolism by interaction with Bas1 and indicate that AMP biosynthesis and its regulation are important for C. albicans growth and virulence. IMPORTANCE Candida albicans is a commensal and a common constituent of the human microbiota; however, it can become pathogenic and cause infections in both immunocompetent and immunocompromised people. C. albicans exhibits remarkable metabolic versatility as it can colonize multiple body sites as a commensal or pathogen. Understanding how C. albicans adapts metabolically to each ecological niche is essential for developing novel therapeutic approaches. Purine metabolism has been targeted pharmaceutically in several diseases; however, the regulation of this pathway has not been fully elucidated in C. albicans. Here, we report how C. albicans controls the AMP de novo biosynthesis pathway in response to purine availability. We show that the lack of the transcription factors Grf10 and Bas1 leads to purine metabolic dysfunction, and this dysfunction affects the ability of C. albicans to establish infections.Tanaporn WangsanutAnup K. GhoshPeter G. MetzgerWilliam A. FonziRonda J. RolfesAmerican Society for MicrobiologyarticleBas1Candida albicansGrf10fungal pathogenone-carbon metabolismpurine metabolismMicrobiologyQR1-502ENmSphere, Vol 2, Iss 4 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Bas1 Candida albicans Grf10 fungal pathogen one-carbon metabolism purine metabolism Microbiology QR1-502
spellingShingle	Bas1 Candida albicans Grf10 fungal pathogen one-carbon metabolism purine metabolism Microbiology QR1-502 Tanaporn Wangsanut Anup K. Ghosh Peter G. Metzger William A. Fonzi Ronda J. Rolfes Grf10 and Bas1 Regulate Transcription of Adenylate and One-Carbon Biosynthesis Genes and Affect Virulence in the Human Fungal Pathogen <named-content content-type="genus-species">Candida albicans</named-content>
description	ABSTRACT Candida albicans is an opportunistic human fungal pathogen that causes superficial fungal infections and lethal systemic infections. To colonize and establish infections, C. albicans coordinates the expression of virulence and metabolic genes. Previous work showed that the homeodomain transcription factor Grf10 is required for formation of hyphae, a virulence factor. Here we report global gene expression analysis of a grf10Δ strain using a DNA microarray and identify genes for de novo adenylate biosynthesis (ADE genes), one-carbon metabolism, and a nucleoside permease (NUP). Upregulation of these genes in response to adenine limitation required both Grf10 and the myb protein Bas1, as shown by quantitative real-time PCR (qRT-PCR). Phenotypic analysis showed that both mutants exhibited growth defects when grown in the absence of adenine, and the doubling time was slower for the bas1Δ mutant. Bas1 is required for basal expression of these genes, whereas NUP expression is more dependent upon Grf10. Disruption of BAS1 led to only modest defects in hypha formation and weak attenuation of virulence in a systemic mouse model of infection, as opposed to the previously reported strong effects found in the grf10Δ mutant. Our data are consistent with a model in which Grf10 coordinates metabolic effects on nucleotide metabolism by interaction with Bas1 and indicate that AMP biosynthesis and its regulation are important for C. albicans growth and virulence. IMPORTANCE Candida albicans is a commensal and a common constituent of the human microbiota; however, it can become pathogenic and cause infections in both immunocompetent and immunocompromised people. C. albicans exhibits remarkable metabolic versatility as it can colonize multiple body sites as a commensal or pathogen. Understanding how C. albicans adapts metabolically to each ecological niche is essential for developing novel therapeutic approaches. Purine metabolism has been targeted pharmaceutically in several diseases; however, the regulation of this pathway has not been fully elucidated in C. albicans. Here, we report how C. albicans controls the AMP de novo biosynthesis pathway in response to purine availability. We show that the lack of the transcription factors Grf10 and Bas1 leads to purine metabolic dysfunction, and this dysfunction affects the ability of C. albicans to establish infections.
format	article
author	Tanaporn Wangsanut Anup K. Ghosh Peter G. Metzger William A. Fonzi Ronda J. Rolfes
author_facet	Tanaporn Wangsanut Anup K. Ghosh Peter G. Metzger William A. Fonzi Ronda J. Rolfes
author_sort	Tanaporn Wangsanut
title	Grf10 and Bas1 Regulate Transcription of Adenylate and One-Carbon Biosynthesis Genes and Affect Virulence in the Human Fungal Pathogen <named-content content-type="genus-species">Candida albicans</named-content>
title_short	Grf10 and Bas1 Regulate Transcription of Adenylate and One-Carbon Biosynthesis Genes and Affect Virulence in the Human Fungal Pathogen <named-content content-type="genus-species">Candida albicans</named-content>
title_full	Grf10 and Bas1 Regulate Transcription of Adenylate and One-Carbon Biosynthesis Genes and Affect Virulence in the Human Fungal Pathogen <named-content content-type="genus-species">Candida albicans</named-content>
title_fullStr	Grf10 and Bas1 Regulate Transcription of Adenylate and One-Carbon Biosynthesis Genes and Affect Virulence in the Human Fungal Pathogen <named-content content-type="genus-species">Candida albicans</named-content>
title_full_unstemmed	Grf10 and Bas1 Regulate Transcription of Adenylate and One-Carbon Biosynthesis Genes and Affect Virulence in the Human Fungal Pathogen <named-content content-type="genus-species">Candida albicans</named-content>
title_sort	grf10 and bas1 regulate transcription of adenylate and one-carbon biosynthesis genes and affect virulence in the human fungal pathogen <named-content content-type="genus-species">candida albicans</named-content>
publisher	American Society for Microbiology
publishDate	2017
url	https://doaj.org/article/474d36707be44f49b1816c40fa82c926
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Grf10 and Bas1 Regulate Transcription of Adenylate and One-Carbon Biosynthesis Genes and Affect Virulence in the Human Fungal Pathogen <named-content content-type="genus-species">Candida albicans</named-content>

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