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

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

PROVIDER: PRJNA946275 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23907600_1.fastq.gz	Fastqsanger.gz
	SRR23907600_2.fastq.gz	Fastqsanger.gz
	SRR23907601_1.fastq.gz	Fastqsanger.gz
	SRR23907601_2.fastq.gz	Fastqsanger.gz
	SRR23907602_1.fastq.gz	Fastqsanger.gz

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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.

2023-08-21 | GSE227646 | GEO

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.

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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

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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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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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