Updated Parascedosporium putredinis NO1 Genome
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ABSTRACT:
PROVIDER: PRJEB60285 | ENA |
REPOSITORIES: ENA
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Project description:Sequencing, assembly, and annotation of the Parascedosporium putredinis NO1 Genome
| PRJEB51693 | ENA
Project description:Updated VC N16961 reference genome
| PRJEB22249 | ENA
Project description:Economic valorization of lignocellulose is paramount to realizing a true circular bioeconomy; however, this requires the development of systems and processes to expand the repertoire of bioproducts beyond current renewable fuels, chemicals, and sustainable materials. Parascedosporium putredinis NO1 is an ascomycete that thrived at the later stages of a wheat-straw composting community culture, indicating a propensity to degrade recalcitrant lignin-enriched biomass, but exists within an underrepresented and underexplored fungal lineage. This strain has been proven to be an exciting candidate for the identification of new enzymes targeting recalcitrant components of lignocellulose following the recent discovery of a new lignin β-ether linkage cleaving enzyme. The first genome for the genus Parascedosporium for P. putredinis NO1 genome was sequenced, assembled, and annotated. The genome is 39 Mb in size, consisting of 21 contigs annotated to contain 9.998 protein-coding sequences. The carbohydrate-active enzyme (CAZyme) repertoire was compared to 2570 ascomycete genomes and in detail with Trichoderma reesei, Fusarium oxysporum, and sister taxa Scedosporium boydii. Significant expansion in the oxidative auxiliary activity class of CAZymes was observed in the P. putredinis NO1 genome, resulting from increased sequences encoding putative lytic polysaccharide monooxygenases (LPMOs), oxidative enzymes acting within LPMO redox systems, and lignin-degrading laccases. P. putredinis NO1 scored above the 95th percentile for AA gene density across the ascomycete phylum, suggesting a primarily oxidative strategy for lignocellulose breakdown. Novel structure-based searching approaches were employed, revealing 17 new sequences with structural similarity to LPMO, laccase, and peroxidase sequences and which are potentially new lignocellulose-degrading enzymes.IMPORTANCEAn annotated reference genome has revealed P. putredinis NO1 as a useful resource for the identification of new lignocellulose-degrading enzymes for biorefining of woody plant biomass. Utilizing a "structure-omics"-based searching strategy, we identified new potentially lignocellulose-active sequences that would have been missed by traditional sequence searching methods. These new identifications, alongside the discovery of novel enzymatic functions from this underexplored lineage with the recent discovery of a new phenol oxidase that cleaves the main structural β-O-4 linkage in lignin from P. putredinis NO1, highlight the underexplored and poorly represented family Microascaceae as a particularly interesting candidate worthy of further exploration toward the valorization of high value biorenewable products.
| S-EPMC10714830 | biostudies-literature
Project description:Lignocellulose, the structural component of plant cells, is a major agricultural byproduct and the most abundant terrestrial source of biopolymers on Earth. The complex and insoluble nature of lignocellulose limits its conversion into value-added commodities, and currently, efficient transformation requires expensive pretreatments and high loadings of enzymes. Here, we report on a fungus from the Parascedosporium genus, isolated from a wheat-straw composting community, that secretes a large and diverse array of carbohydrate-active enzymes (CAZymes) when grown on lignocellulosic substrates. We describe an oxidase activity that cleaves the major β-ether units in lignin, thereby releasing the flavonoid tricin from monocot lignin and enhancing the digestion of lignocellulose by polysaccharidase mixtures. We show that the enzyme, which holds potential for the biorefining industry, is widely distributed among lignocellulose-degrading fungi from the Sordariomycetes phylum.
| S-EPMC8106297 | biostudies-literature
Project description:Parascedosporium putredinis NO1 was grown for 4 days on six lignocellulosic substrates: Kraft Lignin (LI), Sugar Cane Bagasse (SC), Rice Straw (RS), Wheat Straw (WS), Wheat Bran (WB), and Empty Fruit Bunches from Palm Oil (EF). Proteins were harvested from the culture supernatant and from the insoluble fraction using a biotin-labelling approach to target the proteins bound to the lignocellulosic substrates.
2023-06-08 | MSV000092129 | MassIVE
Project description:Lignocellulose, the structural component of plant cells, is a major agricultural by-product and the most abundant terrestrial source of biopolymers on Earth. The complex and insoluble nature of lignocellulose limits its conversion into value-added commodities and, currently, efficient transformation requires expensive pre-treatments and high loadings of enzymes. Here we report on lignocellulolytic enzyme discovery from Parascedosporium putredinis NO1 during its deconstruction of wheat straw probing both the cultural supernatant and selecting for proteins bound to insoluble component of the growth culture.
2020-01-06 | MSV000084758 | MassIVE