Exploring the genomic diversity of black yeasts and relatives (Chaetothyriales, Ascomycota)

Exploring the genomic diversity of black yeasts and relatives (Chaetothyriales, Ascomycota)

Author Teixeira, M. M. Google Scholar
Moreno, L. F. Google Scholar
Stielow, B. J. Google Scholar
Muszewska, A. Google Scholar
Hainaut, M. Google Scholar
Gonzaga, L. Google Scholar
Abouelleil, A. Google Scholar
Patane, J. S. L. Google Scholar
Priest, M. Google Scholar
Souza, R. Google Scholar
Young, S. Google Scholar
Ferreira, K. S. Autor UNIFESP Google Scholar
Zeng, Q. Google Scholar
da Cunha, M. M. L. Google Scholar
Gladki, A. Google Scholar
Barker, B. Google Scholar
Vicente, V. A. Google Scholar
de Souza, E. M. Google Scholar
Almeida, S. Google Scholar
Henrissat, B. Google Scholar
Vasconcelos, A. T. R. Google Scholar
Deng, S. Google Scholar
Voglmayr, H. Google Scholar
Moussa, T. A. A. Google Scholar
Gorbushina, A. Google Scholar
Felipe, M. S. S. Google Scholar
Cuomo, C. A. Google Scholar
de Hoog, G. Sybren Google Scholar
Abstract The order Chaetothyriales (Pezizomycotina, Ascomycetes) harbours obligatorily melanised fungi and includes numerous etiologic agents of chromoblastomycosis, phaeohyphomycosis and other diseases of vertebrate hosts. Diseases range from mild cutaneous to fatal cerebral or disseminated infections and affect humans and cold-blooded animals globally. In addition, Chaetothyriales comprise species with aquatic, rock-inhabiting, ant-associated, and mycoparasitic life-styles, as well as species that tolerate toxic compounds, suggesting a high degree of versatile extremotolerance. To understand their biology and divergent niche occupation, we sequenced and annotated a set of 23 genomes of main the human opportunists within the Chaetothyriales as well as related environmental species. Our analyses included fungi with diverse life-styles, namely opportunistic pathogens and closely related saprobes, to identify genomic adaptations related to pathogenesis. Furthermore, ecological preferences of Chaetothyriales were analysed, in conjuncture with the order-level phylogeny based on conserved ribosomal genes. General characteristics, phylogenomic relationships, transposable elements, sex-related genes, protein family evolution, genes related to protein degradation (MEROPS), carbohydrate-active enzymes (CAZymes), melanin synthesis and secondary metabolism were investigated and compared between species. Genome assemblies varied from 25.81 Mb (Capronia coronata) to 43.03 Mb (Cladophialophora immunda). The bantiana-clade contained the highest number of predicted genes (12 817 on average) as well as larger genomes. We found a low content of mobile elements, with DNA transposons from Tc1/Mariner superfamily being the most abundant across analysed species. Additionally, we identified a reduction of carbohydrate degrading enzymes, specifically many of the Glycosyl Hydrolase (GH) class, while most of the Pectin Lyase (PL) genes were lost in etiological agents of chromoblastomycosis and phaeohyphomycosis. An expansion was found in protein degrading peptidase enzyme families S12 (serine-type D-Ala-D-Ala carboxypeptidases) and M38 (isoaspartyl dipeptidases). Based on genomic information, a wide range of abilities of melanin biosynthesis was revealed

genes related to metabolically distinct DHN, DOPA and pyomelanin pathways were identified. The MAT (MAting Type) locus and other sex-related genes were recognized in all 23 black fungi. Members of the asexual genera Fonsecaea and Cladophialophora appear to be heterothallic with a single copy of either MAT-1-1 or MAT-1-2 in each individual. All Capronia species are homothallic as both MAT1-1 and MAT1-2 genes were found in each single genome. The genomic synteny of the MAT-locus flanking genes (SLA2-APN2-COX13) is not conserved in black fungi as is commonly observed in Eurotiomycetes, indicating a unique genomic context for MAT in those species. The heterokaryon (het) genes expansion associated with the low selective pressure at the MAT-locus suggests that a parasexual cycle may play an important role in generating diversity among those fungi.
Keywords Black yeast
Comparative genomics
xmlui.dri2xhtml.METS-1.0.item-coverage Utrecht
Language English
Sponsor National Institute of Science and Technology of Nitrogen Fixation/CNPq/MCT
Fundacao Araucaria
National Human Genome Research Institute
King Abdulaziz University, Jeddah
National Science Centre (Poland)
Grant number National Institute of Science and Technology of Nitrogen Fixation/CNPq/MCT: 573828/2008-3
National Human Genome Research Institute: U54HG003067
CNPq/FAP-DF: 193000569/2009
CAPES: 1331-13-2
King Abdulaziz University, Jeddah: 30-130-36-RG
National Science Centre (Poland): 2012/07/D/NZ2/04286
Date 2017
Published in Studies In Mycology. Utrecht, v. , n. 86, p. 1-28, 2017.
ISSN 0166-0616 (Sherpa/Romeo, impact factor)
Publisher Centraalbureau Schimmelculture
Extent 1-28
Origin http://dx.doi.org/10.1016/j.simyco.2017.01.001
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000411880700001
URI https://repositorio.unifesp.br/handle/11600/54944

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