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Genome sequence of the filamentous soil fungus Chaetomium cochliodes reveals abundance of genes for heme enzymes from all peroxidase and catalase superfamilies. (2016) BMC Genomics 17, 763.
Zamocky M, Tafer H, Chovanova K, Lopandic K, Kamlarova A, Obinger C
Abstract: BACKGROUND: The ascomycetous family Chaetomiaceae (class Sordariomycetes) includes numerous soilborn, saprophytic, endophytic and pathogenic fungi which can adapt to various growth conditions and living niches by providing a broad armory of oxidative and antioxidant enzymes. RESULTS: We release the 34.7 Mbp draft genome of Chaetomium cochliodes CCM F-232 consisting of 6036 contigs with an average size of 5756 bp and reconstructed its phylogeny. We show that this filamentous fungus is closely related but not identical to Chaetomium globosum and Chaetomium elatum. We screened and critically analysed this genome for open reading frames coding for essential antioxidant enzymes. It is demonstrated that the genome of C. cochliodes contains genes encoding putative enzymes from all four known heme peroxidase superfamilies including bifunctional catalase-peroxidase (KatG), cytochrome c peroxidase (CcP), manganese peroxidase, two paralogs of hybrid B peroxidases (HyBpox), cyclooxygenase, linoleate diol synthase, dye-decolorizing peroxidase (DyP) of type B and three paralogs of heme thiolate peroxidases. Both KatG and DyP-type B are shown to be introduced into ascomycetes genomes by horizontal gene transfer from various bacteria. In addition, two putative large subunit secretory and two small-subunit typical catalases are found in C. cochliodes. We support our genomic findings with quantitative transcription analysis of nine peroxidase & catalase genes. CONCLUSIONS: We delineate molecular phylogeny of five distinct gene superfamilies coding for essential heme oxidoreductases in Chaetomia and from the transcription analysis the role of this antioxidant enzymatic armory for the survival of a peculiar soil ascomycete in various harsh environments.

Chaetomium cochliodes CCM F-232

[ Opisthokonta | Fungi | Dikarya | . . .
. . . | Sordariales | Chaetomiaceae | Chaetomium ]

Chaetomium_cochliodes_CCM_F_232 Picture Source
Taxonomy:Eukaryota | Opisthokonta | Fungi | Dikarya | Ascomycota | saccharomyceta | Pezizomycotina | leotiomyceta | sordariomyceta | Sordariomycetes | Sordariomycetidae | Sordariales | Chaetomiaceae | Chaetomium
Synonym:Chaetomium cochlioides
Ncbi Go to NCBI Taxonomy (904709)
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Publications:1853
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