Truncation of MAT1-2-7 deregulates developmental pathways associated with sexual reproduction in Huntiella omanensis

Show simple item record Wilson, Andi M. Wingfield, Michael J. Wingfield, Brenda D. 2023-09-18T13:18:17Z 2023-09-18T13:18:17Z 2022-09-26
dc.description.abstract The MAT1-1-1 and MAT1-2-1 genes are thought to be the master regulators of sexual development in most ascomycete fungi, and they are often essential for this process. In contrast, it has been suggested that the secondary mating-type genes act to calibrate the sexual cycle and can be dispensable. Recent functional characterization of genes such as Aspergillus fumigatus MAT1-2-4, Huntiella omanensis MAT1-2-7, and Botrytis cinerea MAT1-1-5 has, however, shown that these secondary genes may play more central roles in the sexual pathway and are essential for the production of mature fruiting structures. We used a comparative transcriptome sequencing (RNAseq) experiment to show that the truncation of MAT1-2-7 in the wood inhabiting H. omanensis residing in the Ceratocystidaceae is associated with the differential expression of approximately 25% of all the genes present in the genome, including the transcriptional regulators ste12, wc-2, sub1, VeA, HMG8, and pro1. This suggests that MAT1-2-7 may act as a transcription factor and that DMAT1-2-7 mutant sterility is the result of layered deregulation of a variety of signaling and developmental pathways. This study is one of only a few that details the functional characterization of a secondary MAT gene in a nonmodel species. Given that this gene is present in other Ceratocystidaceae species and that there are diverse secondary MAT genes present throughout the Pezizomycotina, further investigation into this gene and others like it will provide a clearer understanding of sexual development in these eukaryotes. IMPORTANCE Secondary mating-type genes are being described almost as quickly as new fungal genomes are being sequenced. Understanding the functions of these genes has lagged behind their description, in part due to limited taxonomic distribution, lack of conserved functional domains, and difficulties with regard to genetic manipulation protocols. This study aimed to address this by investigating a novel mating-type gene, MAT1- 2-7, for which two independent mutant strains were generated in a previous study. We characterized the molecular response to the truncation of this gene in a nonmodel, wood-infecting fungus and showed that it resulted in widespread differential expression throughout the transcriptome of this fungus. This suggests that secondary MAT genes may play a more important role than previously thought. This study also emphasizes the need for further research into the life cycles of nonmodel fungi, which often exhibit unique features that are very different from the systems understood from model species. en_US
dc.description.department Biochemistry en_US
dc.description.department Forestry and Agricultural Biotechnology Institute (FABI) en_US
dc.description.department Genetics en_US
dc.description.department Microbiology and Plant Pathology en_US
dc.description.librarian am2023 en_US
dc.description.sponsorship The University of Pretoria, the Department of Science and Technology (DST)/National Research Foundation (NRF) Centre of Excellence in Tree Health Biotechnology (CTHB) as well as B.D. Wingfield’s DST/NRF SARChI chair in Fungal Genomics and A. M. Wilson’s DST/NRF Scarce Skills Postdoctoral Fellowship. en_US
dc.description.uri en_US
dc.identifier.citation Wilson, A.M., Wingfield, M.J., Wingfield, B.D. 2022, 'Truncation of MAT1-2-7 deregulates developmental pathways associated with sexual reproduction in huntiella omanensis', Microbiology Spectrum, vol. 10, no. 5, pp. 1-15. DOI : 10.1128/spectrum.01425-22 en_US
dc.identifier.issn 2165-0497
dc.identifier.other 10.1128/spectrum.01425-22
dc.language.iso en en_US
dc.publisher American Society for Microbiology en_US
dc.rights © 2022 Wilson et al. This is an openaccess article distributed under the terms of the Creative Commons Attribution 4.0 International license. en_US
dc.subject CRISPR-Cas9 en_US
dc.subject Functional characterization en_US
dc.subject Fungal genetics en_US
dc.subject MAT gene en_US
dc.subject MAT locus en_US
dc.subject MAT1-2-7 en_US
dc.subject RNA-seq en_US
dc.subject Sexual reproduction en_US
dc.title Truncation of MAT1-2-7 deregulates developmental pathways associated with sexual reproduction in Huntiella omanensis en_US
dc.type Article en_US

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