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Reconstruction and analysis genome-scale metabolic model of thermophilic fungus Myceliophthora thermophila

ABSTRACT: Reconstruction and analysis genome-scale metabolic model of thermophilic fungus Myceliophthora thermophila

PROVIDER: PRJNA763100 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15886248_1.fastq.gz	Fastqsanger.gz
	SRR15886248_2.fastq.gz	Fastqsanger.gz
	SRR15886249_1.fastq.gz	Fastqsanger.gz
	SRR15886249_2.fastq.gz	Fastqsanger.gz
	SRR15886250_1.fastq.gz	Fastqsanger.gz

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Reconstruction and analysis genome-scale metabolic model of thermophilic fungus Myceliophthora thermophila

Project description:Myceliophthora thermophila is a thermophilic fungus with great biotechnological characteristics for industrial applications, which can degrade and utilize all major polysaccharides in plant biomass. Nowadays, it has been developing into a platform for production of enzyme, commodity chemicals and biofuels. Therefore, an accurate genome-scale metabolic model would be an accelerator for this fungus becoming a universal chassis for biomanufacturing. Here we present a genome-scale metabolic model for M. thermophila constructed using an auto-generating pipeline with consequent thorough manual curation. Temperature plays a basic and critical role for the microbe growth. we are particularly interested in the genome wide response at metabolic layer of M. thermophilia as it is a thermophlic fungus. To study the effects of temperature on metabolic characteristics of M. thermophila growth, the fungus was cultivated under different temperature. The metabolic rearrangement predicted using context-specific GEMs integrating transcriptome data.The developed model provides new insights into thermophilic fungi metabolism and highlights model-driven strain design to improve biotechnological applications of this thermophilic lignocellulosic fungus.

2022-09-14 | GSE184074 | GEO

Development of a glucoamylase hyper-production platform in thermophilic fungus Myceliophthora thermophila via the rational redesigning and engineering manipulation

Project description:The development of proteins hyper-production platform in thermophilic fungus Myceliophthora thermophila is essential for both molecular basis understanding and industrial process. Herein the glucoamylase hyper-production strain MtGM12 was generated from our previously strain MtYM6 via genetically engineering. Transcriptional profiling analyses revealed that the amylolytic gene expression levels were significantly up-regulated in the MtGM12 than in MtWT.

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Transcriptomic response to substrate and temperature in two thermophilic fungi, Myceliophthora thermophila and Thielavia terrestris, and a related mesophile, Chaetomium globosum

Project description:The thermophilic filamentous fungi Myceliophthora thermophila (Sporotrichum thermophile) and Thielavia terrestris are proficient decomposers of cellulose, suggesting that they will be a rich source of thermostable industrial enzymes for lignocellulose degradation. To identify the genes and proteins involved in this process, we explored the transcriptomes of M. thermophila and T. terrestris growing at 45 ºC on either glucose, alfalfa, or barley straw by short-read sequencing of extracted mRNA. To better understand the adaptations that allow these fungi to grow at elevated temperatures, we compared their transcriptomes when growing at 34C to their transcritomes at 45C, and also to the transcriptome of the related fungus Chaetomium globosum, which does not grow at 45C. RNA was extracted from cultures in early growth stage growing with glucose, alfalfa, or barley straw as carbon source at 34C or 45C (M. thermophila and T. terrestris); duplicate cultures were sampled in some conditions.

2011-08-08 | E-GEOD-27323 | biostudies-arrayexpress

Transcriptomic response to different biomass in Myceliophthora thermophila (Sporotrichum thermophile)

Project description:The thermophilic filamentous fungi Myceliophthora thermophila (Sporotrichum thermophile) has an ability to decompose cellulolytic biomass. To identify the genes and proteins involved in this process, we explored the transcriptomes of M. thermophila grown at 45 °C on different agricultural straws (oat, triticale, canola, flax straws).

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Transcriptomic response to substrate and temperature in two thermophilic fungi, Myceliophthora thermophila and Thielavia terrestris, and a related mesophile, Chaetomium globosum

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Transcriptional landscape of Myceliophthora thermophila responding to soluble starch and the role of regulator AmyR on polysaccharide degradation

