摘要:
The present invention relates to novel xylose-fermenting yeast strains (for example, yeast of the genus Saccharomyces, e.g., S. cerevisiae) with an enhanced ability to ferment the xylose (and/or another pentose sugar) present in a lignocellulosic hydrolysate to a fermentation product(s) (for example, an alcohol (e.g., ethanol) or a sugar alcohol (e.g., xylitol)).
摘要:
The present invention relates to novel xylose-fermenting yeast strains (for example, yeast of the genus Saccharomyces, e.g., S. cerevisiae) with an enhanced ability to ferment the xylose (and/or another pentose sugar) present in a lignocellulosic hydrolysate to a fermentation product(s) (for example, an alcohol (e.g., ethanol) or a sugar alcohol (e.g., xylitol)).
摘要:
The present invention relates to a depilling composition comprising an enzyme mixture that comprises a Family 45 cellulase and one or more additional cellulases selected from a Family 5 cellulase, a Family 6 cellulase or a combination thereof. The enzyme mixture may be characterized in that the Family 45 and Family 5 cellulases or the Family 45 and Family 6 cellulases are present at a weight ratio that exhibits synergy in an assay that measures specific depilling activity. The enzyme mixture may be secreted by a genetically modified microbe overexpressing the foregoing cellulases. Also provided is a process for depilling that comprises a step of contacting cellulose-containing goods with the depilling composition.
摘要:
Provided are isolated cellobiohydrolases comprising a modified Glycoside Hydrolase (GH) Family 7 catalytic domain, a GH Family 7 catalytic domain and a modified Family 1 carbohydrate binding module (CBM), or both a modified Family 7 catalytic domain and a modified Family 1 CBM. Such isolated cellobiohydrolases exhibit from 45% to about 99.9% amino acid sequence identity to amino acids 1-436 of SEQ ID NO: 1 or to amino acids 1-438 of SEQ ID NO: 2 and improved activity on process substrates. Also provided are genetic constructs and genetically modified microbes for expressing the isolated cellobiohydrolases, a process for producing the isolated cellobiohydrolases, cellulase enzyme mixtures comprising the isolated cellobiohydrolase and a process for hydrolyzing a cellulosic substrate with such cellulase enzyme mixtures.
摘要翻译:提供的是分离的纤维二糖水解酶,其包含修饰的糖苷水解酶(GH)家族7催化结构域,GH家族7催化结构域和修饰的家族1碳水化合物结合模块(CBM),或修饰的家族7催化结构域和修饰的家族1 CBM两者。 这种分离的纤维二糖水解酶显示与SEQ ID NO:1的氨基酸1-436或SEQ ID NO:2的氨基酸1-438具有45%至约99.9%的氨基酸序列同一性,并且改善了对工艺底物的活性。 还提供了用于表达分离的纤维二糖水解酶的遗传构建体和遗传修饰的微生物,用于产生分离的纤维二糖水解酶的方法,包含分离的纤维二糖水解酶的纤维素酶混合物和用这种纤维素酶混合物水解纤维素底物的方法。
摘要:
A fermentation process for the production of cellulase mixtures is provided. The process comprises providing a genetically modified host filamentous fungus that overexpresses a Xyr1 transcription factor and/or that is partially or completely deficient in expressing one or more hemicellulase enzyme. The host filamentous fungus is cultured in a medium comprising a carbon source. The carbon source contains from about 60 wt % to about 100 wt % hemicellulose-derived carbohydrate and less than 5% of a cellulase-inducing carbohydrate or contains from about 25 wt % to about 100% wt % hemicellulose-derived sugar alcohol in combination with from about 0 wt % to about 75 wt % glucose, glycerol or a combination thereof.
摘要:
Provided are isolated cellobiohydrolases comprising a modified Glycoside Hydrolase (GH) Family 7 catalytic domain, a GH Family 7 catalytic domain and a modified Family 1 carbohydrate binding module (CBM), or both a modified Family 7 catalytic domain and a modified Family 1 CBM. Such isolated cellobiohydrolases exhibit from 45% to about 99.9% amino acid sequence identity to amino acids 1-436 of SEQ ID NO: 1 or to amino acids 1-438 of SEQ ID NO: 2 and improved activity on process substrates. Also provided are genetic constructs and genetically modified microbes for expressing the isolated cellobiohydrolases, a process for producing the isolated cellobiohydrolases, cellulase enzyme mixtures comprising the isolated cellobiohydrolase and a process for hydrolysing a cellulosic substrate with such cellulase enzyme mixtures.
摘要翻译:提供的是分离的纤维二糖水解酶,其包含修饰的糖苷水解酶(GH)家族7催化结构域,GH家族7催化结构域和修饰的家族1碳水化合物结合模块(CBM),或修饰的家族7催化结构域和修饰的家族1 CBM两者。 这种分离的纤维二糖水解酶显示与SEQ ID NO:1的氨基酸1-436或SEQ ID NO:2的氨基酸1-438具有45%至约99.9%的氨基酸序列同一性,并且改善了对工艺底物的活性。 还提供用于表达分离的纤维二糖水解酶的遗传构建体和遗传修饰的微生物,用于产生分离的纤维二糖水解酶的方法,包含分离的纤维二糖水解酶的纤维素酶混合物和用这种纤维素酶混合物水解纤维素底物的方法。
摘要:
The present invention relates to a depilling composition comprising an enzyme mixture that comprises a Family 45 cellulase enzyme component and one or more additional cellulase enzyme components selected from a Family 5 cellulase, a Family 6 cellulase or a combination thereof. The enzyme mixture may be characterized in that the Family 45 and the Family 5 cellulase enzyme components or the Family 45 and the Family 6 cellulase enzyme components are present at a weight ratio that exhibits synergy in an assay that measures specific depilling activity. The enzyme mixture may be secreted by a genetically modified microbe overexpressing theforegoing cellulase enzyme components. Also provided is a process for depilling that comprises a step of contacting cellulose-containing goods with the depilling composition.
摘要:
A fermentation process for the production of cellulase mixtures is provided. The process comprises providing a genetically modified host filamentous fungus that overexpresses a Xyr1 transcription factor and/or that is partially or completely deficient in expressing one or more hemicellulase enzyme. The host filamentous fungus is cultured in a medium comprising a carbon source. The carbon source contains from about 60 wt % to about 100 wt % hemicellulose-derived carbohydrate and less than 5% of a cellulase-inducing carbohydrate or contains from about 25 wt % to about 100% wt % hemicellulose-derived sugar alcohol in combination with from about 0 wt % to about 75 wt % glucose, glycerol or a combination thereof.