Fungal Genetics and Biology
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Expressed sequence tags and genes associated with loline alkaloid expression by the fungal endophyte Neotyphodium uncinatum
Loline alkaloids (LA), which are 1-aminopyrrolizidines with an oxygen bridge, are produced by Epichloe¨ (anamorph=Neotyphodium) species, endophytes of grasses. LA are insecticidal, thus, helping to protect host plants from insect herbivory. The objective of this study was to identify genes associate...
A high-affinity ammonium transporter from the mycorrhizal ascomycete Tuber borchii
An ammonium transporter cDNA, named TbAMT1, was isolated from the ectomycorrhizal ascomycetous truffle Tuber borchii. The polypeptide encoded by TbAMT1 (52kDa) functionally complements ammonium uptake-defective yeast mutants and shares sequence similarity with previously characterized ammonium transp...
Distribution and localization of microsatellites in the Perigord black truffle genome and identification of new molecular markers.
We surveyed the T. melanosporum genome (1) to characterise its SSR pattern; (2) to compare it with SSR patterns found in 48 other fungal and three oomycetes genomes and (3) to identify new polymorphic SSR markers for population genetics. The T. melanosporum genome is rich in SSRs with 22,425 SSRs wi...
Hyphal and cytoskeleton polarization in Tuber melanosporum: a genomic and cellular analysis.
We have explored the Tuber melanosporum genome sequence by searching for homologs of genes known to play crucial roles in the morphogenesis and cell polarity of yeasts and filamentous fungi. One hundred and forty-nine genes have been identified and functionally grouped according to the deduced amino...
Fusarium graminearum PKS14 is involved in orsellinic acid and orcinol synthesis.
We focused on PKS14, which has only been shown to be expressed during plant infections or when cultivated on rice or corn meal (RM) based media. To enhance the production of the resulting product we introduced a constitutive promoter in front of PKS14 and cultivated two of the resulting mutants on R...
The protein phosphatase PhzA of A. fumigatus is involved in oxidative stress tolerance and fungal virulence.
Protein phosphatases Z that are unique to the fungal kingdom have been associated to resistance to high salt concentration, cell wall integrity, cell cycle regulation, and oxidative stress in fungi. In Aspergillus fumigatus, it was shown that PHZA is under the control of the transcription factor Skn...
Distribution, expression and expansion of Aspergillus fumigatus LINE-like retrotransposon populations in clinical and environmental isolates...
We investigate, in clinical and environmental isolates, the structure and distribution of a specific class of A. fumigatus long interspersed nuclear element (LINE)-like retrotransposons occupying subtelomeric loci in the A. fumigatus genome, and probe their stability in response to laboratory- and h...
Comparative analysis of mitochondrial genomes from closely related Rhynchosporium species reveals extensive intron invasion.
We sequenced and annotated the complete mitochondrial (mt) genomes of four closely related Rhynchosporium species that diverged ∼14,000-35,000years ago. During this time frame, three of the mt genomes expanded significantly due to an invasion of introns into three genes (cox1, cox2, and nad5). The e...