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Mining for novel cellulase genes metagenomic assembly

ABSTRACT: EMG produced TPA metagenomics assembly of the Mining for novel cellulase genes from different ecosystem metagenomes (Mining for novel cellulase genes) data set

PROVIDER: PRJEB22517 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	OBJA01.dat.gz	Other
	OBJA01.fasta.gz	Fasta.gz
	OBJA01.master.dat	Other
	OBJA01.dat.gz	Other

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Mining for novel cellulase genes

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Disruption of serine/threonine protein kinase STK-12 increases cellulase expression in Neurospora crassa

Project description:In this work, we reported that STK-12 functions as a novel repressor of cellulase expression. The stk-12 disruption strain not only displayed enhanced cellulase production but also retained a steady state, with high expression levels of cellulase genes, for longer than the wild type strain.

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The putative cellodextrin transporter-like protein CLP1 is involved in cellulase induction in Neurospora crassa

Project description:Neurospora crassa recently has become a novel system to investigate cellulase induction. Here, we discovered a novel membrane protein, CLP1 (NCU05853), a putative cellodextrin transporter-like protein, that is a critical component of the cellulase induction pathway in N. crassa. Although CLP1 protein cannot transport cellodextrin, the suppression of cellulase induction by this protein was discovered on both cellobiose and Avicel. The co-disruption of the cellodextrin transporters cdt2 and clp1 in strain M-NM-^T3M-NM-2G formed strain CPL7. With induction by cellobiose, cellulase production was enhanced 6.9-fold in CPL7 compared with M-NM-^T3M-NM-2G. We also showed that the suppression of cellulase expression by CLP1 occurred by repressing the expression of cellodextrin transporters, particularly cdt1 expression. Transcriptome analysis of the hypercellulase-producing strain CPL7 showed that the cellulase expression machinery was dramatically stimulated, as were the cellulase enzyme genes including the inducer transporters and the major transcriptional regulators. N. crassa was pregrown in sucrose and transferred to cellobiose media. Up regulated and down regulated genes expressions were compared with M-NM-^T3M-NM-2G and M-NM-^T3M-NM-2GM-NM-^Tclp1 strain.

2014-11-13 | E-GEOD-60004 | biostudies-arrayexpress

The putative cellodextrin transporter-like protein CLP1 is involved in cellulase induction in Neurospora crassa

Project description:Neurospora crassa recently has become a novel system to investigate cellulase induction. Here, we discovered a novel membrane protein, CLP1 (NCU05853), a putative cellodextrin transporter-like protein, that is a critical component of the cellulase induction pathway in N. crassa. Although CLP1 protein cannot transport cellodextrin, the suppression of cellulase induction by this protein was discovered on both cellobiose and Avicel. The co-disruption of the cellodextrin transporters cdt2 and clp1 in strain Δ3βG formed strain CPL7. With induction by cellobiose, cellulase production was enhanced 6.9-fold in CPL7 compared with Δ3βG. We also showed that the suppression of cellulase expression by CLP1 occurred by repressing the expression of cellodextrin transporters, particularly cdt1 expression. Transcriptome analysis of the hypercellulase-producing strain CPL7 showed that the cellulase expression machinery was dramatically stimulated, as were the cellulase enzyme genes including the inducer transporters and the major transcriptional regulators.

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Comparative genomic, transcriptomic and secretomic profilings of Penicillium oxalicum HP7-1 and its cellulase and xylanase hyper-producing mutant EU2106, and identification of two novel regulators for cellulase and xylanase gene expression

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Project description:Purpose: To explore conservation of gene regulation by the transcription factor clr-2/clrB in Neurospora crassa and Aspergillus nidulans Methods: mRNA from wild type and clr-2/clrB mutants were collected after a culture shift from sucrose/glucose to Avicel (crystaline cellulose) or no carbon media Results: We show that N. crassa and A. nidulans have similair global transcriptional responses to Avicel, with several hundred genes showing specific induction, though the induced genes are more specifically targeted at cellulose for N. crassa and more targeted at hemicellulose and pectin for A. nidulans. clr-2/clrB has a conserved fundamental function in cellulose induction, though the mechanism has diverged. Misexpression of clr-2 is sufficeint for inducer free cellulase secretion in N. crassa, but neither clrB or heterologous clr-2 is sufficient for inducer free cellulase secretion in A. nidulans. Conclusions: Our study demonstrates a conserved and essential role in cellulose utilization for the transcription factor clr-2 in filamentous ascomycetes and demonstrates that manipulation of clr-2 expression can be used to control cellulase expression in some species.

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Inducer Free Cellulase Secretion in Neurospora Crassa and comparitive analysis of cellulase induction in Aspergillus nidulans

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Genome sequencing and transcriptome analysis of Trichoderma reesei QM9978 reveals vib1 to be essential for cellulase induction

Project description:The ascomycete Trichoderma reesei is an industrial producer of cellulolytic and hemicellulolytic enzymes and also serves as a model for investigations on these enzymes and their genes. The strain QM9978 has a cellulase negative phenotype and therefore presents a valuable tool for understanding the mechanisms underlying cellulase regulation. A transcriptomic analyses of the cellulase negative strain QM9978 and the original strain QM6a have been performed to identify the genetic differences between QM6a and QM9978 leading to the cellulase-negative phenotype

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