The mitochondrial view of Blastocladiella emersonii

Tambor, José Humberto Machado; Ribichich, Karina Fabiana; Gomes, Suely L.

doi:10.1016/j.gene.2008.07.031

Cited by 14 publications

(8 citation statements)

References 54 publications

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“…Pcls E was detected only in the cox1 gene of Ganoderma leucocontextum (MH252534) (Li et al 2019e ). However, it was present in the cox1 gene of the distantly related aquatic species Blastocladiella emersonii (Tambor et al 2008 ) which belongs to the phylum Blastocladiomycota , a situation not readily explained as horizontal gene transfer between fungi which grow in such different environments seems improbable. In the two Paxillus species, we detected three group I introns, which belonged to different Pcls, indicating great variation of introns between them.…”

Section: Resultsmentioning

confidence: 99%

Comparative mitogenome analysis of two ectomycorrhizal fungi (Paxillus) reveals gene rearrangement, intron dynamics, and phylogeny of basidiomycetes

Ren

Xiang

et al. 2020

IMA Fungus

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In this study, the mitogenomes of two Paxillus species were assembled, annotated and compared. The two mitogenomes of Paxillus involutus and P. rubicundulus comprised circular DNA molecules, with the size of 39,109 bp and 41,061 bp, respectively. Evolutionary analysis revealed that the nad4L gene had undergone strong positive selection in the two Paxillus species. In addition, 10.64 and 36.50% of the repetitive sequences were detected in the mitogenomes of P. involutus and P. rubicundulus, respectively, which might transfer between mitochondrial and nuclear genomes. Large-scale gene rearrangements and frequent intron gain/loss events were detected in 61 basidiomycete species, which revealed large variations in mitochondrial organization and size in Basidiomycota. In addition, the insertion sites of the basidiomycete introns were found to have a base preference. Phylogenetic analysis of the combined mitochondrial gene set gave identical and well-supported tree topologies, indicating that mitochondrial genes were reliable molecular markers for analyzing the phylogenetic relationships of Basidiomycota. This study is the first report on the mitogenomes of Paxillus, which will promote a better understanding of their contrasted ecological strategies, molecular evolution and phylogeny of these important ectomycorrhizal fungi and related basidiomycete species.

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Section: Resultsmentioning

confidence: 99%

Comparative mitogenome analysis of two ectomycorrhizal fungi (Paxillus) reveals gene rearrangement, intron dynamics, and phylogeny of basidiomycetes

Ren

Xiang

et al. 2020

IMA Fungus

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“…In the present report, the model of study is Blastocladiella emersonii, an aquatic fungus that belongs to the Blastocladiomycetes class, being located at the base of the fungal phylogenetic tree (18,44). The life cycle of B. emersonii starts with the zoospore, a nongrowing motile cell that is responsible for the dispersal of the fungus.…”

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confidence: 99%

Transcriptional Response to Hypoxia in the Aquatic Fungus Blastocladiella emersonii

Camilo

Gomes

2010

Eukaryot Cell

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Global gene expression analysis was carried out with Blastocladiella emersonii cells subjected to oxygen deprivation (hypoxia) using cDNA microarrays. In experiments of gradual hypoxia (gradual decrease in dissolved oxygen) and direct hypoxia (direct decrease in dissolved oxygen), about 650 differentially expressed genes were observed. A total of 534 genes were affected directly or indirectly by oxygen availability, as they showed recovery to normal expression levels or a tendency to recover when cells were reoxygenated. In addition to modulating many genes with no putative assigned function, B. emersonii cells respond to hypoxia by readjusting the expression levels of genes responsible for energy production and consumption. At least transcriptionally, this fungus seems to favor anaerobic metabolism through the upregulation of genes encoding glycolytic enzymes and lactate dehydrogenase and the downregulation of most genes coding for tricarboxylic acid (TCA) cycle enzymes. Furthermore, genes involved in energy-costly processes, like protein synthesis, amino acid biosynthesis, protein folding, and transport, had their expression profiles predominantly downregulated during oxygen deprivation, indicating an energy-saving effort. Data also revealed similarities between the transcriptional profiles of cells under hypoxia and under iron(II) deprivation, suggesting that Fe 2؉ ion could have a role in oxygen sensing and/or response to hypoxia in B. emersonii. Additionally, treatment of fungal cells prior to hypoxia with the antibiotic geldanamycin, which negatively affects the stability of mammalian hypoxia transcription factor HIF-1␣, caused a significant decrease in the levels of certain upregulated hypoxic genes.Oxygen is essential for the survival of most eukaryotic organisms due to its crucial role in important biochemical and physiological processes, including energy production (in the form of ATP) from glucose by aerobic metabolism. In nature, oxygen deprivation challenges can occur with a significantly high frequency, depending on the organism lifestyle. Accordingly, organisms have evolved a complex set of cellular and molecular adaptive responses activated by decreases in oxygen availability (hypoxia or anoxia). These responses are adaptive because they can lead to changes in the physiological and metabolic status of the cells, which will allow them to cope with the stress associated with oxygen limitation and ultimately enhance cellular survival. Especially in aquatic habitats, hypoxia can be an important evolutionary driving force, resulting in both convergent and divergent physiological strategies for survival under low-oxygen conditions.The unicellular eukaryote Saccharomyces cerevisiae has been used as a model system to understand many basic cellular functions and biochemical processes in eukaryotic systems. Hypoxia response studies are not an exception. Yeast responds to changes in O 2 availability by altering the expression of a number of oxygen-responsive genes, consisting of hypoxic genes that are trans...

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“…Phylogenetic analysis showed that Blastocladiella sp. exhibited a close relationship with Allomyces macrogynus (Paquin and Lang 1996) and Blastocladiella emersonii (Tambor et al 2008) (Figure 1).…”

Section: Blastocladiella; Mitochondrial Genome; Phylogenetic Analysismentioning

confidence: 94%

Mitochondrial genome characterization and phylogenetic analysis of Blastocladiella sp. (Blastocladiales: Blastocladiaceae)

Wang

Liu

2020

Mitochondrial DNA Part B

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In the present study, the complete mitochondrial genome of an early diverging fungus Blastocladiella sp. was assembled by the next-generation sequencing. The complete mitochondrial genome of Blastocladiella sp. is 33, 800 bp in length and consists of 11,620 (34.38%) adenine, 5,047 (14.93%) cytosine, 6,025 (17.83%) guanosine and 11,108 (32.86%) thymine. The genome contains 19 protein-coding genes, 24 tRNA genes and 2 rRNA genes. Phylogenetic analysis based on the combined mitochondrial gene set showed that Blastocladiella sp. has a close relationship with Allomyces macrogynus and Blastocladiella emersonii.

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The mitochondrial view of Blastocladiella emersonii

Cited by 14 publications

References 54 publications

Comparative mitogenome analysis of two ectomycorrhizal fungi (Paxillus) reveals gene rearrangement, intron dynamics, and phylogeny of basidiomycetes

Comparative mitogenome analysis of two ectomycorrhizal fungi (Paxillus) reveals gene rearrangement, intron dynamics, and phylogeny of basidiomycetes

Transcriptional Response to Hypoxia in the Aquatic Fungus Blastocladiella emersonii

Mitochondrial genome characterization and phylogenetic analysis of Blastocladiella sp. (Blastocladiales: Blastocladiaceae)

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