Project description:Thermophilic fungus Myceliophthora thermophila with great capacity for polysaccharides degradation is attractive to be engineered into a cell factory to produce chemicals and biofuels directly from renewable polysaccharides such as starch. Understanding the molecular mechanism of starch degradation of the fungi would be helpful. To date, there has been no transcriptome analysis on starch in thermophilic fungi. In this study, we performed the transcriptomic profile of M. thermophila responding to soluble starch, and a 342-gene set was identified as “starch regulon”, including the major amylolytic enzyme (Mycth_72393), which was verified thereafter as the most important such hydrolase for starch degradation in this fungus. Moreover, the function of key amylolytic enzyme regulator AmyR in M. thermophila was evaluated by analyzing the performance of its deletion mutant using our CRISPR/Cas9 system, which showed significantly decreased amylase activity and poor growth on starch. Additionally, deletion of amyR led to resistance to carbon catabolite repression (CCR) and enhanced cellulases production. Our study provides an insight into understanding the molecular basis of starch degradation in this thermophilic fungus, and will accelerate the fungal strain rational engineering for starch-based biochemical production.

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Myceliophthora thermophila Xyr1 is predominantly involved in xylan degradation and xylose catabolism

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Transcriptional profiling of Myceliophthora thermophila on galactose and metabolic engineering for improved galactose utilization

Project description:Transcriptional landscape of MyceliopTranscriptional profiling of Myceliophthora thermophila on galactose and metabolic engineering for improved galactose utilization thora thermophila responding to soluble starch and the role of regulator AmyR on polysaccharide degradation Efficient biological conversion of all sugars from lignocellulosic biomass is necessary for cost-effective production of biofuels and commodity chemicals. Galactose is the next most abundant sugar in many hemicelluloses and it will be important to capture this carbon for an efficient bioconversion process of plant biomass. Thermophilic fugus Myceliophthora thermophila has been used as cell factory to produce biochemicals directly from renewable polysaccharides. This study determined the transcriptomic profiles of M. thermophila responding to galactose and identified the gene involved in the oxido-reductive pathway for galactose degradation, of which hexokinase might be the rate-limiting enzyme in this thermophilic fungus. Galactokinase was necessary for high induction of galactose transporter and disruption of galK resulted in decreased galactose utilization. Both of galactokinase deletion and sugar transporter overexpression could further activate the oxido-reductive pathway and led to improved galactose utilization. In addition, disruption of the Leloir pathway brought about reduced tolerance to cell wall perturbation, oxidative stress and high osmolality. In order to accelerate galactose consumption, the third galactose-degradation pathway- De Ley-Doudoroff pathway was successfully integrated into M. thermophila and the consumption rate of galactose was increased by 57%. This study will be benefit for the rational design of fungal strains to produce biofuels and biochemical from plant biomass, especially, marine plant biomass with the abundant of galactose, such as red seaweed and molasses.

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Project description:Producing the fuels and chemicals from renewable plant biomass has been thought as a feasible way for global sustainable development. However, the economical efficiency of biorefinery remains challenges. Here a cellulolytic thermophilic fungus, Myceliophthora thermophila, was constructed into a platform through metabolic engineering, which can efficiently convert lignocellulose to important bulk chemicals for polymers, four carbon 1, 4-diacids (malic and succinic acid), directly from lignocellulose without any extra enzymes addition or complicated pretreatment, with titer of over 200 g/L on cellulose and 110 g/L on plant biomass (corncob) during fed-batch fermentation. Our study represents a milestone of consolidated bioprocessing technology (CBP) and offers a new promising system for cost-effectively production of biomass-based chemicals and potentially fuels.

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Sexual crossing of thermophilic fungus Myceliophthora heterothallica improved enzymatic degradation of sugar beet pulp

Project description:Enzymatic degradation of plant biomass requires a complex mixture of many different enzymes. Like most fungi, thermophilic Myceliophthora species therefore have a large set of enzymes targeting different linkages in plant polysaccharides. The majority of these enzymes have not been functionally characterized and their role in plant biomass degradation is unknown. This study describes a strategy using sexual crossing and screening with the thermophilic fungus Myceliophthora heterothallica to identify specific enzymes associated with improved sugar beet pulp saccharification.Two genetically diverse M. heterothallica strains CBS 203.75 and CBS 663.74 were used to generate progenies with improved growth on sugar beet pulp. One progeny, named SBP.F1.2.11, had a different genetic pattern from the parental strains, and had improved saccharification activity after growth on 3% sugar beet pulp. Exo-proteome analysis of progeny and parental strains after 7 days growth on sugar beet pulp showed that only 17 of the 133 secreted CAZy enzymes were more abundant in progeny SBP.F1.2.11. Particularly one enzyme belonging to the carbohydrate esterase family 5 (CE5) was more present in SBP.F1.2.11. This CE5-CBM1 enzyme, named as Axe1, was phylogenetically related to acetyl xylan esterases.

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