A third xylanase from Trichoderma reesei PC-3-7

Xu, Jun; Takakuwa, Naoya; Nogawa, Masahiro; Okada, Hirofumi; Morikawa, Yasushi

doi:10.1007/s002530051237

Cited by 75 publications

(46 citation statements)

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“…The L-arabinose-induced xylanases are XYN1, XYN4, and XYN5. XYN3 has previously been described to be expressed only in the QM9414 mutant strain PC-3-7 on cellulose, L-sorbose, and sophorose (6). While our data confirmed the absence of D-xyloseinduced expression in the parent strain QM9414, we nevertheless found notable expression upon induction by L-arabinose in strains blocked in either the reduction of L-arabinose (⌬xyl1) or oxidation of L-arabitol (⌬lad1/⌬xdh1).…”

Section: Discussioncontrasting

confidence: 36%

“…With regard to its xylanases, four have been purified and characterized: two members of glycosyl hydrolase family 11 (GH11) (XYN1 and XYN2) (3,4), the GH10 member XYN3 (5,6), and the GH30 member XYN4 (7). While the first three are all endo-␤-1,4-xylanases, XYN4 is classified as a xylan 1,4-␤-xylosidase, because it produces D-xylose as the main end product from xylan.…”

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confidence: 99%

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Xylanase Gene Transcription in Trichoderma reesei Is Triggered by Different Inducers Representing Different Hemicellulosic Pentose Polymers

et al. 2013

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Section: Discussioncontrasting

confidence: 36%

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confidence: 99%

Xylanase Gene Transcription in Trichoderma reesei Is Triggered by Different Inducers Representing Different Hemicellulosic Pentose Polymers

et al. 2013

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“…Among the hemicellulases that have been studied, all except arabinofuranosidase are expressed at a substantially higher level when T. reesei is grown in medium containing cellulose than when it is grown in medium containing non-inducing carbon sources such as sorbitol (28,32). Additionally, expression of many of the genes encoding these enzymes, with the notable exception of man1, is induced by xylans.…”

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confidence: 99%

“…In addition to enzymes with cellulolytic activity, a number of enzymes have been identified in T. reesei that degrade hemicellulose (17,(22)(23)(24)(25)(26)(27)(28)(29)(30)(31). These enzymes include four xylanases (Xyn1, Xyn2, Xyn3, and Xyn4) and mannanase (Man1), which cleave the xylan and mannan main chains of hemicellulose.…”

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confidence: 99%

Transcriptional Regulation of Biomass-degrading Enzymes in the Filamentous Fungus Trichoderma reesei

Foreman¹,

Brown

Dankmeyer³

et al. 2003

Journal of Biological Chemistry

427

341

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The filamentous fungus Trichoderma reesei produces and secretes profuse quantities of enzymes that act synergistically to degrade cellulase and related biomass components. We partially sequenced over 5100 random T. reesei cDNA clones. Among the sequences whose predicted gene products had significant similarity to known proteins, 12 were identified that encode previously unknown enzymes that likely function in biomass degradation. Microarrays were used to query the expression levels of each of the sequences under different conditions known to induce cellulolytic enzyme synthesis. Most of the genes encoding known and putative biomass-degrading enzymes were transcriptionally coregulated. Moreover, despite the fact that several of these enzymes are not thought to degrade cellulase directly, they were coordinately overexpressed in a cellulase overproducing strain. A variety of additional sequences whose function could not be ascribed using the limited sequence available displayed analogous behavior and may also play a role in biomass degradation or in the synthesis of biomass-degrading enzymes. Sequences exhibiting additional regulatory patterns were observed that might reflect roles in regulation of cellulase biosynthesis. However, genes whose products are involved in protein processing and secretion were not highly regulated during cellulase induction.

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“…Cost is an important factor for large scale expansion of bioethanol production. On the other hand millions of tons of agricultural residues are abundantly available [6] and since no economically viable technologies are available for their conversion, most farmers burn them in the field. This not only pollute the environment, but also causes other problems such as the disruption of air transportation by smoke clouds in the sky [7].…”

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confidence: 99%

Bioethanol Production from Lignocellulosic Waste-A Review

Mohanty¹,

Abdullahi²

2016

Biosci., Biotech. Res. Asia

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Petroleum and other fossil fuel has been the main energy source for a long period of time in human life. Through these energy sources, the world has been a developing and industrializing entity. However, it is agreed that these traditional sources of energy cannot remain forever as they are non-renewable. Many experts predicted that oil production will keep on decreasing, as the present oil wells keep on decreasing and fewer oil reserves are discovered. This led to increasing price of the minerals and eventually makes them economically unsustainable. As such, renewable source of energy has to be sourced. Bioethanol; a renewable energy source is being produced from food materials such as sugar cane, maize etc. However, if these are to be used for energy production, the world will be entering into another crisis as they will be competed for food and energy. Lignocellulosic wastes such as Rice straw, Wheat straw, Corn straw and Bagasse contain same sugar molecules for bioethanol production as such can be used to generate renewable energy using appropriate physical, chemical and biological techniques. This paper aims at exploring the process of bioethanol production from lignocellulosic wastes.

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A third xylanase from Trichoderma reesei PC-3-7

Cited by 75 publications

References 0 publications

Xylanase Gene Transcription in Trichoderma reesei Is Triggered by Different Inducers Representing Different Hemicellulosic Pentose Polymers

Xylanase Gene Transcription in Trichoderma reesei Is Triggered by Different Inducers Representing Different Hemicellulosic Pentose Polymers

Transcriptional Regulation of Biomass-degrading Enzymes in the Filamentous Fungus Trichoderma reesei

Bioethanol Production from Lignocellulosic Waste-A Review

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